tabledevil
8fe7a4312d
WithSecure Labs' chainsaw — fast Sigma-based EVTX hunter, complementary
to hayabusa/zircolite (different rule engine + format).
- ubuntu:24.04 base, multi-stage (fetcher + runtime).
- Pulls latest chainsaw release tarball from GitHub at build time
(greps the API JSON because release notes contain control chars
that break jq).
- Clones SigmaHQ rules at build (chainsaw v2 dropped bundled rules).
- start.sh: chainsaw hunt /data --csv --output (CSV is mutually
exclusive with --json/--jsonl in v2.x; pick CSV for grep-ability).
- Output: /output/chainsaw_<ts>/{csv/, hunt.txt}.
- test_smoke.sh: fetch Yamato sample-evtx, scan, count detections.
- fetch-test-data.sh + .gitignore.
Validated end-to-end on amd64 Linux: 6/6 PASS, 3970 detections on
DeepBlueCLI subset.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
59 lines
1.8 KiB
Bash
Executable File
59 lines
1.8 KiB
Bash
Executable File
#!/bin/bash
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# Smoke test for chainsaw.
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#
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# Available SUBSET values: DeepBlueCLI | YamatoSecurity | EVTX-ATTACK-SAMPLES |
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# EVTX-to-MITRE-Attack | "" (full bundle).
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#
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# Env vars: TAG=ls-chainsaw:test SUBSET=DeepBlueCLI KEEP_DATA=1
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set -u
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TAG="${TAG:-ls-chainsaw:test}"
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SUBSET="${SUBSET:-DeepBlueCLI}"
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KEEP_DATA="${KEEP_DATA:-0}"
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cd "$(dirname "$0")"
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ROOT="$(pwd)"
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DATA="$ROOT/test-data/sample-evtx"
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OUT="$(mktemp -d)"
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trap 'rm -rf "$OUT"; [ "$KEEP_DATA" = 0 ] && rm -rf "$ROOT/test-data"' EXIT
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pass=0; fail=0
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ok() { echo "PASS $1"; pass=$((pass+1)); }
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bad() { echo "FAIL $1"; fail=$((fail+1)); }
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if docker image inspect "$TAG" >/dev/null 2>&1; then
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ok "image $TAG present"
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else
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bad "image $TAG not present"; exit 1
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fi
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if [ ! -d "$DATA" ]; then
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echo "Fetching sample EVTX..."
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./fetch-test-data.sh >/dev/null
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fi
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SCAN="$DATA/$SUBSET"; [ -z "$SUBSET" ] && SCAN="$DATA"
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n=$(find "$SCAN" -name "*.evtx" | wc -l | tr -d ' ')
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[ "$n" -gt 0 ] && ok "found $n EVTX in ${SUBSET:-<all>}" || { bad "no EVTX"; exit 1; }
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echo "Running chainsaw hunt..."
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if docker run --rm --network=none -v "$SCAN:/data:ro" -v "$OUT:/output" "$TAG" >"$OUT/.run.log" 2>&1; then
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ok "container exited cleanly"
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else
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bad "container non-zero"; tail -25 "$OUT/.run.log"
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fi
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run_dir=$(ls -d "$OUT"/chainsaw_* 2>/dev/null | head -1)
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[ -d "$run_dir" ] && ok "output dir created" || { bad "no chainsaw_<ts>/ dir"; }
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[ -d "$run_dir/csv" ] && ok "csv subdir present" || bad "csv/ missing"
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[ -s "$run_dir/hunt.txt" ] && ok "hunt summary saved" || bad "hunt.txt missing"
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# chainsaw prints "[+] X Detections found" — pull that.
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if [ -s "$run_dir/hunt.txt" ]; then
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hits=$(grep -oE '[0-9]+ Detections found' "$run_dir/hunt.txt" | grep -oE '[0-9]+' | head -1)
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echo
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echo "Detections: ${hits:-0}"
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fi
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echo
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echo "Summary: $pass pass, $fail fail"
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[ "$fail" -eq 0 ]
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