Spoor

Spoor

> An autonomous DFIR agent that follows the forensic trail an intruder leaves behind — and runs it to ground.

Spoor drives SANS SIFT forensic tooling (Volatility 3, Sleuth Kit, RegRipper, plaso, YARA) through a purpose-built MCP server, orchestrated by a LangGraph multi-agent graph — a Lead Investigator routing triage, timeline, IOC-correlation, and reporter specialists over a shared case state. Every claim it makes is either backed by a verifiable tool execution or explicitly labeled an inference — enforced in code, not in a prompt.

Built for the SANS "FIND EVIL!" hackathon (Devpost, 2026). Python · MCP · LangGraph · SIFT.

Spoor: the track or scent trail an animal leaves — you follow the spoor to hunt the quarry. Here: follow forensic artifacts to the threat.

Live proof-site → spoor.rectorspace.com — recompute Spoor's real SHA-256 audit chain in your browser, then tamper a byte and watch the verdict break. No trust required.

Why trust it? (the part that's different)

LLM agents hallucinate; incident reports can't. Spoor's answer is architectural:

| Boundary | Enforcement | Where | |---|---|---| | B1 — Path jail | every evidence path is resolved (symlinks included) and must live under the read-only evidence root | guardrails.py | | B2 — No-shell allow-list | only 7 forensic binaries can ever spawn, argv-list only — arbitrary commands are impossible by construction | guardrails.py, runner.py | | B3 — Workspace jail | tool artifacts (extractions, timelines) write only to a workspace disjoint from evidence | guardrails.py, enforced at graph build | | B4 — Approval gate | live actions call interrupt() before any side effect; only a human resume continues the graph; approve and reject are audited | orchestration/gate.py | | B5 — Tamper-evident audit | every tool call appends a hash-chained record; edits, deletions, reorders are detected by spoor verify-audit | audit.py |

On top of B5 sits the citation contract: a finding may claim confirmed only by citing a tool_call_id that exists in the verified chain. Missing or fabricated citations are downgraded to inferences — deterministically, in submit_report's implementation (orchestration/report.py). A broken chain voids every confirmed claim. The final report's own content hash is sealed onto the chain.

All five boundaries ship with bypass tests (tests/test_guardrails.py, tests/test_gate.py, tests/test_report.py) — try them live with make guardrails.

Quick start

# prereqs: uv (https://docs.astral.sh/uv/), Python 3.12+
git clone https://github.com/RECTOR-LABS/spoor && cd spoor
make install                       # deps incl. Volatility 3 (the 'forensics' extra)
cp .env.example .env               # add SPOOR_OPENROUTER_API_KEY (or OPENROUTER_API_KEY)

make test                          # 112 tests
make demo                          # full multi-agent live run (canned Case-001 demo scenario)
make verify-audit                  # prove the run's hash chain is intact

make demo exercises the complete graph — supervisor routing, real models, the citation contract, a rigged tool failure the agent must recover from — against a canned, Case-001-shaped evidence layer (no big downloads needed).

Watch it (silent walkthrough)

./scripts/demo_walkthrough.sh          # $0 — runs off the committed real run

Prints the full submission story beat-by-beat: the verdict (spoor show-report), the tamper-evident audit (spoor verify-audit), guardrail-bypass attempts that fail (spoor demo-guardrails), and the honest accuracy number. The live autonomous run is make real.

The real run (real evidence, real accuracy)

Spoor is scored against DFIR Madness Case 001 — "The Stolen Szechuan Sauce", a public intrusion case with a published answer key (see [datasets/README.md](datasets/README.md)):

# fetch the DC01 memory image (2.1GB) and verify its published MD5 — see datasets/README.md
make real

This drives real Volatility 3 over the real 2.1GB domain-controller memory capture, end to end: autonomous triage → IOC correlation → enforced report → [accuracy_report.md](accuracy_report.md) with precision/recall/F1, a hallucination rate, and an evidence-integrity proof (SHA-256 of the image before and after the run — read-only operation, demonstrated empirically).

Autonomy & self-correction

Tool failures return to the model as data (the failed call is still audited), so the agent reasons about the cause and retries — emergent behavior, not a scripted retry loop. The committed run logs show it live: vol_malfind fails, the agent finishes its sweep, comes back, retries, recovers (runs/*/audit.jsonl, seq 4–5 in the demo run). A deterministic completeness gate re-engages the supervisor on its checkpointed thread if a run ever tries to conclude without an enforced report.

The toolset (12 read-only tools, one audited spine)

| Family | Tools | Notes | |---|---|---| | Memory (Volatility 3) | vol_pslist vol_pstree vol_netscan vol_malfind vol_cmdline | pstree flattened; netscan deduped + state-filterable; all row-capped server-side | | Timeline (plaso) | log2timeline_run psort_query | build once into the workspace, slice many; events capped before they reach the model | | Disk (Sleuth Kit) | tsk_fls tsk_icat | deleted entries surfaced; extractions hashed at the moment of extraction (custody sealed) | | Registry (RegRipper) | regripper_run | hives from evidence or carved into the workspace | | Indicators | hash_file yara_scan | hashing is in-process (no subprocess, no parsing); rules live in the workspace jail |

Every tool: typed inputs → guardrails → no-shell runner → hash-chained audit record → structured JSON out.

Use it from Claude Code / any MCP client

The same tools the agents use are served over MCP (stdio):

// .mcp.json / claude_desktop_config.json
{
  "mcpServers": {
    "spoor-sift": {
      "command": "uv",
      "args": ["--directory", "/ABS/PATH/spoor", "run", "spoor-sift"],
      "env": {
        "EVIDENCE_ROOT": "/cases/case001",
        "SPOOR_WORKSPACE": "/cases/workspace",
        "SPOOR_AUDIT_PATH": "runs/audit.jsonl"
      }
    }
  }
}

Repository map

spoor_sift/
  audit.py              hash-chained, tamper-evident audit log (+ verify)
  guardrails.py         path jail · binary allow-list · workspace disjointness
  runner.py             no-shell subprocess runner (text + raw-bytes modes)
  accuracy.py           precision/recall/F1 + hallucination rate vs. an answer key
  cli.py                spoor verify-audit | demo-guardrails | accuracy-report
  server.py             spoor-sift MCP server (FastMCP, stdio)
  tools/                memory · timeline · disk · registry · indicators
  orchestration/
    supervisor.py       Lead Investigator graph (create_supervisor + checkpointer)
    agents.py           triage / timeline / ioc_correlation / reporter specialists
    report.py           the citation contract + the enforcing submit_report tool
    gate.py             interrupt() approval gate for live actions
    tools.py            typed LangChain adapters over the audited core
scripts/                live demo run · real-evidence run
datasets/               Case 001 docs, fetch instructions, verified ground truth
runs/                   committed run artifacts: audit logs, reports, tokens, transcripts
tests/                  112 tests, TDD-first (incl. guardrail bypass attempts)

Honest limitations

• Memory path is fully native (pure-Python Volatility 3). The plaso/Sleuth Kit/RegRipper

binaries ship on the SANS SIFT Workstation — on a bare laptop the timeline/disk/registry tools surface as self-correctable "binary not found" errors unless you install them.

• The committed demo run uses a canned, Case-001-shaped evidence layer to exercise the

full four-specialist graph cheaply; the real run (make real) is genuine end-to-end and produces the scored accuracy report.

• Spoor's authors are agent engineers, not career forensic analysts; the methodology encoded

in the prompts follows the SANS-published triage playbook, and accuracy is measured against a public answer key rather than asserted.

License

MIT — see [LICENSE](LICENSE).

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: RECTOR-LABS
• Source: RECTOR-LABS/spoor
• License: MIT
• Homepage: https://spoor.rectorspace.com

Install and usage instructions live in the source repository linked above.