Possible File or Folder Permissions Change (via auditd)

This rule detects file and folder permission changes.

SigmalowLinuxv1
sigma
title: Possible File or Folder Permissions Change (via auditd)
id: ea402ec3-9dbe-5f72-96ed-50ec58a7b194
status: stable
description: This rule detects file and folder permission changes.
references:
    - https://attack.mitre.org/techniques/T1222/002/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1222.002/T1222.002.md
author: Huntrule Team
date: 2026-06-09
tags:
    - attack.defense-impairment
    - attack.t1222.002
logsource:
    product: linux
    service: auditd
detection:
    selection:
        type: 'EXECVE'
        a0|contains:
            - 'chmod'
            - 'chown'
    condition: selection
falsepositives:
    - Unknown
level: low

Known false positives

  • Unknown

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.