NPM Supply Chain Security Scanner

Security toolkit for detecting supply chain vulnerabilities in NPM projects, designed to detect patterns from the major 2025-2026 npm supply chain attacks:

• CVE-2025-54313 (Scavenger malware - July 2025)
• Shai-Hulud worm (September 2025) and Shai-Hulud 2.0 "The Second Coming" (November 2025)
• Mini Shai-Hulud / TeamPCP family (April-June 2026): SAP CAP, Bitwarden CLI, TanStack (CVE-2026-45321), AntV, Miasma (Red Hat), Hades (PyPI)

Purpose

Detect and notify security vulnerabilities in NPM (and now PyPI) dependencies, including:

• 1340+ compromised package versions (Shai-Hulud v1/v2 + CVE-2025-54313 + the 2026 Mini Shai-Hulud waves)
• Cross-ecosystem coverage: npm + PyPI (Hades wave), with Maven spillover documented
• Bun-runtime loaders used for EDR evasion (setup.mjs, execution.js, bw1.js, _index.js, pinned Bun v1.3.13)
• Malware persistence via agent/IDE config files (survives npm uninstall)
• OIDC / Trusted-Publishing abuse and GitHub commit-pinned tarball injection
• Shai-Hulud 2.0 Bun payloads (setup_bun.js, bun_environment.js)
• Typosquatting attempts
• Injected malicious code (DLL/SO files, obfuscated scripts)
• Suspicious installation scripts
• Worm-like/propagation behaviors
• C2 domain communication
• Cloud metadata endpoint (IMDS) access

Files

• npm-supply-chain-detector.py - Main Python detection script
• scan-npm-security.sh - Bash automation and monitoring script
• malicious-patterns.json - Malicious patterns database (production)
• shai-hulud-iocs.json - Extended IOCs database (740+ packages / 1340 versions, 29 hashes, C2 domains, 2026 Mini Shai-Hulud + PyPI Hades sections)
• update-patterns.py - Pattern database generator/updater

Installation

# Clone or download scripts
chmod +x npm-supply-chain-detector.py scan-npm-security.sh

# Check prerequisites
./scan-npm-security.sh --help

Prerequisites

• Python 3.6+
• npm/node installed
• NPM project with package.json

Usage

Simple scan

# Scan current directory
python3 npm-supply-chain-detector.py

# Scan specific project
python3 npm-supply-chain-detector.py /path/to/project

# With detailed report
python3 npm-supply-chain-detector.py -v -o markdown -f report.md

Automation script

# Basic scan
./scan-npm-security.sh

# Continuous monitoring (scan every 5 minutes)
./scan-npm-security.sh -c -i 300

# Deep scan with save
./scan-npm-security.sh -d -f security-report.md -o markdown /project

# With webhook notifications (Slack, Discord, etc.)
./scan-npm-security.sh -w https://hooks.slack.com/services/XXX

# Quarantine suspicious packages (moves to .npm-quarantine/)
./scan-npm-security.sh --quarantine

# Restore quarantined packages if false positive
./.npm-quarantine/restore.sh

Available options

Python Script (npm-supply-chain-detector.py)

• -o, --output: Output format (json, text, markdown)
• -f, --file: Save report to file
• -v, --verbose: Verbose mode
• --webhook: Webhook URL for notifications

Bash Script (scan-npm-security.sh)

• -c, --continuous: Continuous monitoring mode
• -i, --interval: Interval between scans (seconds)
• -d, --deep: Deep scan (includes npm audit, outdated packages)
• --quarantine: Move suspicious packages to quarantine folder
• --update-patterns: Update patterns from file

Quarantine Feature

The --quarantine option automatically isolates compromised packages:

How it works:

1. Scans for critical vulnerabilities
2. Identifies compromised packages from scan results
3. Moves packages from node_modules/ to .npm-quarantine/packages/
4. Creates JSON manifest with metadata (versions, paths, timestamps)
5. Generates automatic restore.sh script

Directory structure created:

.npm-quarantine/
├── packages/              # Isolated packages
│   ├── package-name/
│   └── @scope_package-name/
├── logs/                  # Scan logs
├── quarantine-manifest-*.json  # Metadata
└── restore.sh            # Restoration script

To restore (if false positive):

cd .npm-quarantine
./restore.sh              # Interactive confirmation required

Detections

1. Known compromised packages (1340 versions)

CVE-2025-54313 (Scavenger - July 2025):

• eslint-config-prettier (8.10.1, 9.1.1, 10.1.6, 10.1.7)
• eslint-plugin-prettier (4.2.2, 4.2.3)
• synckit (0.11.9)
• @pkgr/core (0.2.8)
• napi-postinstall (0.3.1)
• got-fetch (5.1.11, 5.1.12)
• is (3.3.1, 5.0.0)
• @crowdstrike/node-exporter (0.2.2)
• @crowdstrike/threat-center (1.205.2)
• tailwind-toucan-base (5.0.2)
• Shai-Hulud 2.0 (Wiz, Nov 27 2025): ~470 packages / versions (e.g. @asyncapi/*, @actbase/*, @accordproject/*, @antstackio/*, etc.) – see shai-hulud-iocs.json for the full list

Shai-Hulud worm (September 2025):

• CrowdStrike packages (@crowdstrike/*)
• @ctrl/tinycolor (4.1.1, 4.1.2)
• @nativescript-community/* packages
• @operato/* packages
• @things-factory/* packages
• Many others (see shai-hulud-iocs.json)

Shai-Hulud 2.0 (November 2025, Unit42 & Wiz)

• New payloads: setup_bun.js, bun_environment.js
• bun_environment.js hashes: 62ee164b9b306250c1172583f138c9614139264f889fa99614903c12755468d0, f099c5d9ec417d4445a0328ac0ada9cde79fc37410914103ae9c609cbc0ee068, cbb9bc5a8496243e02f3cc080efbe3e4a1430ba0671f2e43a202bf45b05479cd
• setup_bun.js hash: a3894003ad1d293ba96d77881ccd2071446dc3f65f434669b49b3da92421901a
• GitHub exfiltration: repo description "Sha1-Hulud: The Second Coming"
• Possible destructive fallback (rm -rf ~ / $HOME)

Mini Shai-Hulud / TeamPCP family (April-June 2026)

Threat actor TeamPCP (aka UNC6780), who open-sourced their "Mini Shai-Hulud" malware, triggering a cascade of waves (and copycats). All of them use a Bun loader (EDR evasion) and exfiltrate via GitHub dead-drop repositories created on the victim's own account:

Novel TTPs covered: Bun v1.3.13 runtime (evasion), persistence via agent/IDE config files (.claude/.vscode/.cursor, survives npm uninstall), OIDC/Trusted-Publishing abuse, "living-off-trusted-host" exfiltration (api.anthropic.com/v1/api, filev2.getsession.org), and destructive wipe triggered on token invalidation.

2. Typosquatting detection

• Levenshtein distance analysis
• Common substitutions (0→o, 1→i, etc.)
• Dash/underscore variations

3. Malicious code patterns

• Credential exfiltration (AWS, npm, SSH, GitHub tokens)
• Remote code execution (curl|sh, eval)
• Obfuscation (base64, atob, XOR encryption)
• Suspicious network communication to C2 domains
• Self-propagation (worm patterns, npm publishing)
• Cloud metadata endpoint (IMDS) access
• CVE-2025-54313 specific: DLL/SO loading, logDiskSpace function

4. Suspicious installation scripts

• Malicious preinstall/postinstall hooks
• Script download and execution
• npm token manipulation
• Windows DLL execution (rundll32, regsvr32)
• Malicious files: node-gyp.dll, loader.dll, version.dll

5. Hash-based detection (29 variants)

• Shai-Hulud bundle.js (7 SHA-256 hashes)
• Shai-Hulud 2.0 Bun payloads: bun_environment.js (3 hashes), setup_bun.js (1 hash)
• CVE-2025-54313 Scavenger (3 SHA-256 hashes)
  • node-gyp.dll: c68e42f416f482d43653f36cd14384270b54b68d6496a8e34ce887687de5b441
  • Scavenger stage 2: 5bed39728e404838ecd679df65048abcb443f8c7a9484702a2ded60104b8c4a9
  • install.js: 32d0dbdfef0e5520ba96a2673244267e204b94a49716ea13bf635fa9af6f66bf

6. C2 domain detection

• firebase.su (CVE-2025-54313)
• dieorsuffer.com (CVE-2025-54313)
• smartscreen-api.com (CVE-2025-54313)
• npnjs.com (typosquatting)
• webhook.site/bb8ca5f6-4175-45d2-b042-fc9ebb8170b7 (Shai-Hulud)
• t.m-kosche.com (Mini Shai-Hulud AntV C2)
• filev2.getsession.org, api.masscan.cloud, git-tanstack.com (TanStack wave)
• audit.checkmarx.cx (Bitwarden wave exfil)
• api.anthropic.com/v1/api — path-only detection (host is legitimate, abused via bogus path; never blocked outright)

7. Integrity analysis

• Verification via npm audit
• Large JS file detection (>3MB)
• npm domain validation

Report formats

JSON

{
  "scan_date": "2025-01-22T10:30:00",
  "project_path": "/path/to/project",
  "findings": [
    {
      "severity": "critical",
      "message": "KNOWN COMPROMISED PACKAGE",
      "location": "package.json",
      "details": {...}
    }
  ],
  "statistics": {
    "total_findings": 5,
    "critical": 2,
    "warning": 3
  }
}

Markdown

Formatted report with tables and structured sections.

Text

Plain text report for CI/CD integration.

Notifications

Webhook Configuration

Critical findings can be sent to a webhook:

./scan-npm-security.sh -w https://your-webhook-url

Payload format:

{
  "text": "NPM Security Alert: X critical vulnerabilities",
  "findings": [...]
}

CI/CD Integration

GitHub Actions

- name: NPM Security Scan
  run: |
    python3 npm-supply-chain-detector.py . -o json -f scan-results.json
    if [ $? -ne 0 ]; then
      echo "Critical vulnerabilities found!"
      exit 1
    fi

GitLab CI

npm-security-scan:
  script:
    - python3 npm-supply-chain-detector.py
  artifacts:
    reports:
      paths:
        - security-reports/

Jenkins

stage('Security Scan') {
    sh './scan-npm-security.sh -o json -f report.json'
}

Custom configuration

Modify malicious-patterns.json to:

• Add new compromised packages
• Define custom patterns
• Adjust notification thresholds
• Exclude false positives

Continuous monitoring

For 24/7 monitoring:

# With systemd
sudo tee /etc/systemd/system/npm-security-monitor.service << EOF
[Unit]
Description=NPM Security Monitor
After=network.target

[Service]
Type=simple
User=youruser
WorkingDirectory=/path/to/project
ExecStart=/path/to/scan-npm-security.sh -c -i 600 -w https://webhook.url
Restart=always

[Install]
WantedBy=multi-user.target
EOF

sudo systemctl enable npm-security-monitor
sudo systemctl start npm-security-monitor

What to do when detection occurs?

1. Critical findings:

   • Use quarantine mode: ./scan-npm-security.sh --quarantine
   • Immediately isolate compromised packages
   • Regenerate all exposed tokens/secrets (npm, GitHub, AWS, SSH keys)
   • Audit affected systems for credential exposure
   • Check for unauthorized GitHub repositories named "Shai-Hulud"
   • Review cloud metadata endpoint (IMDS) access logs

2. CVE-2025-54313 specific:

   • Check for malicious DLL/SO files (node-gyp.dll, loader.dll, etc.)
   • Scan for connections to C2 domains (firebase.su, dieorsuffer.com, smartscreen-api.com)
   • Windows systems: Review rundll32/regsvr32 execution logs

3. Warnings:

   • Investigate suspicious patterns
   • Verify package legitimacy before restoration
   • Update to safe versions
   • Review package maintainer changes

4. Post-incident:

   • Replace with safe package versions: npm install <package>@<safe-version>
   • npm audit fix for automatic fixes
   • Dependency review and lockfile verification
   • Set up continuous monitoring (-c -i 300)
   • Consider restoring from quarantine only after verification

References

• CrowdStrike NPM Attack 2025
• CVE-2025-54313
• CVE-2026-45321 (TanStack / Mini Shai-Hulud)
• Mini Shai-Hulud SAP CAP (StepSecurity)
• Bitwarden CLI hijack (JFrog)
• Shai-Hulud Miasma / Red Hat (Wiz)
• Shai-Hulud Hades PyPI wave (Socket)
• AntV ecosystem compromise (Socket)
• npm audit documentation

Notes

• 1340 compromised package versions tracked across npm + PyPI (updated 2026-06-08)
• 29 malware file hashes detected (Shai-Hulud v1/v2 + Scavenger + 2026 Mini Shai-Hulud waves)
• Multiple attack campaigns covered: CVE-2025-54313, Shai-Hulud v1/v2, and the 2026 Mini Shai-Hulud / TeamPCP family (CVE-2026-45321)
• Scanner designed to minimize false positives (verified against legitimate .claude/.vscode configs, clean PyPI/npm versions, real Anthropic API calls)
• Patterns based on real observed attacks (July 2025 - June 2026)
• Regular update of malicious patterns recommended
• Compatible with all standard NPM projects
• Quarantine feature allows safe isolation with restoration option

Limitations

• Does not replace thorough manual analysis
• May not detect zero-day attacks
• Performance dependent on project size
• Requires read permissions on node_modules

Contributing

To add new patterns or compromised packages:

1. Update pattern files:

   • Edit update-patterns.py to add new packages/patterns
   • Run python3 update-patterns.py to regenerate shai-hulud-iocs.json
   • Or manually edit malicious-patterns.json for quick updates

2. Test changes:

   python3 npm-supply-chain-detector.py -v test-project/
   

3. Update documentation:

   • Update statistics in README.md