diff --git a/decnet/services/sniffer.py b/decnet/services/sniffer.py
new file mode 100644
index 0000000..6bf9c44
--- /dev/null
+++ b/decnet/services/sniffer.py
@@ -0,0 +1,40 @@
+from pathlib import Path
+from decnet.services.base import BaseService
+
+TEMPLATES_DIR = Path(__file__).parent.parent.parent / "templates" / "sniffer"
+
+
+class SnifferService(BaseService):
+    """
+    Passive network sniffer deployed alongside deckies on the MACVLAN.
+
+    Captures TLS handshakes in promiscuous mode and extracts JA3/JA3S hashes
+    plus connection metadata. Requires NET_RAW + NET_ADMIN capabilities.
+    No inbound ports — purely passive.
+    """
+
+    name = "sniffer"
+    ports: list[int] = []
+    default_image = "build"
+
+    def compose_fragment(
+        self,
+        decky_name: str,
+        log_target: str | None = None,
+        service_cfg: dict | None = None,
+    ) -> dict:
+        fragment: dict = {
+            "build": {"context": str(TEMPLATES_DIR)},
+            "container_name": f"{decky_name}-sniffer",
+            "restart": "unless-stopped",
+            "cap_add": ["NET_RAW", "NET_ADMIN"],
+            "environment": {
+                "NODE_NAME": decky_name,
+            },
+        }
+        if log_target:
+            fragment["environment"]["LOG_TARGET"] = log_target
+        return fragment
+
+    def dockerfile_context(self) -> Path | None:
+        return TEMPLATES_DIR
diff --git a/decnet/web/api.py b/decnet/web/api.py
index 4eabe79..f1cfbb7 100644
--- a/decnet/web/api.py
+++ b/decnet/web/api.py
@@ -14,16 +14,18 @@ from decnet.logging import get_logger
 from decnet.web.dependencies import repo
 from decnet.collector import log_collector_worker
 from decnet.web.ingester import log_ingestion_worker
+from decnet.web.attacker_worker import attacker_profile_worker
 from decnet.web.router import api_router
 
 log = get_logger("api")
 ingestion_task: Optional[asyncio.Task[Any]] = None
 collector_task: Optional[asyncio.Task[Any]] = None
+attacker_task: Optional[asyncio.Task[Any]] = None
 
 
 @asynccontextmanager
 async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
-    global ingestion_task, collector_task
+    global ingestion_task, collector_task, attacker_task
 
     log.info("API startup initialising database")
     for attempt in range(1, 6):
@@ -51,13 +53,18 @@ async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
             log.debug("API startup collector worker started log_file=%s", _log_file)
         elif not _log_file:
             log.warning("DECNET_INGEST_LOG_FILE not set — Docker log collection disabled.")
+
+        # Start attacker profile rebuild worker
+        if attacker_task is None or attacker_task.done():
+            attacker_task = asyncio.create_task(attacker_profile_worker(repo))
+            log.debug("API startup attacker profile worker started")
     else:
         log.info("Contract Test Mode: skipping background worker startup")
 
     yield
 
     log.info("API shutdown cancelling background tasks")
-    for task in (ingestion_task, collector_task):
+    for task in (ingestion_task, collector_task, attacker_task):
         if task and not task.done():
             task.cancel()
             try:
diff --git a/decnet/web/attacker_worker.py b/decnet/web/attacker_worker.py
new file mode 100644
index 0000000..7d207fa
--- /dev/null
+++ b/decnet/web/attacker_worker.py
@@ -0,0 +1,176 @@
+"""
+Attacker profile builder — background worker.
+
+Periodically rebuilds the `attackers` table by:
+  1. Feeding all stored Log.raw_line values through the CorrelationEngine
+     (which parses RFC 5424 and tracks per-IP event histories + traversals).
+  2. Merging with the Bounty table (fingerprints, credentials).
+  3. Extracting commands executed per IP from the structured log fields.
+  4. Upserting one Attacker record per observed IP.
+
+Runs every _REBUILD_INTERVAL seconds. Full rebuild each cycle — simple and
+correct at honeypot log volumes.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import json
+from datetime import datetime, timezone
+from typing import Any
+
+from decnet.correlation.engine import CorrelationEngine
+from decnet.correlation.parser import LogEvent
+from decnet.logging import get_logger
+from decnet.web.db.repository import BaseRepository
+
+logger = get_logger("attacker_worker")
+
+_REBUILD_INTERVAL = 30  # seconds
+
+# Event types that indicate active command/query execution (not just connection/scan)
+_COMMAND_EVENT_TYPES = frozenset({
+    "command", "exec", "query", "input", "shell_input",
+    "execute", "run", "sql_query", "redis_command",
+})
+
+# Fields that carry the executed command/query text
+_COMMAND_FIELDS = ("command", "query", "input", "line", "sql", "cmd")
+
+
+async def attacker_profile_worker(repo: BaseRepository) -> None:
+    """Periodically rebuilds the Attacker table. Designed to run as an asyncio Task."""
+    logger.info("attacker profile worker started interval=%ds", _REBUILD_INTERVAL)
+    while True:
+        await asyncio.sleep(_REBUILD_INTERVAL)
+        try:
+            await _rebuild(repo)
+        except Exception as exc:
+            logger.error("attacker worker: rebuild failed: %s", exc)
+
+
+async def _rebuild(repo: BaseRepository) -> None:
+    all_logs = await repo.get_all_logs_raw()
+    if not all_logs:
+        return
+
+    # Feed raw RFC 5424 lines into the CorrelationEngine
+    engine = CorrelationEngine()
+    for row in all_logs:
+        engine.ingest(row["raw_line"])
+
+    if not engine._events:
+        return
+
+    traversal_map = {t.attacker_ip: t for t in engine.traversals(min_deckies=2)}
+    all_bounties = await repo.get_all_bounties_by_ip()
+
+    count = 0
+    for ip, events in engine._events.items():
+        traversal = traversal_map.get(ip)
+        bounties = all_bounties.get(ip, [])
+        commands = _extract_commands(all_logs, ip)
+
+        record = _build_record(ip, events, traversal, bounties, commands)
+        await repo.upsert_attacker(record)
+        count += 1
+
+    logger.debug("attacker worker: rebuilt %d profiles", count)
+
+
+def _build_record(
+    ip: str,
+    events: list[LogEvent],
+    traversal: Any,
+    bounties: list[dict[str, Any]],
+    commands: list[dict[str, Any]],
+) -> dict[str, Any]:
+    services = sorted({e.service for e in events})
+    deckies = (
+        traversal.deckies
+        if traversal
+        else _first_contact_deckies(events)
+    )
+    fingerprints = [b for b in bounties if b.get("bounty_type") == "fingerprint"]
+    credential_count = sum(1 for b in bounties if b.get("bounty_type") == "credential")
+
+    return {
+        "ip": ip,
+        "first_seen": min(e.timestamp for e in events),
+        "last_seen": max(e.timestamp for e in events),
+        "event_count": len(events),
+        "service_count": len(services),
+        "decky_count": len({e.decky for e in events}),
+        "services": json.dumps(services),
+        "deckies": json.dumps(deckies),
+        "traversal_path": traversal.path if traversal else None,
+        "is_traversal": traversal is not None,
+        "bounty_count": len(bounties),
+        "credential_count": credential_count,
+        "fingerprints": json.dumps(fingerprints),
+        "commands": json.dumps(commands),
+        "updated_at": datetime.now(timezone.utc),
+    }
+
+
+def _first_contact_deckies(events: list[LogEvent]) -> list[str]:
+    """Return unique deckies in first-contact order (for non-traversal attackers)."""
+    seen: list[str] = []
+    for e in sorted(events, key=lambda x: x.timestamp):
+        if e.decky not in seen:
+            seen.append(e.decky)
+    return seen
+
+
+def _extract_commands(
+    all_logs: list[dict[str, Any]], ip: str
+) -> list[dict[str, Any]]:
+    """
+    Extract executed commands for a given attacker IP from raw log rows.
+
+    Looks for rows where:
+    - attacker_ip matches
+    - event_type is a known command-execution type
+    - fields JSON contains a command-like key
+
+    Returns a list of {service, decky, command, timestamp} dicts.
+    """
+    commands: list[dict[str, Any]] = []
+    for row in all_logs:
+        if row.get("attacker_ip") != ip:
+            continue
+        if row.get("event_type") not in _COMMAND_EVENT_TYPES:
+            continue
+
+        raw_fields = row.get("fields")
+        if not raw_fields:
+            continue
+
+        # fields is stored as a JSON string in the DB row
+        if isinstance(raw_fields, str):
+            try:
+                fields = json.loads(raw_fields)
+            except (json.JSONDecodeError, ValueError):
+                continue
+        else:
+            fields = raw_fields
+
+        cmd_text: str | None = None
+        for key in _COMMAND_FIELDS:
+            val = fields.get(key)
+            if val:
+                cmd_text = str(val)
+                break
+
+        if not cmd_text:
+            continue
+
+        ts = row.get("timestamp")
+        commands.append({
+            "service": row.get("service", ""),
+            "decky": row.get("decky", ""),
+            "command": cmd_text,
+            "timestamp": ts.isoformat() if isinstance(ts, datetime) else str(ts),
+        })
+
+    return commands
diff --git a/decnet/web/db/models.py b/decnet/web/db/models.py
index 681db23..a8e18d1 100644
--- a/decnet/web/db/models.py
+++ b/decnet/web/db/models.py
@@ -50,6 +50,27 @@ class State(SQLModel, table=True):
     key: str = Field(primary_key=True)
     value: str  # Stores JSON serialized DecnetConfig or other state blobs
 
+
+class Attacker(SQLModel, table=True):
+    __tablename__ = "attackers"
+    ip: str = Field(primary_key=True)
+    first_seen: datetime = Field(index=True)
+    last_seen: datetime = Field(index=True)
+    event_count: int = Field(default=0)
+    service_count: int = Field(default=0)
+    decky_count: int = Field(default=0)
+    services: str = Field(default="[]")       # JSON list[str]
+    deckies: str = Field(default="[]")        # JSON list[str], first-contact ordered
+    traversal_path: Optional[str] = None      # "decky-01 → decky-03 → decky-05"
+    is_traversal: bool = Field(default=False)
+    bounty_count: int = Field(default=0)
+    credential_count: int = Field(default=0)
+    fingerprints: str = Field(default="[]")   # JSON list[dict] — bounty fingerprints
+    commands: str = Field(default="[]")       # JSON list[dict] — commands per service/decky
+    updated_at: datetime = Field(
+        default_factory=lambda: datetime.now(timezone.utc), index=True
+    )
+
 # --- API Request/Response Models (Pydantic) ---
 
 class Token(BaseModel):
@@ -77,6 +98,12 @@ class BountyResponse(BaseModel):
     offset: int
     data: List[dict[str, Any]]
 
+class AttackersResponse(BaseModel):
+    total: int
+    limit: int
+    offset: int
+    data: List[dict[str, Any]]
+
 class StatsResponse(BaseModel):
     total_logs: int
     unique_attackers: int
diff --git a/decnet/web/db/repository.py b/decnet/web/db/repository.py
index 08a6259..7fcfdaa 100644
--- a/decnet/web/db/repository.py
+++ b/decnet/web/db/repository.py
@@ -90,3 +90,34 @@ class BaseRepository(ABC):
     async def set_state(self, key: str, value: Any) -> None:
         """Store a specific state entry by key."""
         pass
+
+    @abstractmethod
+    async def get_all_logs_raw(self) -> list[dict[str, Any]]:
+        """Retrieve all log rows with fields needed by the attacker profile worker."""
+        pass
+
+    @abstractmethod
+    async def get_all_bounties_by_ip(self) -> dict[str, list[dict[str, Any]]]:
+        """Retrieve all bounty rows grouped by attacker_ip."""
+        pass
+
+    @abstractmethod
+    async def upsert_attacker(self, data: dict[str, Any]) -> None:
+        """Insert or replace an attacker profile record."""
+        pass
+
+    @abstractmethod
+    async def get_attackers(
+        self,
+        limit: int = 50,
+        offset: int = 0,
+        search: Optional[str] = None,
+        sort_by: str = "recent",
+    ) -> list[dict[str, Any]]:
+        """Retrieve paginated attacker profile records."""
+        pass
+
+    @abstractmethod
+    async def get_total_attackers(self, search: Optional[str] = None) -> int:
+        """Retrieve the total count of attacker profile records, optionally filtered."""
+        pass
diff --git a/decnet/web/db/sqlite/repository.py b/decnet/web/db/sqlite/repository.py
index b4768eb..49606cf 100644
--- a/decnet/web/db/sqlite/repository.py
+++ b/decnet/web/db/sqlite/repository.py
@@ -12,7 +12,7 @@ from decnet.config import load_state, _ROOT
 from decnet.env import DECNET_ADMIN_USER, DECNET_ADMIN_PASSWORD
 from decnet.web.auth import get_password_hash
 from decnet.web.db.repository import BaseRepository
-from decnet.web.db.models import User, Log, Bounty, State
+from decnet.web.db.models import User, Log, Bounty, State, Attacker
 from decnet.web.db.sqlite.database import get_async_engine
 
 
@@ -371,3 +371,92 @@ class SQLiteRepository(BaseRepository):
                 session.add(new_state)
 
             await session.commit()
+
+    # --------------------------------------------------------------- attackers
+
+    async def get_all_logs_raw(self) -> List[dict[str, Any]]:
+        async with self.session_factory() as session:
+            result = await session.execute(
+                select(
+                    Log.id,
+                    Log.raw_line,
+                    Log.attacker_ip,
+                    Log.service,
+                    Log.event_type,
+                    Log.decky,
+                    Log.timestamp,
+                    Log.fields,
+                )
+            )
+            return [
+                {
+                    "id": r.id,
+                    "raw_line": r.raw_line,
+                    "attacker_ip": r.attacker_ip,
+                    "service": r.service,
+                    "event_type": r.event_type,
+                    "decky": r.decky,
+                    "timestamp": r.timestamp,
+                    "fields": r.fields,
+                }
+                for r in result.all()
+            ]
+
+    async def get_all_bounties_by_ip(self) -> dict[str, List[dict[str, Any]]]:
+        from collections import defaultdict
+        async with self.session_factory() as session:
+            result = await session.execute(
+                select(Bounty).order_by(asc(Bounty.timestamp))
+            )
+            grouped: dict[str, List[dict[str, Any]]] = defaultdict(list)
+            for item in result.scalars().all():
+                d = item.model_dump(mode="json")
+                try:
+                    d["payload"] = json.loads(d["payload"])
+                except (json.JSONDecodeError, TypeError):
+                    pass
+                grouped[item.attacker_ip].append(d)
+            return dict(grouped)
+
+    async def upsert_attacker(self, data: dict[str, Any]) -> None:
+        async with self.session_factory() as session:
+            result = await session.execute(
+                select(Attacker).where(Attacker.ip == data["ip"])
+            )
+            existing = result.scalar_one_or_none()
+            if existing:
+                for k, v in data.items():
+                    setattr(existing, k, v)
+                session.add(existing)
+            else:
+                session.add(Attacker(**data))
+            await session.commit()
+
+    async def get_attackers(
+        self,
+        limit: int = 50,
+        offset: int = 0,
+        search: Optional[str] = None,
+        sort_by: str = "recent",
+    ) -> List[dict[str, Any]]:
+        order = {
+            "active": desc(Attacker.event_count),
+            "traversals": desc(Attacker.is_traversal),
+        }.get(sort_by, desc(Attacker.last_seen))
+
+        statement = select(Attacker).order_by(order).offset(offset).limit(limit)
+        if search:
+            statement = statement.where(Attacker.ip.like(f"%{search}%"))
+
+        async with self.session_factory() as session:
+            result = await session.execute(statement)
+            return [a.model_dump(mode="json") for a in result.scalars().all()]
+
+    async def get_total_attackers(self, search: Optional[str] = None) -> int:
+        statement = select(func.count()).select_from(Attacker)
+        if search:
+            statement = statement.where(Attacker.ip.like(f"%{search}%"))
+
+        async with self.session_factory() as session:
+            result = await session.execute(statement)
+            return result.scalar() or 0
diff --git a/decnet/web/ingester.py b/decnet/web/ingester.py
index 675b418..9427b90 100644
--- a/decnet/web/ingester.py
+++ b/decnet/web/ingester.py
@@ -130,3 +130,24 @@ async def _extract_bounty(repo: BaseRepository, log_data: dict[str, Any]) -> Non
 
     # 4. SSH client banner fingerprint (deferred — requires asyncssh server)
     # Fires on: service=ssh, event_type=client_banner, fields.client_banner
+
+    # 5. JA3/JA3S TLS fingerprint from sniffer container
+    _ja3 = _fields.get("ja3")
+    if _ja3 and log_data.get("service") == "sniffer":
+        await repo.add_bounty({
+            "decky": log_data.get("decky"),
+            "service": "sniffer",
+            "attacker_ip": log_data.get("attacker_ip"),
+            "bounty_type": "fingerprint",
+            "payload": {
+                "fingerprint_type": "ja3",
+                "ja3": _ja3,
+                "ja3s": _fields.get("ja3s"),
+                "tls_version": _fields.get("tls_version"),
+                "sni": _fields.get("sni") or None,
+                "alpn": _fields.get("alpn") or None,
+                "dst_port": _fields.get("dst_port"),
+                "raw_ciphers": _fields.get("raw_ciphers"),
+                "raw_extensions": _fields.get("raw_extensions"),
+            },
+        })
diff --git a/development/DEVELOPMENT.md b/development/DEVELOPMENT.md
index 681068f..76739b5 100644
--- a/development/DEVELOPMENT.md
+++ b/development/DEVELOPMENT.md
@@ -45,7 +45,7 @@
 
 ## Core / Hardening
 
-- [x] **Attacker fingerprinting** — HTTP User-Agent and VNC client version stored as `fingerprint` bounties. TLS JA3/JA4 and TCP window sizes require pcap (out of scope). SSH client banner deferred pending asyncssh server.
+- [~] **Attacker fingerprinting** — HTTP User-Agent, VNC client version stored as `fingerprint` bounties. JA3/JA3S in progress (sniffer container). HASSH, JA4+, TCP stack, JARM planned (see Attacker Intelligence section).
 - [ ] **Canary tokens** — Embed fake AWS keys and honeydocs into decky filesystems.
 - [ ] **Tarpit mode** — Slow down attackers by drip-feeding bytes or delaying responses.
 - [x] **Dynamic decky mutation** — Rotate exposed services or OS fingerprints over time.
@@ -84,6 +84,55 @@
 - [ ] **Realistic web apps** — Fake WordPress, Grafana, and phpMyAdmin templates.
 - [ ] **OT/ICS profiles** — Expanded Modbus, DNP3, and BACnet support.
 
+## Attacker Intelligence Collection
+*Goal: Build the richest possible attacker profile from passive observation across all 26 services.*
+
+### TLS/SSL Fingerprinting (via sniffer container)
+- [x] **JA3/JA3S** — TLS ClientHello/ServerHello fingerprint hashes
+- [ ] **JA4+ family** — JA4, JA4S, JA4H, JA4L (latency/geo estimation via RTT)
+- [ ] **JARM** — Active server fingerprint; identifies C2 framework from TLS server behavior
+- [ ] **CYU** — Citrix-specific TLS fingerprint
+- [ ] **TLS session resumption behavior** — Identifies tooling by how it handles session tickets
+- [ ] **Certificate details** — CN, SANs, issuer, validity period, self-signed flag (attacker-run servers)
+
+### Timing & Behavioral
+- [ ] **Inter-packet arrival times** — OS TCP stack fingerprint + beaconing interval detection
+- [ ] **TTL values** — Rough OS / hop-distance inference
+- [ ] **TCP window size & scaling** — p0f-style OS fingerprinting
+- [ ] **Retransmission patterns** — Identify lossy paths / throttled connections
+- [ ] **Beacon jitter variance** — Attribute tooling: Cobalt Strike vs. Sliver vs. Havoc have distinct profiles
+- [ ] **C2 check-in cadence** — Detect beaconing vs. interactive sessions
+- [ ] **Data exfil timing** — Behavioral sequencing relative to recon phase
+
+### Protocol Fingerprinting
+- [ ] **TCP/IP stack** — ISN patterns, DF bit, ToS/DSCP, IP ID sequence (random/incremental/zero)
+- [ ] **HASSH / HASSHServer** — SSH KEX algo, cipher, MAC order → tool fingerprint
+- [ ] **HTTP/2 fingerprint** — GREASE values, settings frame order, header pseudo-field ordering
+- [ ] **QUIC fingerprint** — Connection ID length, transport parameters order
+- [ ] **DNS behavior** — Query patterns, recursion flags, EDNS0 options, resolver fingerprint
+- [ ] **HTTP header ordering** — Tool-specific capitalization and ordering quirks
+
+### Network Topology Leakage
+- [ ] **X-Forwarded-For mismatches** — Detect VPN/proxy slip vs. actual source IP
+- [ ] **ICMP error messages** — Internal IP leakage from misconfigured attacker infra
+- [ ] **IPv6 link-local leakage** — IPv6 addrs leaked even over IPv4 VPN (common opsec fail)
+- [ ] **mDNS/LLMNR leakage** — Attacker hostname/device info from misconfigured systems
+
+### Geolocation & Infrastructure
+- [ ] **ASN lookup** — Source IP autonomous system number and org name
+- [ ] **BGP prefix / RPKI validity** — Route origin legitimacy
+- [ ] **PTR records** — rDNS for attacker IPs (catches infra with forgotten reverse DNS)
+- [ ] **Latency triangulation** — JA4L RTT estimates for rough geolocation
+
+### Service-Level Behavioral Profiling
+- [ ] **Commands executed** — Full command log per session (SSH, Telnet, FTP, Redis, DB services)
+- [ ] **Services actively interacted with** — Distinguish port scans from live exploitation attempts
+- [ ] **Tooling attribution** — Byte-sequence signatures from known C2 frameworks in handshakes
+- [ ] **Credential reuse patterns** — Same username/password tried across multiple deckies/services
+- [ ] **Payload signatures** — Hash and classify uploaded files, shellcode, exploit payloads
+
+---
+
 ## Developer Experience
 
 - [x] **API Fuzzing** — Property-based testing for all web endpoints.
diff --git a/pyproject.toml b/pyproject.toml
index fb47df0..ac445d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,6 +44,7 @@ dev = [
     "psycopg2-binary>=2.9.11",
     "paho-mqtt>=2.1.0",
     "pymongo>=4.16.0",
+    "scapy>=2.6.1",
 ]
 
 [project.scripts]
diff --git a/templates/sniffer/Dockerfile b/templates/sniffer/Dockerfile
new file mode 100644
index 0000000..c6a9702
--- /dev/null
+++ b/templates/sniffer/Dockerfile
@@ -0,0 +1,12 @@
+ARG BASE_IMAGE=debian:bookworm-slim
+FROM ${BASE_IMAGE}
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    python3 python3-pip libpcap-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN pip3 install --no-cache-dir --break-system-packages "scapy==2.6.1"
+
+COPY decnet_logging.py server.py /opt/
+
+ENTRYPOINT ["python3", "/opt/server.py"]
diff --git a/templates/sniffer/decnet_logging.py b/templates/sniffer/decnet_logging.py
new file mode 100644
index 0000000..5a64442
--- /dev/null
+++ b/templates/sniffer/decnet_logging.py
@@ -0,0 +1 @@
+# Placeholder — replaced by the deployer with the shared base template before docker build.
diff --git a/templates/sniffer/server.py b/templates/sniffer/server.py
new file mode 100644
index 0000000..53c3b79
--- /dev/null
+++ b/templates/sniffer/server.py
@@ -0,0 +1,392 @@
+#!/usr/bin/env python3
+"""
+DECNET passive TLS sniffer.
+
+Captures TLS handshakes on the MACVLAN interface (shared network namespace
+with the decky base container). Extracts JA3/JA3S fingerprints and connection
+metadata, then emits structured RFC 5424 log lines to stdout for the
+host-side collector to ingest.
+
+Requires: NET_RAW + NET_ADMIN capabilities (set in compose fragment).
+
+JA3  — MD5(SSLVersion,Ciphers,Extensions,EllipticCurves,ECPointFormats)
+JA3S — MD5(SSLVersion,Cipher,Extensions)
+
+GREASE values (RFC 8701) are excluded from all lists before hashing.
+"""
+
+from __future__ import annotations
+
+import hashlib
+import os
+import struct
+import time
+from typing import Any
+
+from scapy.layers.inet import IP, TCP
+from scapy.sendrecv import sniff
+
+from decnet_logging import SEVERITY_INFO, SEVERITY_WARNING, syslog_line, write_syslog_file
+
+# ─── Configuration ────────────────────────────────────────────────────────────
+
+NODE_NAME: str = os.environ.get("NODE_NAME", "decky-sniffer")
+SERVICE_NAME: str = "sniffer"
+
+# Session TTL in seconds — drop half-open sessions after this
+_SESSION_TTL: float = 60.0
+
+# GREASE values per RFC 8701 — 0x0A0A, 0x1A1A, 0x2A2A, ..., 0xFAFA
+_GREASE: frozenset[int] = frozenset(0x0A0A + i * 0x1010 for i in range(16))
+
+# TLS record / handshake type constants
+_TLS_RECORD_HANDSHAKE: int = 0x16
+_TLS_HT_CLIENT_HELLO: int = 0x01
+_TLS_HT_SERVER_HELLO: int = 0x02
+
+# TLS extension types we extract for metadata
+_EXT_SNI: int = 0x0000
+_EXT_SUPPORTED_GROUPS: int = 0x000A
+_EXT_EC_POINT_FORMATS: int = 0x000B
+_EXT_ALPN: int = 0x0010
+_EXT_SESSION_TICKET: int = 0x0023
+
+# ─── Session tracking ─────────────────────────────────────────────────────────
+
+# Key: (src_ip, src_port, dst_ip, dst_port) — forward 4-tuple from ClientHello
+# Value: parsed ClientHello metadata dict
+_sessions: dict[tuple[str, int, str, int], dict[str, Any]] = {}
+_session_ts: dict[tuple[str, int, str, int], float] = {}
+
+
+# ─── GREASE helpers ───────────────────────────────────────────────────────────
+
+def _is_grease(value: int) -> bool:
+    return value in _GREASE
+
+
+def _filter_grease(values: list[int]) -> list[int]:
+    return [v for v in values if not _is_grease(v)]
+
+
+# ─── Pure-Python TLS record parser ────────────────────────────────────────────
+
+def _parse_client_hello(data: bytes) -> dict[str, Any] | None:
+    """
+    Parse a TLS ClientHello from raw bytes (starting at TLS record header).
+    Returns a dict of parsed fields, or None if not a valid ClientHello.
+    """
+    try:
+        if len(data) < 6:
+            return None
+        # TLS record header: content_type(1) version(2) length(2)
+        if data[0] != _TLS_RECORD_HANDSHAKE:
+            return None
+        record_len = struct.unpack_from("!H", data, 3)[0]
+        if len(data) < 5 + record_len:
+            return None
+
+        # Handshake header: type(1) length(3)
+        hs = data[5:]
+        if hs[0] != _TLS_HT_CLIENT_HELLO:
+            return None
+
+        hs_len = struct.unpack_from("!I", b"\x00" + hs[1:4])[0]
+        body = hs[4: 4 + hs_len]
+        if len(body) < 34:
+            return None
+
+        pos = 0
+        # ClientHello version (2 bytes) — used for JA3
+        tls_version = struct.unpack_from("!H", body, pos)[0]
+        pos += 2
+
+        # Random (32 bytes)
+        pos += 32
+
+        # Session ID
+        session_id_len = body[pos]
+        pos += 1 + session_id_len
+
+        # Cipher Suites
+        cs_len = struct.unpack_from("!H", body, pos)[0]
+        pos += 2
+        cipher_suites = [
+            struct.unpack_from("!H", body, pos + i * 2)[0]
+            for i in range(cs_len // 2)
+        ]
+        pos += cs_len
+
+        # Compression Methods
+        comp_len = body[pos]
+        pos += 1 + comp_len
+
+        # Extensions
+        extensions: list[int] = []
+        supported_groups: list[int] = []
+        ec_point_formats: list[int] = []
+        sni: str = ""
+        alpn: list[str] = []
+
+        if pos + 2 <= len(body):
+            ext_total = struct.unpack_from("!H", body, pos)[0]
+            pos += 2
+            ext_end = pos + ext_total
+
+            while pos + 4 <= ext_end:
+                ext_type = struct.unpack_from("!H", body, pos)[0]
+                ext_len = struct.unpack_from("!H", body, pos + 2)[0]
+                ext_data = body[pos + 4: pos + 4 + ext_len]
+                pos += 4 + ext_len
+
+                if not _is_grease(ext_type):
+                    extensions.append(ext_type)
+
+                if ext_type == _EXT_SNI and len(ext_data) > 5:
+                    # server_name_list_length(2) type(1) name_length(2) name
+                    sni = ext_data[5:].decode("ascii", errors="replace")
+
+                elif ext_type == _EXT_SUPPORTED_GROUPS and len(ext_data) >= 2:
+                    grp_len = struct.unpack_from("!H", ext_data, 0)[0]
+                    supported_groups = [
+                        struct.unpack_from("!H", ext_data, 2 + i * 2)[0]
+                        for i in range(grp_len // 2)
+                    ]
+
+                elif ext_type == _EXT_EC_POINT_FORMATS and len(ext_data) >= 1:
+                    pf_len = ext_data[0]
+                    ec_point_formats = list(ext_data[1: 1 + pf_len])
+
+                elif ext_type == _EXT_ALPN and len(ext_data) >= 2:
+                    proto_list_len = struct.unpack_from("!H", ext_data, 0)[0]
+                    ap = 2
+                    while ap < 2 + proto_list_len:
+                        plen = ext_data[ap]
+                        alpn.append(ext_data[ap + 1: ap + 1 + plen].decode("ascii", errors="replace"))
+                        ap += 1 + plen
+
+        filtered_ciphers = _filter_grease(cipher_suites)
+        filtered_groups = _filter_grease(supported_groups)
+
+        return {
+            "tls_version": tls_version,
+            "cipher_suites": filtered_ciphers,
+            "extensions": extensions,
+            "supported_groups": filtered_groups,
+            "ec_point_formats": ec_point_formats,
+            "sni": sni,
+            "alpn": alpn,
+        }
+
+    except Exception:
+        return None
+
+
+def _parse_server_hello(data: bytes) -> dict[str, Any] | None:
+    """
+    Parse a TLS ServerHello from raw bytes.
+    Returns dict with tls_version, cipher_suite, extensions, or None.
+    """
+    try:
+        if len(data) < 6 or data[0] != _TLS_RECORD_HANDSHAKE:
+            return None
+
+        hs = data[5:]
+        if hs[0] != _TLS_HT_SERVER_HELLO:
+            return None
+
+        hs_len = struct.unpack_from("!I", b"\x00" + hs[1:4])[0]
+        body = hs[4: 4 + hs_len]
+        if len(body) < 35:
+            return None
+
+        pos = 0
+        tls_version = struct.unpack_from("!H", body, pos)[0]
+        pos += 2
+
+        # Random (32 bytes)
+        pos += 32
+
+        # Session ID
+        session_id_len = body[pos]
+        pos += 1 + session_id_len
+
+        if pos + 2 > len(body):
+            return None
+
+        cipher_suite = struct.unpack_from("!H", body, pos)[0]
+        pos += 2
+
+        # Compression method (1 byte)
+        pos += 1
+
+        extensions: list[int] = []
+        if pos + 2 <= len(body):
+            ext_total = struct.unpack_from("!H", body, pos)[0]
+            pos += 2
+            ext_end = pos + ext_total
+            while pos + 4 <= ext_end:
+                ext_type = struct.unpack_from("!H", body, pos)[0]
+                ext_len = struct.unpack_from("!H", body, pos + 2)[0]
+                pos += 4 + ext_len
+                if not _is_grease(ext_type):
+                    extensions.append(ext_type)
+
+        return {
+            "tls_version": tls_version,
+            "cipher_suite": cipher_suite,
+            "extensions": extensions,
+        }
+
+    except Exception:
+        return None
+
+
+# ─── JA3 / JA3S computation ───────────────────────────────────────────────────
+
+def _tls_version_str(version: int) -> str:
+    return {
+        0x0301: "TLS 1.0",
+        0x0302: "TLS 1.1",
+        0x0303: "TLS 1.2",
+        0x0304: "TLS 1.3",
+        0x0200: "SSL 2.0",
+        0x0300: "SSL 3.0",
+    }.get(version, f"0x{version:04x}")
+
+
+def _ja3(ch: dict[str, Any]) -> tuple[str, str]:
+    """Return (ja3_string, ja3_hash) for a parsed ClientHello."""
+    parts = [
+        str(ch["tls_version"]),
+        "-".join(str(c) for c in ch["cipher_suites"]),
+        "-".join(str(e) for e in ch["extensions"]),
+        "-".join(str(g) for g in ch["supported_groups"]),
+        "-".join(str(p) for p in ch["ec_point_formats"]),
+    ]
+    ja3_str = ",".join(parts)
+    return ja3_str, hashlib.md5(ja3_str.encode()).hexdigest()
+
+
+def _ja3s(sh: dict[str, Any]) -> tuple[str, str]:
+    """Return (ja3s_string, ja3s_hash) for a parsed ServerHello."""
+    parts = [
+        str(sh["tls_version"]),
+        str(sh["cipher_suite"]),
+        "-".join(str(e) for e in sh["extensions"]),
+    ]
+    ja3s_str = ",".join(parts)
+    return ja3s_str, hashlib.md5(ja3s_str.encode()).hexdigest()
+
+
+# ─── Session cleanup ─────────────────────────────────────────────────────────
+
+def _cleanup_sessions() -> None:
+    now = time.monotonic()
+    stale = [k for k, ts in _session_ts.items() if now - ts > _SESSION_TTL]
+    for k in stale:
+        _sessions.pop(k, None)
+        _session_ts.pop(k, None)
+
+
+# ─── Logging helpers ─────────────────────────────────────────────────────────
+
+def _log(event_type: str, severity: int = SEVERITY_INFO, **fields: Any) -> None:
+    line = syslog_line(SERVICE_NAME, NODE_NAME, event_type, severity=severity, **fields)
+    write_syslog_file(line)
+
+
+# ─── Packet callback ─────────────────────────────────────────────────────────
+
+def _on_packet(pkt: Any) -> None:
+    if not (pkt.haslayer(IP) and pkt.haslayer(TCP)):
+        return
+
+    ip = pkt[IP]
+    tcp = pkt[TCP]
+
+    payload = bytes(tcp.payload)
+    if not payload:
+        return
+
+    src_ip: str = ip.src
+    dst_ip: str = ip.dst
+    src_port: int = tcp.sport
+    dst_port: int = tcp.dport
+
+    # TLS record check
+    if payload[0] != _TLS_RECORD_HANDSHAKE:
+        return
+
+    # Attempt ClientHello parse
+    ch = _parse_client_hello(payload)
+    if ch is not None:
+        _cleanup_sessions()
+
+        key = (src_ip, src_port, dst_ip, dst_port)
+        ja3_str, ja3_hash = _ja3(ch)
+
+        _sessions[key] = {
+            "ja3": ja3_hash,
+            "ja3_str": ja3_str,
+            "tls_version": ch["tls_version"],
+            "cipher_suites": ch["cipher_suites"],
+            "extensions": ch["extensions"],
+            "sni": ch["sni"],
+            "alpn": ch["alpn"],
+        }
+        _session_ts[key] = time.monotonic()
+
+        _log(
+            "tls_client_hello",
+            src_ip=src_ip,
+            src_port=str(src_port),
+            dst_ip=dst_ip,
+            dst_port=str(dst_port),
+            ja3=ja3_hash,
+            tls_version=_tls_version_str(ch["tls_version"]),
+            sni=ch["sni"] or "",
+            alpn=",".join(ch["alpn"]),
+            raw_ciphers="-".join(str(c) for c in ch["cipher_suites"]),
+            raw_extensions="-".join(str(e) for e in ch["extensions"]),
+        )
+        return
+
+    # Attempt ServerHello parse
+    sh = _parse_server_hello(payload)
+    if sh is not None:
+        # Reverse 4-tuple to find the matching ClientHello
+        rev_key = (dst_ip, dst_port, src_ip, src_port)
+        ch_data = _sessions.pop(rev_key, None)
+        _session_ts.pop(rev_key, None)
+
+        ja3s_str, ja3s_hash = _ja3s(sh)
+
+        fields: dict[str, Any] = {
+            "src_ip": dst_ip,   # original attacker is now the destination
+            "src_port": str(dst_port),
+            "dst_ip": src_ip,
+            "dst_port": str(src_port),
+            "ja3s": ja3s_hash,
+            "tls_version": _tls_version_str(sh["tls_version"]),
+        }
+
+        if ch_data:
+            fields["ja3"] = ch_data["ja3"]
+            fields["sni"] = ch_data["sni"] or ""
+            fields["alpn"] = ",".join(ch_data["alpn"])
+            fields["raw_ciphers"] = "-".join(str(c) for c in ch_data["cipher_suites"])
+            fields["raw_extensions"] = "-".join(str(e) for e in ch_data["extensions"])
+
+        _log("tls_session", severity=SEVERITY_WARNING, **fields)
+
+
+# ─── Entry point ─────────────────────────────────────────────────────────────
+
+if __name__ == "__main__":
+    _log("startup", msg=f"sniffer started node={NODE_NAME}")
+    sniff(
+        filter="tcp",
+        prn=_on_packet,
+        store=False,
+    )
diff --git a/tests/test_attacker_worker.py b/tests/test_attacker_worker.py
new file mode 100644
index 0000000..57f44fe
--- /dev/null
+++ b/tests/test_attacker_worker.py
@@ -0,0 +1,515 @@
+"""
+Tests for decnet/web/attacker_worker.py
+
+Covers:
+- _rebuild(): CorrelationEngine integration, traversal detection, upsert calls
+- _extract_commands(): command harvesting from raw log rows
+- _build_record(): record assembly from engine events + bounties
+- _first_contact_deckies(): ordering for single-decky attackers
+- attacker_profile_worker(): cancellation and error handling
+"""
+
+from __future__ import annotations
+
+import asyncio
+import json
+from datetime import datetime, timezone
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from decnet.logging.syslog_formatter import SEVERITY_INFO, format_rfc5424
+from decnet.web.attacker_worker import (
+    _build_record,
+    _extract_commands,
+    _first_contact_deckies,
+    _rebuild,
+    attacker_profile_worker,
+)
+from decnet.correlation.parser import LogEvent
+
+# ─── Helpers ──────────────────────────────────────────────────────────────────
+
+_TS1 = "2026-04-04T10:00:00+00:00"
+_TS2 = "2026-04-04T10:05:00+00:00"
+_TS3 = "2026-04-04T10:10:00+00:00"
+
+_DT1 = datetime.fromisoformat(_TS1)
+_DT2 = datetime.fromisoformat(_TS2)
+_DT3 = datetime.fromisoformat(_TS3)
+
+
+def _make_raw_line(
+    service: str = "ssh",
+    hostname: str = "decky-01",
+    event_type: str = "connection",
+    src_ip: str = "1.2.3.4",
+    timestamp: str = _TS1,
+    **extra: str,
+) -> str:
+    return format_rfc5424(
+        service=service,
+        hostname=hostname,
+        event_type=event_type,
+        severity=SEVERITY_INFO,
+        timestamp=datetime.fromisoformat(timestamp),
+        src_ip=src_ip,
+        **extra,
+    )
+
+
+def _make_log_row(
+    raw_line: str = "",
+    attacker_ip: str = "1.2.3.4",
+    service: str = "ssh",
+    event_type: str = "connection",
+    decky: str = "decky-01",
+    timestamp: datetime = _DT1,
+    fields: str = "{}",
+) -> dict:
+    if not raw_line:
+        raw_line = _make_raw_line(
+            service=service,
+            hostname=decky,
+            event_type=event_type,
+            src_ip=attacker_ip,
+            timestamp=timestamp.isoformat(),
+        )
+    return {
+        "id": 1,
+        "raw_line": raw_line,
+        "attacker_ip": attacker_ip,
+        "service": service,
+        "event_type": event_type,
+        "decky": decky,
+        "timestamp": timestamp,
+        "fields": fields,
+    }
+
+
+def _make_repo(logs=None, bounties=None):
+    repo = MagicMock()
+    repo.get_all_logs_raw = AsyncMock(return_value=logs or [])
+    repo.get_all_bounties_by_ip = AsyncMock(return_value=bounties or {})
+    repo.upsert_attacker = AsyncMock()
+    return repo
+
+
+def _make_log_event(
+    ip: str,
+    decky: str,
+    service: str = "ssh",
+    event_type: str = "connection",
+    timestamp: datetime = _DT1,
+) -> LogEvent:
+    return LogEvent(
+        timestamp=timestamp,
+        decky=decky,
+        service=service,
+        event_type=event_type,
+        attacker_ip=ip,
+        fields={},
+        raw="",
+    )
+
+
+# ─── _first_contact_deckies ───────────────────────────────────────────────────
+
+class TestFirstContactDeckies:
+    def test_single_decky(self):
+        events = [_make_log_event("1.1.1.1", "decky-01", timestamp=_DT1)]
+        assert _first_contact_deckies(events) == ["decky-01"]
+
+    def test_multiple_deckies_ordered_by_first_contact(self):
+        events = [
+            _make_log_event("1.1.1.1", "decky-02", timestamp=_DT2),
+            _make_log_event("1.1.1.1", "decky-01", timestamp=_DT1),
+        ]
+        assert _first_contact_deckies(events) == ["decky-01", "decky-02"]
+
+    def test_revisit_does_not_duplicate(self):
+        events = [
+            _make_log_event("1.1.1.1", "decky-01", timestamp=_DT1),
+            _make_log_event("1.1.1.1", "decky-02", timestamp=_DT2),
+            _make_log_event("1.1.1.1", "decky-01", timestamp=_DT3),  # revisit
+        ]
+        result = _first_contact_deckies(events)
+        assert result == ["decky-01", "decky-02"]
+        assert result.count("decky-01") == 1
+
+
+# ─── _extract_commands ────────────────────────────────────────────────────────
+
+class TestExtractCommands:
+    def _row(self, ip, event_type, fields):
+        return _make_log_row(
+            attacker_ip=ip,
+            event_type=event_type,
+            service="ssh",
+            decky="decky-01",
+            fields=json.dumps(fields),
+        )
+
+    def test_extracts_command_field(self):
+        rows = [self._row("1.1.1.1", "command", {"command": "id"})]
+        result = _extract_commands(rows, "1.1.1.1")
+        assert len(result) == 1
+        assert result[0]["command"] == "id"
+        assert result[0]["service"] == "ssh"
+        assert result[0]["decky"] == "decky-01"
+
+    def test_extracts_query_field(self):
+        rows = [self._row("2.2.2.2", "query", {"query": "SELECT * FROM users"})]
+        result = _extract_commands(rows, "2.2.2.2")
+        assert len(result) == 1
+        assert result[0]["command"] == "SELECT * FROM users"
+
+    def test_extracts_input_field(self):
+        rows = [self._row("3.3.3.3", "input", {"input": "ls -la"})]
+        result = _extract_commands(rows, "3.3.3.3")
+        assert len(result) == 1
+        assert result[0]["command"] == "ls -la"
+
+    def test_non_command_event_type_ignored(self):
+        rows = [self._row("1.1.1.1", "connection", {"command": "id"})]
+        result = _extract_commands(rows, "1.1.1.1")
+        assert result == []
+
+    def test_wrong_ip_ignored(self):
+        rows = [self._row("9.9.9.9", "command", {"command": "whoami"})]
+        result = _extract_commands(rows, "1.1.1.1")
+        assert result == []
+
+    def test_no_command_field_skipped(self):
+        rows = [self._row("1.1.1.1", "command", {"other": "stuff"})]
+        result = _extract_commands(rows, "1.1.1.1")
+        assert result == []
+
+    def test_invalid_json_fields_skipped(self):
+        row = _make_log_row(
+            attacker_ip="1.1.1.1",
+            event_type="command",
+            fields="not valid json",
+        )
+        result = _extract_commands([row], "1.1.1.1")
+        assert result == []
+
+    def test_multiple_commands_all_extracted(self):
+        rows = [
+            self._row("5.5.5.5", "command", {"command": "id"}),
+            self._row("5.5.5.5", "command", {"command": "uname -a"}),
+        ]
+        result = _extract_commands(rows, "5.5.5.5")
+        assert len(result) == 2
+        cmds = {r["command"] for r in result}
+        assert cmds == {"id", "uname -a"}
+
+    def test_timestamp_serialized_to_string(self):
+        rows = [self._row("1.1.1.1", "command", {"command": "pwd"})]
+        result = _extract_commands(rows, "1.1.1.1")
+        assert isinstance(result[0]["timestamp"], str)
+
+
+# ─── _build_record ────────────────────────────────────────────────────────────
+
+class TestBuildRecord:
+    def _events(self, ip="1.1.1.1"):
+        return [
+            _make_log_event(ip, "decky-01", "ssh", "conn", _DT1),
+            _make_log_event(ip, "decky-01", "http", "req", _DT2),
+        ]
+
+    def test_basic_fields(self):
+        events = self._events()
+        record = _build_record("1.1.1.1", events, None, [], [])
+        assert record["ip"] == "1.1.1.1"
+        assert record["event_count"] == 2
+        assert record["service_count"] == 2
+        assert record["decky_count"] == 1
+
+    def test_first_last_seen(self):
+        events = self._events()
+        record = _build_record("1.1.1.1", events, None, [], [])
+        assert record["first_seen"] == _DT1
+        assert record["last_seen"] == _DT2
+
+    def test_services_json_sorted(self):
+        events = self._events()
+        record = _build_record("1.1.1.1", events, None, [], [])
+        services = json.loads(record["services"])
+        assert sorted(services) == services
+
+    def test_no_traversal(self):
+        events = self._events()
+        record = _build_record("1.1.1.1", events, None, [], [])
+        assert record["is_traversal"] is False
+        assert record["traversal_path"] is None
+
+    def test_with_traversal(self):
+        from decnet.correlation.graph import AttackerTraversal, TraversalHop
+        hops = [
+            TraversalHop(_DT1, "decky-01", "ssh", "conn"),
+            TraversalHop(_DT2, "decky-02", "http", "req"),
+        ]
+        t = AttackerTraversal("1.1.1.1", hops)
+        events = [
+            _make_log_event("1.1.1.1", "decky-01", timestamp=_DT1),
+            _make_log_event("1.1.1.1", "decky-02", timestamp=_DT2),
+        ]
+        record = _build_record("1.1.1.1", events, t, [], [])
+        assert record["is_traversal"] is True
+        assert record["traversal_path"] == "decky-01 → decky-02"
+        deckies = json.loads(record["deckies"])
+        assert deckies == ["decky-01", "decky-02"]
+
+    def test_bounty_counts(self):
+        events = self._events()
+        bounties = [
+            {"bounty_type": "credential", "attacker_ip": "1.1.1.1"},
+            {"bounty_type": "credential", "attacker_ip": "1.1.1.1"},
+            {"bounty_type": "fingerprint", "attacker_ip": "1.1.1.1"},
+        ]
+        record = _build_record("1.1.1.1", events, None, bounties, [])
+        assert record["bounty_count"] == 3
+        assert record["credential_count"] == 2
+        fps = json.loads(record["fingerprints"])
+        assert len(fps) == 1
+        assert fps[0]["bounty_type"] == "fingerprint"
+
+    def test_commands_serialized(self):
+        events = self._events()
+        cmds = [{"service": "ssh", "decky": "decky-01", "command": "id", "timestamp": "2026-04-04T10:00:00"}]
+        record = _build_record("1.1.1.1", events, None, [], cmds)
+        parsed = json.loads(record["commands"])
+        assert len(parsed) == 1
+        assert parsed[0]["command"] == "id"
+
+    def test_updated_at_is_utc_datetime(self):
+        events = self._events()
+        record = _build_record("1.1.1.1", events, None, [], [])
+        assert isinstance(record["updated_at"], datetime)
+        assert record["updated_at"].tzinfo is not None
+
+
+# ─── _rebuild ─────────────────────────────────────────────────────────────────
+
+class TestRebuild:
+    @pytest.mark.asyncio
+    async def test_empty_logs_no_upsert(self):
+        repo = _make_repo(logs=[])
+        await _rebuild(repo)
+        repo.upsert_attacker.assert_not_awaited()
+
+    @pytest.mark.asyncio
+    async def test_single_attacker_upserted(self):
+        raw = _make_raw_line("ssh", "decky-01", "connection", "10.0.0.1", _TS1)
+        row = _make_log_row(raw_line=raw, attacker_ip="10.0.0.1")
+        repo = _make_repo(logs=[row])
+        await _rebuild(repo)
+        repo.upsert_attacker.assert_awaited_once()
+        record = repo.upsert_attacker.call_args[0][0]
+        assert record["ip"] == "10.0.0.1"
+        assert record["event_count"] == 1
+
+    @pytest.mark.asyncio
+    async def test_multiple_attackers_all_upserted(self):
+        rows = [
+            _make_log_row(
+                raw_line=_make_raw_line("ssh", "decky-01", "conn", ip, _TS1),
+                attacker_ip=ip,
+            )
+            for ip in ["1.1.1.1", "2.2.2.2", "3.3.3.3"]
+        ]
+        repo = _make_repo(logs=rows)
+        await _rebuild(repo)
+        assert repo.upsert_attacker.await_count == 3
+        upserted_ips = {c[0][0]["ip"] for c in repo.upsert_attacker.call_args_list}
+        assert upserted_ips == {"1.1.1.1", "2.2.2.2", "3.3.3.3"}
+
+    @pytest.mark.asyncio
+    async def test_traversal_detected_across_two_deckies(self):
+        rows = [
+            _make_log_row(
+                raw_line=_make_raw_line("ssh", "decky-01", "conn", "5.5.5.5", _TS1),
+                attacker_ip="5.5.5.5", decky="decky-01",
+            ),
+            _make_log_row(
+                raw_line=_make_raw_line("http", "decky-02", "req", "5.5.5.5", _TS2),
+                attacker_ip="5.5.5.5", decky="decky-02",
+            ),
+        ]
+        repo = _make_repo(logs=rows)
+        await _rebuild(repo)
+        record = repo.upsert_attacker.call_args[0][0]
+        assert record["is_traversal"] is True
+        assert "decky-01" in record["traversal_path"]
+        assert "decky-02" in record["traversal_path"]
+
+    @pytest.mark.asyncio
+    async def test_single_decky_not_traversal(self):
+        rows = [
+            _make_log_row(
+                raw_line=_make_raw_line("ssh", "decky-01", "conn", "7.7.7.7", _TS1),
+                attacker_ip="7.7.7.7",
+            ),
+            _make_log_row(
+                raw_line=_make_raw_line("http", "decky-01", "req", "7.7.7.7", _TS2),
+                attacker_ip="7.7.7.7",
+            ),
+        ]
+        repo = _make_repo(logs=rows)
+        await _rebuild(repo)
+        record = repo.upsert_attacker.call_args[0][0]
+        assert record["is_traversal"] is False
+
+    @pytest.mark.asyncio
+    async def test_bounties_merged_into_record(self):
+        raw = _make_raw_line("ssh", "decky-01", "conn", "8.8.8.8", _TS1)
+        repo = _make_repo(
+            logs=[_make_log_row(raw_line=raw, attacker_ip="8.8.8.8")],
+            bounties={"8.8.8.8": [
+                {"bounty_type": "credential", "attacker_ip": "8.8.8.8", "payload": {}},
+                {"bounty_type": "fingerprint", "attacker_ip": "8.8.8.8", "payload": {"ja3": "abc"}},
+            ]},
+        )
+        await _rebuild(repo)
+        record = repo.upsert_attacker.call_args[0][0]
+        assert record["bounty_count"] == 2
+        assert record["credential_count"] == 1
+        fps = json.loads(record["fingerprints"])
+        assert len(fps) == 1
+
+    @pytest.mark.asyncio
+    async def test_commands_extracted_during_rebuild(self):
+        raw = _make_raw_line("ssh", "decky-01", "command", "9.9.9.9", _TS1)
+        row = _make_log_row(
+            raw_line=raw,
+            attacker_ip="9.9.9.9",
+            event_type="command",
+            fields=json.dumps({"command": "cat /etc/passwd"}),
+        )
+        repo = _make_repo(logs=[row])
+        await _rebuild(repo)
+        record = repo.upsert_attacker.call_args[0][0]
+        commands = json.loads(record["commands"])
+        assert len(commands) == 1
+        assert commands[0]["command"] == "cat /etc/passwd"
+
+
+# ─── attacker_profile_worker ──────────────────────────────────────────────────
+
+class TestAttackerProfileWorker:
+    @pytest.mark.asyncio
+    async def test_worker_cancels_cleanly(self):
+        repo = _make_repo()
+        task = asyncio.create_task(attacker_profile_worker(repo))
+        await asyncio.sleep(0)
+        task.cancel()
+        with pytest.raises(asyncio.CancelledError):
+            await task
+
+    @pytest.mark.asyncio
+    async def test_worker_handles_rebuild_error_without_crashing(self):
+        repo = _make_repo()
+        _call_count = 0
+
+        async def fake_sleep(secs):
+            nonlocal _call_count
+            _call_count += 1
+            if _call_count >= 2:
+                raise asyncio.CancelledError()
+
+        async def bad_rebuild(_repo):
+            raise RuntimeError("DB exploded")
+
+        with patch("decnet.web.attacker_worker.asyncio.sleep", side_effect=fake_sleep):
+            with patch("decnet.web.attacker_worker._rebuild", side_effect=bad_rebuild):
+                with pytest.raises(asyncio.CancelledError):
+                    await attacker_profile_worker(repo)
+
+    @pytest.mark.asyncio
+    async def test_worker_calls_rebuild_after_sleep(self):
+        repo = _make_repo()
+        _call_count = 0
+
+        async def fake_sleep(secs):
+            nonlocal _call_count
+            _call_count += 1
+            if _call_count >= 2:
+                raise asyncio.CancelledError()
+
+        rebuild_calls = []
+
+        async def mock_rebuild(_repo):
+            rebuild_calls.append(True)
+
+        with patch("decnet.web.attacker_worker.asyncio.sleep", side_effect=fake_sleep):
+            with patch("decnet.web.attacker_worker._rebuild", side_effect=mock_rebuild):
+                with pytest.raises(asyncio.CancelledError):
+                    await attacker_profile_worker(repo)
+
+        assert len(rebuild_calls) >= 1
+
+
+# ─── JA3 bounty extraction from ingester ─────────────────────────────────────
+
+class TestJA3BountyExtraction:
+    @pytest.mark.asyncio
+    async def test_ja3_bounty_extracted_from_sniffer_event(self):
+        from decnet.web.ingester import _extract_bounty
+        repo = MagicMock()
+        repo.add_bounty = AsyncMock()
+        log_data = {
+            "decky": "decky-01",
+            "service": "sniffer",
+            "attacker_ip": "10.0.0.5",
+            "event_type": "tls_client_hello",
+            "fields": {
+                "ja3": "abc123def456abc123def456abc12345",
+                "ja3s": None,
+                "tls_version": "TLS 1.3",
+                "sni": "example.com",
+                "alpn": "h2",
+                "dst_port": "443",
+                "raw_ciphers": "4865-4866",
+                "raw_extensions": "0-23-65281",
+            },
+        }
+        await _extract_bounty(repo, log_data)
+        repo.add_bounty.assert_awaited_once()
+        bounty = repo.add_bounty.call_args[0][0]
+        assert bounty["bounty_type"] == "fingerprint"
+        assert bounty["payload"]["fingerprint_type"] == "ja3"
+        assert bounty["payload"]["ja3"] == "abc123def456abc123def456abc12345"
+        assert bounty["payload"]["tls_version"] == "TLS 1.3"
+        assert bounty["payload"]["sni"] == "example.com"
+
+    @pytest.mark.asyncio
+    async def test_non_sniffer_service_with_ja3_field_ignored(self):
+        from decnet.web.ingester import _extract_bounty
+        repo = MagicMock()
+        repo.add_bounty = AsyncMock()
+        log_data = {
+            "service": "http",
+            "attacker_ip": "10.0.0.6",
+            "event_type": "request",
+            "fields": {"ja3": "somehash"},
+        }
+        await _extract_bounty(repo, log_data)
+        # Credential/UA checks run, but JA3 should not fire for non-sniffer
+        calls = [c[0][0]["bounty_type"] for c in repo.add_bounty.call_args_list]
+        assert "ja3" not in str(calls)
+
+    @pytest.mark.asyncio
+    async def test_sniffer_without_ja3_no_bounty(self):
+        from decnet.web.ingester import _extract_bounty
+        repo = MagicMock()
+        repo.add_bounty = AsyncMock()
+        log_data = {
+            "service": "sniffer",
+            "attacker_ip": "10.0.0.7",
+            "event_type": "startup",
+            "fields": {"msg": "started"},
+        }
+        await _extract_bounty(repo, log_data)
+        repo.add_bounty.assert_not_awaited()
diff --git a/tests/test_base_repo.py b/tests/test_base_repo.py
index efa7787..5ba51db 100644
--- a/tests/test_base_repo.py
+++ b/tests/test_base_repo.py
@@ -21,6 +21,11 @@ class DummyRepo(BaseRepository):
     async def get_total_bounties(self, **kw): await super().get_total_bounties(**kw)
     async def get_state(self, k): await super().get_state(k)
     async def set_state(self, k, v): await super().set_state(k, v)
+    async def get_all_logs_raw(self): await super().get_all_logs_raw()
+    async def get_all_bounties_by_ip(self): await super().get_all_bounties_by_ip()
+    async def upsert_attacker(self, d): await super().upsert_attacker(d)
+    async def get_attackers(self, **kw): await super().get_attackers(**kw)
+    async def get_total_attackers(self, **kw): await super().get_total_attackers(**kw)
 
 @pytest.mark.asyncio
 async def test_base_repo_coverage():
@@ -41,3 +46,8 @@ async def test_base_repo_coverage():
     await dr.get_total_bounties()
     await dr.get_state("k")
     await dr.set_state("k", "v")
+    await dr.get_all_logs_raw()
+    await dr.get_all_bounties_by_ip()
+    await dr.upsert_attacker({})
+    await dr.get_attackers()
+    await dr.get_total_attackers()
diff --git a/tests/test_sniffer_ja3.py b/tests/test_sniffer_ja3.py
new file mode 100644
index 0000000..b0e053b
--- /dev/null
+++ b/tests/test_sniffer_ja3.py
@@ -0,0 +1,437 @@
+"""
+Unit tests for the JA3/JA3S parsing logic in templates/sniffer/server.py.
+
+Imports the parser functions directly via sys.path manipulation, with
+decnet_logging mocked out (it's a container-side stub at template build time).
+"""
+
+from __future__ import annotations
+
+import hashlib
+import struct
+import sys
+import types
+from pathlib import Path
+from unittest.mock import MagicMock
+
+import pytest
+
+# ─── Import sniffer module with mocked decnet_logging ─────────────────────────
+
+_SNIFFER_DIR = str(Path(__file__).parent.parent / "templates" / "sniffer")
+
+def _load_sniffer():
+    """Load templates/sniffer/server.py with decnet_logging stubbed out."""
+    # Stub the decnet_logging module that server.py imports
+    _stub = types.ModuleType("decnet_logging")
+    _stub.SEVERITY_INFO = 6
+    _stub.SEVERITY_WARNING = 4
+    _stub.syslog_line = MagicMock(return_value="<134>1 fake")
+    _stub.write_syslog_file = MagicMock()
+    sys.modules.setdefault("decnet_logging", _stub)
+
+    if _SNIFFER_DIR not in sys.path:
+        sys.path.insert(0, _SNIFFER_DIR)
+
+    import importlib
+    if "server" in sys.modules:
+        return sys.modules["server"]
+    import server as _srv
+    return _srv
+
+_srv = _load_sniffer()
+
+_parse_client_hello = _srv._parse_client_hello
+_parse_server_hello = _srv._parse_server_hello
+_ja3 = _srv._ja3
+_ja3s = _srv._ja3s
+_is_grease = _srv._is_grease
+_filter_grease = _srv._filter_grease
+_tls_version_str = _srv._tls_version_str
+
+
+# ─── TLS byte builder helpers ─────────────────────────────────────────────────
+
+def _build_client_hello(
+    version: int = 0x0303,
+    cipher_suites: list[int] | None = None,
+    extensions_bytes: bytes = b"",
+) -> bytes:
+    """Build a minimal valid TLS ClientHello byte sequence."""
+    if cipher_suites is None:
+        cipher_suites = [0x002F, 0x0035]  # AES-128-SHA, AES-256-SHA
+
+    random_bytes = b"\xAB" * 32
+    session_id = b"\x00"  # no session id
+    cs_bytes = b"".join(struct.pack("!H", c) for c in cipher_suites)
+    cs_len = struct.pack("!H", len(cs_bytes))
+    compression = b"\x01\x00"  # 1 method: null
+
+    if extensions_bytes:
+        ext_block = struct.pack("!H", len(extensions_bytes)) + extensions_bytes
+    else:
+        ext_block = b"\x00\x00"
+
+    body = (
+        struct.pack("!H", version)
+        + random_bytes
+        + session_id
+        + cs_len
+        + cs_bytes
+        + compression
+        + ext_block
+    )
+
+    hs_header = b"\x01" + struct.pack("!I", len(body))[1:]  # type + 3-byte len
+    record_payload = hs_header + body
+    record = b"\x16\x03\x01" + struct.pack("!H", len(record_payload)) + record_payload
+    return record
+
+
+def _build_extension(ext_type: int, data: bytes) -> bytes:
+    return struct.pack("!HH", ext_type, len(data)) + data
+
+
+def _build_sni_extension(hostname: str) -> bytes:
+    name_bytes = hostname.encode()
+    # server_name: type(1) + len(2) + name
+    entry = b"\x00" + struct.pack("!H", len(name_bytes)) + name_bytes
+    # server_name_list: len(2) + entries
+    lst = struct.pack("!H", len(entry)) + entry
+    return _build_extension(0x0000, lst)
+
+
+def _build_supported_groups_extension(groups: list[int]) -> bytes:
+    grp_bytes = b"".join(struct.pack("!H", g) for g in groups)
+    data = struct.pack("!H", len(grp_bytes)) + grp_bytes
+    return _build_extension(0x000A, data)
+
+
+def _build_ec_point_formats_extension(formats: list[int]) -> bytes:
+    pf = bytes(formats)
+    data = bytes([len(pf)]) + pf
+    return _build_extension(0x000B, data)
+
+
+def _build_alpn_extension(protocols: list[str]) -> bytes:
+    proto_bytes = b""
+    for p in protocols:
+        pb = p.encode()
+        proto_bytes += bytes([len(pb)]) + pb
+    data = struct.pack("!H", len(proto_bytes)) + proto_bytes
+    return _build_extension(0x0010, data)
+
+
+def _build_server_hello(
+    version: int = 0x0303,
+    cipher_suite: int = 0x002F,
+    extensions_bytes: bytes = b"",
+) -> bytes:
+    random_bytes = b"\xCD" * 32
+    session_id = b"\x00"
+    compression = b"\x00"
+
+    if extensions_bytes:
+        ext_block = struct.pack("!H", len(extensions_bytes)) + extensions_bytes
+    else:
+        ext_block = b"\x00\x00"
+
+    body = (
+        struct.pack("!H", version)
+        + random_bytes
+        + session_id
+        + struct.pack("!H", cipher_suite)
+        + compression
+        + ext_block
+    )
+
+    hs_header = b"\x02" + struct.pack("!I", len(body))[1:]
+    record_payload = hs_header + body
+    return b"\x16\x03\x01" + struct.pack("!H", len(record_payload)) + record_payload
+
+
+# ─── GREASE tests ─────────────────────────────────────────────────────────────
+
+class TestGrease:
+    def test_known_grease_values_detected(self):
+        for v in [0x0A0A, 0x1A1A, 0x2A2A, 0x3A3A, 0x4A4A, 0x5A5A,
+                  0x6A6A, 0x7A7A, 0x8A8A, 0x9A9A, 0xAAAA, 0xBABA,
+                  0xCACA, 0xDADA, 0xEAEA, 0xFAFA]:
+            assert _is_grease(v), f"0x{v:04x} should be GREASE"
+
+    def test_non_grease_values_not_detected(self):
+        for v in [0x002F, 0x0035, 0x1301, 0x000A, 0xFFFF]:
+            assert not _is_grease(v), f"0x{v:04x} should not be GREASE"
+
+    def test_filter_grease_removes_grease(self):
+        values = [0x0A0A, 0x002F, 0x1A1A, 0x0035]
+        result = _filter_grease(values)
+        assert result == [0x002F, 0x0035]
+
+    def test_filter_grease_preserves_all_non_grease(self):
+        values = [0x002F, 0x0035, 0x1301]
+        assert _filter_grease(values) == values
+
+
+# ─── ClientHello parsing tests ────────────────────────────────────────────────
+
+class TestParseClientHello:
+    def test_minimal_client_hello_parsed(self):
+        data = _build_client_hello()
+        result = _parse_client_hello(data)
+        assert result is not None
+        assert result["tls_version"] == 0x0303
+        assert result["cipher_suites"] == [0x002F, 0x0035]
+        assert result["extensions"] == []
+        assert result["supported_groups"] == []
+        assert result["ec_point_formats"] == []
+        assert result["sni"] == ""
+        assert result["alpn"] == []
+
+    def test_wrong_record_type_returns_none(self):
+        data = _build_client_hello()
+        bad = b"\x14" + data[1:]  # change record type to ChangeCipherSpec
+        assert _parse_client_hello(bad) is None
+
+    def test_wrong_handshake_type_returns_none(self):
+        data = _build_client_hello()
+        # Byte at offset 5 is the handshake type
+        bad = data[:5] + b"\x02" + data[6:]  # ServerHello type
+        assert _parse_client_hello(bad) is None
+
+    def test_too_short_returns_none(self):
+        assert _parse_client_hello(b"\x16\x03\x01") is None
+        assert _parse_client_hello(b"") is None
+
+    def test_non_tls_returns_none(self):
+        assert _parse_client_hello(b"GET / HTTP/1.1\r\n") is None
+
+    def test_grease_cipher_suites_filtered(self):
+        data = _build_client_hello(cipher_suites=[0x0A0A, 0x002F, 0x1A1A, 0x0035])
+        result = _parse_client_hello(data)
+        assert result is not None
+        assert 0x0A0A not in result["cipher_suites"]
+        assert 0x1A1A not in result["cipher_suites"]
+        assert result["cipher_suites"] == [0x002F, 0x0035]
+
+    def test_sni_extension_extracted(self):
+        ext = _build_sni_extension("example.com")
+        data = _build_client_hello(extensions_bytes=ext)
+        result = _parse_client_hello(data)
+        assert result is not None
+        assert result["sni"] == "example.com"
+
+    def test_supported_groups_extracted(self):
+        ext = _build_supported_groups_extension([0x001D, 0x0017, 0x0018])
+        data = _build_client_hello(extensions_bytes=ext)
+        result = _parse_client_hello(data)
+        assert result is not None
+        assert result["supported_groups"] == [0x001D, 0x0017, 0x0018]
+
+    def test_grease_in_supported_groups_filtered(self):
+        ext = _build_supported_groups_extension([0x0A0A, 0x001D])
+        data = _build_client_hello(extensions_bytes=ext)
+        result = _parse_client_hello(data)
+        assert result is not None
+        assert 0x0A0A not in result["supported_groups"]
+        assert 0x001D in result["supported_groups"]
+
+    def test_ec_point_formats_extracted(self):
+        ext = _build_ec_point_formats_extension([0x00, 0x01])
+        data = _build_client_hello(extensions_bytes=ext)
+        result = _parse_client_hello(data)
+        assert result is not None
+        assert result["ec_point_formats"] == [0x00, 0x01]
+
+    def test_alpn_extension_extracted(self):
+        ext = _build_alpn_extension(["h2", "http/1.1"])
+        data = _build_client_hello(extensions_bytes=ext)
+        result = _parse_client_hello(data)
+        assert result is not None
+        assert result["alpn"] == ["h2", "http/1.1"]
+
+    def test_multiple_extensions_extracted(self):
+        sni = _build_sni_extension("target.local")
+        grps = _build_supported_groups_extension([0x001D])
+        combined = sni + grps
+        data = _build_client_hello(extensions_bytes=combined)
+        result = _parse_client_hello(data)
+        assert result is not None
+        assert result["sni"] == "target.local"
+        assert 0x001D in result["supported_groups"]
+        # Extension type IDs recorded (SNI=0, supported_groups=10)
+        assert 0x0000 in result["extensions"]
+        assert 0x000A in result["extensions"]
+
+
+# ─── ServerHello parsing tests ────────────────────────────────────────────────
+
+class TestParseServerHello:
+    def test_minimal_server_hello_parsed(self):
+        data = _build_server_hello()
+        result = _parse_server_hello(data)
+        assert result is not None
+        assert result["tls_version"] == 0x0303
+        assert result["cipher_suite"] == 0x002F
+        assert result["extensions"] == []
+
+    def test_wrong_record_type_returns_none(self):
+        data = _build_server_hello()
+        bad = b"\x15" + data[1:]
+        assert _parse_server_hello(bad) is None
+
+    def test_wrong_handshake_type_returns_none(self):
+        data = _build_server_hello()
+        bad = data[:5] + b"\x01" + data[6:]  # ClientHello type
+        assert _parse_server_hello(bad) is None
+
+    def test_too_short_returns_none(self):
+        assert _parse_server_hello(b"") is None
+
+    def test_server_hello_extension_types_recorded(self):
+        # Build a ServerHello with a generic extension (type=0xFF01)
+        ext_data = _build_extension(0xFF01, b"\x00")
+        data = _build_server_hello(extensions_bytes=ext_data)
+        result = _parse_server_hello(data)
+        assert result is not None
+        assert 0xFF01 in result["extensions"]
+
+    def test_grease_extension_in_server_hello_filtered(self):
+        ext_data = _build_extension(0x0A0A, b"\x00")
+        data = _build_server_hello(extensions_bytes=ext_data)
+        result = _parse_server_hello(data)
+        assert result is not None
+        assert 0x0A0A not in result["extensions"]
+
+
+# ─── JA3 hash tests ───────────────────────────────────────────────────────────
+
+class TestJA3:
+    def test_ja3_returns_32_char_hex(self):
+        data = _build_client_hello()
+        ch = _parse_client_hello(data)
+        _, ja3_hash = _ja3(ch)
+        assert len(ja3_hash) == 32
+        assert all(c in "0123456789abcdef" for c in ja3_hash)
+
+    def test_ja3_known_hash(self):
+        # Minimal ClientHello: TLS 1.2, ciphers [47, 53], no extensions
+        ch = {
+            "tls_version": 0x0303,   # 771
+            "cipher_suites": [0x002F, 0x0035],  # 47, 53
+            "extensions": [],
+            "supported_groups": [],
+            "ec_point_formats": [],
+            "sni": "",
+            "alpn": [],
+        }
+        ja3_str, ja3_hash = _ja3(ch)
+        assert ja3_str == "771,47-53,,,"
+        expected = hashlib.md5(b"771,47-53,,,").hexdigest()
+        assert ja3_hash == expected
+
+    def test_ja3_same_input_same_hash(self):
+        data = _build_client_hello()
+        ch = _parse_client_hello(data)
+        _, h1 = _ja3(ch)
+        _, h2 = _ja3(ch)
+        assert h1 == h2
+
+    def test_ja3_different_ciphers_different_hash(self):
+        ch1 = {"tls_version": 0x0303, "cipher_suites": [47], "extensions": [],
+               "supported_groups": [], "ec_point_formats": [], "sni": "", "alpn": []}
+        ch2 = {"tls_version": 0x0303, "cipher_suites": [53], "extensions": [],
+               "supported_groups": [], "ec_point_formats": [], "sni": "", "alpn": []}
+        _, h1 = _ja3(ch1)
+        _, h2 = _ja3(ch2)
+        assert h1 != h2
+
+    def test_ja3_empty_lists_produce_valid_string(self):
+        ch = {"tls_version": 0x0303, "cipher_suites": [], "extensions": [],
+              "supported_groups": [], "ec_point_formats": [], "sni": "", "alpn": []}
+        ja3_str, ja3_hash = _ja3(ch)
+        assert ja3_str == "771,,,,"
+        assert len(ja3_hash) == 32
+
+
+# ─── JA3S hash tests ──────────────────────────────────────────────────────────
+
+class TestJA3S:
+    def test_ja3s_returns_32_char_hex(self):
+        data = _build_server_hello()
+        sh = _parse_server_hello(data)
+        _, ja3s_hash = _ja3s(sh)
+        assert len(ja3s_hash) == 32
+        assert all(c in "0123456789abcdef" for c in ja3s_hash)
+
+    def test_ja3s_known_hash(self):
+        sh = {"tls_version": 0x0303, "cipher_suite": 0x002F, "extensions": []}
+        ja3s_str, ja3s_hash = _ja3s(sh)
+        assert ja3s_str == "771,47,"
+        expected = hashlib.md5(b"771,47,").hexdigest()
+        assert ja3s_hash == expected
+
+    def test_ja3s_different_cipher_different_hash(self):
+        sh1 = {"tls_version": 0x0303, "cipher_suite": 0x002F, "extensions": []}
+        sh2 = {"tls_version": 0x0303, "cipher_suite": 0x0035, "extensions": []}
+        _, h1 = _ja3s(sh1)
+        _, h2 = _ja3s(sh2)
+        assert h1 != h2
+
+
+# ─── TLS version string tests ─────────────────────────────────────────────────
+
+class TestTLSVersionStr:
+    def test_tls12(self):
+        assert _tls_version_str(0x0303) == "TLS 1.2"
+
+    def test_tls13(self):
+        assert _tls_version_str(0x0304) == "TLS 1.3"
+
+    def test_tls11(self):
+        assert _tls_version_str(0x0302) == "TLS 1.1"
+
+    def test_tls10(self):
+        assert _tls_version_str(0x0301) == "TLS 1.0"
+
+    def test_unknown_version(self):
+        result = _tls_version_str(0xABCD)
+        assert "0xabcd" in result.lower()
+
+
+# ─── Full round-trip: parse bytes → JA3/JA3S ──────────────────────────────────
+
+class TestRoundTrip:
+    def test_client_hello_bytes_to_ja3(self):
+        ciphers = [0x1301, 0x1302, 0x002F]
+        sni_ext = _build_sni_extension("attacker.c2.com")
+        data = _build_client_hello(cipher_suites=ciphers, extensions_bytes=sni_ext)
+        ch = _parse_client_hello(data)
+        assert ch is not None
+        ja3_str, ja3_hash = _ja3(ch)
+        assert "4865-4866-47" in ja3_str  # ciphers: 0x1301=4865, 0x1302=4866, 0x002F=47
+        assert len(ja3_hash) == 32
+        assert ch["sni"] == "attacker.c2.com"
+
+    def test_server_hello_bytes_to_ja3s(self):
+        data = _build_server_hello(cipher_suite=0x1301)
+        sh = _parse_server_hello(data)
+        assert sh is not None
+        ja3s_str, ja3s_hash = _ja3s(sh)
+        assert "4865" in ja3s_str  # 0x1301 = 4865
+        assert len(ja3s_hash) == 32
+
+    def test_grease_client_hello_filtered_before_hash(self):
+        """GREASE ciphers must be stripped before JA3 is computed."""
+        ciphers_with_grease = [0x0A0A, 0x002F, 0xFAFA, 0x0035]
+        data = _build_client_hello(cipher_suites=ciphers_with_grease)
+        ch = _parse_client_hello(data)
+        _, ja3_hash = _ja3(ch)
+
+        # Reference: build without GREASE
+        ciphers_clean = [0x002F, 0x0035]
+        data_clean = _build_client_hello(cipher_suites=ciphers_clean)
+        ch_clean = _parse_client_hello(data_clean)
+        _, ja3_hash_clean = _ja3(ch_clean)
+
+        assert ja3_hash == ja3_hash_clean
diff --git a/tests/test_web_api.py b/tests/test_web_api.py
index 0879c23..b07a1f8 100644
--- a/tests/test_web_api.py
+++ b/tests/test_web_api.py
@@ -128,8 +128,9 @@ class TestLifespan:
         with patch("decnet.web.api.repo", mock_repo):
             with patch("decnet.web.api.log_ingestion_worker", return_value=asyncio.sleep(0)):
                 with patch("decnet.web.api.log_collector_worker", return_value=asyncio.sleep(0)):
-                    async with lifespan(mock_app):
-                        mock_repo.initialize.assert_awaited_once()
+                    with patch("decnet.web.api.attacker_profile_worker", return_value=asyncio.sleep(0)):
+                        async with lifespan(mock_app):
+                            mock_repo.initialize.assert_awaited_once()
 
     @pytest.mark.asyncio
     async def test_lifespan_db_retry(self):
@@ -150,5 +151,6 @@ class TestLifespan:
             with patch("decnet.web.api.asyncio.sleep", new_callable=AsyncMock):
                 with patch("decnet.web.api.log_ingestion_worker", return_value=asyncio.sleep(0)):
                     with patch("decnet.web.api.log_collector_worker", return_value=asyncio.sleep(0)):
-                        async with lifespan(mock_app):
-                            assert _call_count == 3
+                        with patch("decnet.web.api.attacker_profile_worker", return_value=asyncio.sleep(0)):
+                            async with lifespan(mock_app):
+                                assert _call_count == 3