Sigma rule: Local Groups Discovery - Linux

Rule

Title

Local Groups Discovery - Linux

Status

test

Level

low

Author

Ömer Günal, Alejandro Ortuno, oscd.community

Date

2020-10-11

Modified

2025-06-04

File

rules/linux/process_creation/proc_creation_lnx_local_groups.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects enumeration of local system groups. Adversaries may attempt to find local system groups and permission settings

Log source

product

linux

category

process_creation

Detection

selection_1:
    Image|endswith: '/groups'
selection_2:
    Image|endswith:
        - '/cat'
        - '/ed'
        - '/head'
        - '/less'
        - '/more'
        - '/nano'
        - '/tail'
        - '/vi'
        - '/vim'
    CommandLine|contains: '/etc/group'
condition: 1 of selection_*

False positives (as the rule lists them)

• Legitimate administration activities

Tags

• attack.discovery
• attack.t1069.001

MITRE ATT&CK ids this rule names

• T1069.001

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1069.001/T1069.001.md

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_local_groups.yml