Malicious Shai-Hulud Self-Hosted GitHub Runner Registration via Process 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 registration of a rogue self-hosted GitHub Actions runner using the runner.listener binary with unattended flags and the SHA1HULUD name marker tied to the second-wave Shai-Hulud supply chain worm. Attackers register malicious runners to obtain persistent code execution inside CI/CD pipelines and spread across repositories, enabling mass credential theft and downstream package poisoning.

Reporting behind it

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

Pivot detection · T1195.002 · 9 related

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