Shai-Hulud Malicious GitHub Workflow Creation

title: Shai-Hulud Malicious GitHub Workflow Creation
id: 0aba5685-6db6-486f-88ef-29a99c545cfd
status: experimental
description: Detects creation of shai-hulud-workflow.yml file associated with Shai Hulud worm targeting NPM supply chain attack that exfiltrates GitHub secrets
references:
    - https://www.safetycli.com/blog/shai-hulud-npm-attack-runs-malicious-github-action
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-09-24
modified: 2026-01-24
tags:
    - attack.persistence
    - attack.credential-access
    - attack.t1552.001
    - attack.collection
    - attack.t1119
    - detection.emerging-threats
logsource:
    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
falsepositives:
    - Unlikely
level: high