Inputs
hashes, files, directories (recursive), or stdin (-). Files are hashed with MD5, SHA1, SHA256 and SHA512 in one streaming pass, and all four are matched.
GitHub Packages · MIT · Node ≥ 18
hash-sentinel
Check file hashes against your own threat feeds, MISP and optional public lookups, offline-first.
Hash lookup CLI: hash files or take MD5/SHA1/SHA256/SHA512 values and check them offline against self-hosted feeds (hash lists, CSV, MISP events and MISP feed directories, cached URL feeds) and optionally CIRCL hashlookup (no key), MalwareBazaar or VirusTotal. Zero deps.
1 Point the
@mrlouiswrightscope at GitHub Packages in.npmrc@mrlouiswright:registry=https://npm.pkg.github.com2 Install
npm i -D @mrlouiswright/hash-sentinel
Installing from GitHub Packages needs a token
Published to GitHub Packages, not npmjs.com. GitHub Packages needs a GitHub token with read:packages to install, even for public packages: add //npm.pkg.github.com/:_authToken=${GITHUB_TOKEN} to .npmrc or run npm login --registry=https://npm.pkg.github.com.
$ npx hash-sentinel sample.txt --feed feed.txthash-sentinel — 1 target(s) sample.txt status: malicious sha256: 8693a2ad77b10798f5a4c4d3574de815797a8d1139df9b56e9a58dcd432ec145 CRITICAL Known malicious: feed.txt: example-malware-family [known-malicious] ↳ 8693a2ad77b10798f5a4c4d3574de815797a8d1139df9b56e9a58dcd432ec145 ↳ fix: Quarantine the file, block the hash and investigate where it came from. 1 critical✖ Failing (fail-on: high).
Why it exists
hash-sentinel takes MD5/SHA1/SHA256/SHA512 values, or files and directories that it hashes locally, and checks them against self-hosted feeds you control: plain hash lists, sha256sum output, CSV exports (such as MalwareBazaar's), MISP events, MISP REST search results and MISP feed directories, and URL feeds that are cached locally. Optionally it asks CIRCL hashlookup (no API key; it knows millions of good files from NSRL and flags known-malicious ones), MalwareBazaar (free abuse.ch Auth-Key) and VirusTotal (API key).
CLI, library and GitHub Action. Node.js 18+, zero runtime dependencies. Files are hashed locally and never uploaded. Online lookups are opt-in and send only the hash.
Features
Feed formats
(auto-detected):
Known-good lists
(--known-good) for golden images or allow-listed tools. A hash that is both known-good and on a malicious feed raises known-good-conflict (a false positive, or a trojanised copy).
Online sources
(--online circl,malwarebazaar,virustotal): CIRCL hashlookup needs no key and returns NSRL known-good data plus a KnownMalicious flag. MalwareBazaar uses ABUSECH_AUTH_KEY (free at auth.abuse.ch). VirusTotal uses VT_API_KEY and counts 3 or more engines as malicious. Missing keys are reported as skipped, not failures. Lookups run 4 at a time with a 15 s timeout.
Usage
# Example
npx hash-sentinel 275a021bbfb6489e54d471899f7db9d1663fc695ec2fe2a2c4538aabf651fd0f --feed intel/hashes.txt# Example
npx hash-sentinel ./downloads --feed misp-feed/ --feed https://intel.example.net/sha256.txt --online circlCI / GitHub Action
permissions:
contents: read
security-events: write # only for the SARIF upload
steps:
- uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
with: { persist-credentials: false }
- uses: MrLouisWright/hash-sentinel@v1
with:
targets: 'downloads/'
fail-on: high
sarif: hash-sentinel.sarif
- uses: github/codeql-action/upload-sarif@v3
if: always()
with: { sarif_file: hash-sentinel.sarif }Options & flags
| Flag | Description |
|---|---|
--feed <src> | Hash list, CSV (e.g. MalwareBazaar export), MISP event JSON, MISP feed |
--known-good <src> | Known-good hash list(s) (e.g. your golden images) |
--ttl <seconds> | URL feed cache lifetime (default 21600) |
--offline | Never touch the network (cached URL feeds only) |
--online <list> | circl, malwarebazaar, virustotal |
-f table | One line per input: status, target, label |
| Policy and output | |
-c, --config <file> | JSON config (default .hash-sentinel.json if present) |
-f, --format <fmt> | text (default) | json | sarif | markdown |
--json/--sarif/--markdown <file> | Also write that format to a file |
--fail-on <sev> | critical | high | medium | low | info | none (default high) |
--list-rules | Print rules and default severities |
--no-color | Disable colours |
Full reference, config file format and API in the README.
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