Sigma rule: PUA - TruffleHog Execution - Linux

Rule

Title

PUA - TruffleHog Execution - Linux

Status

experimental

Level

medium

Author

Swachchhanda Shrawan Poudel (Nextron Systems)

Date

2025-09-24

File

rules/linux/process_creation/proc_creation_lnx_pua_trufflehog.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects execution of TruffleHog, a tool used to search for secrets in different platforms like Git, Jira, Slack, SharePoint, etc. that could be used maliciously.
While it is a legitimate tool, intended for use in CI pipelines and security assessments,
It was observed in the Shai-Hulud malware campaign targeting npm packages to steal sensitive information.

Log source

product

linux

category

process_creation

Detection

selection_img:
    Image|endswith: '/trufflehog'
selection_cli_platform:
    CommandLine|contains:
        - ' docker --image '
        - ' Git '
        - ' GitHub '
        - ' Jira '
        - ' Slack '
        - ' Confluence '
        - ' SharePoint '
        - ' s3 '
        - ' gcs '
selection_cli_verified:
    CommandLine|contains: ' --results=verified'
condition: selection_img or all of selection_cli_*

False positives (as the rule lists them)

• Legitimate use of TruffleHog by security teams or developers.

Tags

• attack.discovery
• attack.credential-access
• attack.t1083
• attack.t1552.001

MITRE ATT&CK ids this rule names

• T1083
• T1552.001

Related rules

• 44030449-b0df-4c94-aae1-502359ab28ee (similar)

References

• https://github.com/trufflesecurity/trufflehog
• https://www.getsafety.com/blog-posts/shai-hulud-npm-attack

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/process_creation/proc_creation_lnx_pua_trufflehog.yml