anti
cf1e00af28
- HTTP: configurable server_header, response_code, fake_app presets (apache/nginx/wordpress/phpmyadmin/iis), extra_headers, custom_body, static files directory mount - SSH/Cowrie: configurable kernel_version, hardware_platform, ssh_banner, and users/passwords via COWRIE_USERDB_ENTRIES; switched to build mode so cowrie.cfg.j2 persona fields and userdb.txt generation work - SMTP: configurable banner and MTA hostname - MySQL: configurable version string in protocol greeting - Redis: configurable redis_version and os string in INFO response - BYOS: [custom-*] INI sections define bring-your-own Docker services - Stealth: rename all *_honeypot.py → server.py; replace HONEYPOT_NAME env var with NODE_NAME across all 22+ service templates and plugins; strip "honeypot" from all in-container file content - Config: DeckyConfig.service_config dict; INI [decky-N.svc] subsections; composer passes service_cfg to compose_fragment - 350 tests passing (100%) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
112 lines
3.5 KiB
Python
112 lines
3.5 KiB
Python
#!/usr/bin/env python3
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"""
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VNC (RFB)server.
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Performs the RFB 3.8 handshake, offers VNC authentication, captures the
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24-byte DES-encrypted challenge response, then rejects with "Authentication
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failed". Logs the raw response for offline cracking.
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"""
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import asyncio
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import json
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import os
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import socket
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from datetime import datetime, timezone
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NODE_NAME = os.environ.get("NODE_NAME", "desktop")
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LOG_TARGET = os.environ.get("LOG_TARGET", "")
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# RFB challenge — fixed so captured responses are reproducible
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_CHALLENGE = bytes(range(16)) * 1 + b"\x10\x11\x12\x13\x14\x15\x16\x17" # 24 bytes
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def _forward(event: dict) -> None:
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if not LOG_TARGET:
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return
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try:
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host, port = LOG_TARGET.rsplit(":", 1)
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with socket.create_connection((host, int(port)), timeout=3) as s:
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s.sendall((json.dumps(event) + "\n").encode())
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except Exception:
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pass
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def _log(event_type: str, **kwargs) -> None:
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event = {
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"ts": datetime.now(timezone.utc).isoformat(),
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"service": "vnc",
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"host": NODE_NAME,
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"event": event_type,
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**kwargs,
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}
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print(json.dumps(event), flush=True)
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_forward(event)
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class VNCProtocol(asyncio.Protocol):
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def __init__(self):
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self._transport = None
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self._peer = None
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self._buf = b""
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self._state = "version"
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def connection_made(self, transport):
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self._transport = transport
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self._peer = transport.get_extra_info("peername", ("?", 0))
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_log("connect", src=self._peer[0], src_port=self._peer[1])
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# Send RFB version
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transport.write(b"RFB 003.008\n")
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def data_received(self, data):
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self._buf += data
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self._process()
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def _process(self):
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if self._state == "version":
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if b"\n" not in self._buf:
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return
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line, self._buf = self._buf.split(b"\n", 1)
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client_version = line.decode(errors="replace").strip()
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_log("version", src=self._peer[0], client_version=client_version)
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# Send security types: 1 type = VNC Authentication (2)
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self._transport.write(b"\x01\x02")
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self._state = "security_choice"
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elif self._state == "security_choice":
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if len(self._buf) < 1:
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return
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chosen = self._buf[0]
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self._buf = self._buf[1:]
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_log("security_choice", src=self._peer[0], type=chosen)
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# Send 16-byte challenge
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self._transport.write(_CHALLENGE[:16])
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self._state = "auth_response"
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elif self._state == "auth_response":
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if len(self._buf) < 16:
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return
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response = self._buf[:16]
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self._buf = self._buf[16:]
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_log("auth_response", src=self._peer[0], response=response.hex())
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# SecurityResult: 1 = failed
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self._transport.write(b"\x00\x00\x00\x01")
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# Failure reason
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reason = b"Authentication failed"
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import struct
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self._transport.write(struct.pack(">I", len(reason)) + reason)
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self._transport.close()
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def connection_lost(self, exc):
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_log("disconnect", src=self._peer[0] if self._peer else "?")
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async def main():
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_log("startup", msg=f"VNC server starting as {NODE_NAME}")
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loop = asyncio.get_running_loop()
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server = await loop.create_server(VNCProtocol, "0.0.0.0", 5900)
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async with server:
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await server.serve_forever()
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if __name__ == "__main__":
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asyncio.run(main())
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