Malicious Shai-Hulud Workflow File Creation

ATT&CK techniques

Initial Access

Recon
Resource Dev
Initial Access
- T1195.002Compromise Software Supply Chain
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of a shai-hulud-workflow.yml file, the malicious GitHub Actions workflow dropped by the Shai-Hulud npm supply-chain worm to establish persistence and propagate through developer repositories. The distinctive filename is a reliable indicator of compromise.

Reporting behind it

Related detections9 linkedT1195.002 — drag to rearrange

Malicious OSX Proton Malware Persistence Artifacts (via file_event)

Malicious Shai-Hulud Self-Hosted GitHub Runner Registration via Process Creation

Suspicious Google Workspace OAuth Authorization for Chrome Web Store Scope via Token Audit

Malicious Shai-Hulud npm Worm Marker via SHA1HULUD Process Name (via process_creation)

Malicious Shai-Hulud Self-Hosted GitHub Actions Runner Named SHA1HULUD (via process_creation)

Suspicious npm Package Spawning cURL Download via Process Creation

Suspicious Child Process Spawned by Notepad++ Updater GUP

Suspicious Execution From Hidden fonts-unix Directory in tmp on Linux

Suspicious Malicious MCP Package devtools-assistant Execution (via process_creation)

Malicious Shai-Hulud Workflow File Creation

Pivot detection · T1195.002 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →