File Deletion — Sigma Rule

Rule metadata and linked tags

Author: Ömer Günal, oscd.community. Source status: stable; severity: informational. Source dates: 2020-10-07 / 2022-09-15.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: b04df68365821d699fe47bb38276c1132199746e9941c735495b8ee9722c5906

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: File Deletion
id: 30aed7b6-d2c1-4eaf-9382-b6bc43e50c57
status: stable
description: Detects file deletion using "rm", "shred" or "unlink" commands which are used often by adversaries to delete files left behind by the actions of their intrusion activity
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.004/T1070.004.md
author: Ömer Günal, oscd.community
date: 2020-10-07
modified: 2022-09-15
tags:
    - attack.stealth
    - attack.t1070.004
logsource:
    product: linux
    category: process_creation
detection:
    selection:
        Image|endswith:
            - '/rm'     # covers /rmdir as well
            - '/shred'
            - '/unlink'
    condition: selection
falsepositives:
    - Legitimate administration activities
level: informational

Original YAML and metadata in JSON

False positives

• Legitimate administration activities

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.004/T1070.004.md