Sigma rule: Shai-Hulud Malicious GitHub Workflow Creation

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-2a8d969f5061, updated 2026-01-24T00:00:00.000Z.

Rule

Title
Shai-Hulud Malicious GitHub Workflow Creation
Status
experimental
Level
high
Author
Swachchhanda Shrawan Poudel (Nextron Systems)
Date
2025-09-24
Modified
2026-01-24
File
rules-emerging-threats/2025/Malware/Shai-Hulud/file_event_lnx_mal_shai_hulud_workflow.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects creation of shai-hulud-workflow.yml file associated with Shai Hulud worm targeting NPM supply chain attack that exfiltrates GitHub secrets

Log source

product
linux
category
file_event

Detection

selection:
    TargetFilename|endswith:
        - '.github/workflows/shai-hulud-workflow.yaml'
        - '.github/workflows/shai-hulud-workflow.yml'
        - '.github/workflows/shai-hulud.yaml'
        - '.github/workflows/shai-hulud.yml'
condition: selection

False positives (as the rule lists them)

  • Unlikely

Tags

  • attack.persistence
  • attack.credential-access
  • attack.t1552.001
  • attack.collection
  • attack.t1119
  • detection.emerging-threats

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2025/Malware/Shai-Hulud/file_event_lnx_mal_shai_hulud_workflow.yml

Sources and licences

  • SigmaHQ

    "Shai-Hulud Malicious GitHub Workflow Creation" by Swachchhanda Shrawan Poudel (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2025/Malware/Shai-Hulud/file_event_lnx_mal_shai_hulud_workflow.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Shai-Hulud Malicious GitHub Workflow Creation",
entity page, dataset version ref-2a8d969f5061, updated 2026-01-24T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/0aba5685-6db6-486f-88ef-29a99c545cfd (accessed 2026-11-03).
Underlying source: SigmaHQ rule 0aba5685-6db6-486f-88ef-29a99c545cfd, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.