feat(ttp/stix): fleet-wide STIX 2.1 export — GET /api/v1/attackers/export/stix

decnet/web/db/repository.py

@@ -1496,6 +1496,10 @@ class BaseRepository(ABC):
         """Deduplicated ``command_text`` strings for one attacker, order-preserved."""
         raise NotImplementedError
 
+    async def get_all_ttp_rollups_for_export(self) -> dict[str, list[dict[str, Any]]]:
+        """Return ``{attacker_uuid: [rollup_dict, ...]}`` for all attackers."""
+        raise NotImplementedError
+
     async def list_ttp_decky_phases(
         self, identity_uuid: str,
     ) -> list[dict[str, Any]]:

decnet/web/db/sqlmodel_repo/ttp.py

@@ -361,6 +361,41 @@ class TTPMixin(_MixinBase):
             res = await session.execute(stmt)
             return [r.model_dump(mode="json") for r in res.scalars().all()]
 
+    async def get_all_ttp_rollups_for_export(self) -> dict[str, list[dict[str, Any]]]:
+        """Return ``{attacker_uuid: [rollup_dict, ...]}`` for all attackers.
+
+        Single query; used by the fleet STIX export so it doesn't fan out
+        N × list_techniques_by_attacker calls.
+        """
+        async with self._session() as session:
+            stmt: Any = (
+                select(
+                    col(TTPTag.attacker_uuid),
+                    col(TTPTag.technique_id),
+                    col(TTPTag.sub_technique_id),
+                    func.max(col(TTPTag.tactic)).label("tactic"),
+                    func.count().label("count"),
+                    func.max(col(TTPTag.confidence)).label("confidence_max"),
+                )
+                .where(col(TTPTag.attacker_uuid).is_not(None))
+                .group_by(
+                    TTPTag.attacker_uuid,
+                    TTPTag.technique_id,
+                    TTPTag.sub_technique_id,
+                )
+            )
+            res = await session.execute(stmt)
+        out: dict[str, list[dict[str, Any]]] = {}
+        for r in res.all():
+            out.setdefault(r.attacker_uuid, []).append({
+                "technique_id": r.technique_id,
+                "sub_technique_id": r.sub_technique_id,
+                "tactic": r.tactic,
+                "count": r.count,
+                "confidence_max": r.confidence_max,
+            })
+        return out
+
     # ── Backfill iterators (E.4) ────────────────────────────────────
     #
     # Read-only iterators consumed by ``decnet ttp backfill`` to replay

decnet/web/router/__init__.py

@@ -16,6 +16,7 @@ from .stream.api_stream_events import router as stream_router
 from .attackers.api_get_attackers import router as attackers_router
 from .attackers.api_export_attackers import router as attackers_export_router
 from .attackers.api_export_attacker_stix import router as attacker_export_stix_router
+from .attackers.api_export_attackers_stix import router as attackers_export_stix_router
 from .attackers.api_events import router as attacker_events_router
 from .attackers.api_get_attacker_detail import router as attacker_detail_router
 from .attackers.api_get_attacker_commands import router as attacker_commands_router
@@ -106,6 +107,7 @@ api_router.include_router(deploy_deckies_router)
 # Attacker Profiles
 api_router.include_router(attackers_router)
 api_router.include_router(attackers_export_router)
+api_router.include_router(attackers_export_stix_router)
 api_router.include_router(attacker_export_stix_router)
 api_router.include_router(attacker_detail_router)
 api_router.include_router(attacker_events_router)

decnet/web/router/attackers/api_export_attackers_stix.py

@@ -0,0 +1,65 @@
+"""GET /api/v1/attackers/export/stix — fleet-wide STIX 2.1 bundle.
+
+Returns a self-contained STIX 2.1 Bundle covering every attacker the
+instance has observed. Attack-pattern SDOs carry canonical MITRE STIX IDs
+and are deduplicated across attackers — consumers who already have the
+public ATT&CK bundle won't accumulate duplicates.
+
+Per-tag Sightings, captured Artifacts, and SMTP targets are omitted in
+fleet mode. Use GET /api/v1/attackers/{uuid}/export/stix for full fidelity
+on a single attacker.
+"""
+from __future__ import annotations
+
+from datetime import datetime, timezone
+from typing import Any
+
+from fastapi import APIRouter, Depends
+from fastapi.responses import Response
+
+from decnet.telemetry import traced as _traced
+from decnet.ttp.stix_export import build_fleet_bundle
+from decnet.web.dependencies import require_viewer, repo
+
+router = APIRouter()
+
+
+@router.get(
+    "/attackers/export/stix",
+    tags=["Attacker Profiles"],
+    response_class=Response,
+    responses={
+        200: {
+            "content": {"application/json": {}},
+            "description": "STIX 2.1 bundle for all attackers",
+        },
+        401: {"description": "Could not validate credentials"},
+        403: {"description": "Insufficient permissions"},
+    },
+)
+@_traced("api.attackers.export_stix_fleet")
+async def api_export_attackers_stix(
+    user: dict[str, Any] = Depends(require_viewer),
+) -> Response:
+    """Download a STIX 2.1 bundle covering every observed attacker."""
+    rows, ttp_by_attacker = await _gather_fleet_data()
+    bundle = build_fleet_bundle(rows=rows, ttp_by_attacker=ttp_by_attacker)
+    ts = datetime.now(timezone.utc).strftime("%Y%m%dT%H%M%SZ")
+    return Response(
+        content=bundle.serialize(pretty=True, indent=2),
+        media_type="application/json",
+        headers={
+            "Content-Disposition": (
+                f'attachment; filename="decnet-fleet-{ts}.stix.json"'
+            ),
+        },
+    )
+
+
+async def _gather_fleet_data() -> tuple[list[dict[str, Any]], dict[str, list[dict[str, Any]]]]:
+    import asyncio
+    rows, ttp_by_attacker = await asyncio.gather(
+        repo.get_all_attackers_for_export(),
+        repo.get_all_ttp_rollups_for_export(),
+    )
+    return rows, ttp_by_attacker