Local Groups Discovery - Linux — Sigma Rule

Rule metadata and linked tags

Author: Ömer Günal, Alejandro Ortuno, oscd.community. Source status: test; severity: low. Source dates: 2020-10-11 / 2025-06-04.

{
  "category": "process_creation",
  "product": "linux"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 82ebbe2ee4d7f5dc230b32975a007f6e2a96e00d880dc3bdddfbb6edbe3c31fb

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Local Groups Discovery - Linux
id: 676381a6-15ca-4d73-a9c8-6a22e970b90d
status: test
description: Detects enumeration of local system groups. Adversaries may attempt to find local system groups and permission settings
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1069.001/T1069.001.md
author: Ömer Günal, Alejandro Ortuno, oscd.community
date: 2020-10-11
modified: 2025-06-04
tags:
    - attack.discovery
    - attack.t1069.001
logsource:
    category: process_creation
    product: linux
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_*
falsepositives:
    - Legitimate administration activities
level: low

Original YAML and metadata in JSON

False positives

• Legitimate administration activities

Source references

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