Screen Capture - macOS — Sigma Rule

Rule metadata and linked tags

Author: remotephone, oscd.community. Source status: test; severity: low. Source dates: 2020-10-13 / 2021-11-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: f981cd894c5300a5d2a665121c1d206c0aad383b34b7054b04a56345c2c1bb73

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: Screen Capture - macOS
id: 0877ed01-da46-4c49-8476-d49cdd80dfa7
status: test
description: Detects attempts to use screencapture to collect macOS screenshots
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1113/T1113.md
    - https://github.com/EmpireProject/Empire/blob/08cbd274bef78243d7a8ed6443b8364acd1fc48b/lib/modules/python/collection/osx/screenshot.py
author: remotephone, oscd.community
date: 2020-10-13
modified: 2021-11-27
tags:
    - attack.collection
    - attack.t1113
logsource:
    product: macos
    category: process_creation
detection:
    selection:
        Image: '/usr/sbin/screencapture'
    condition: selection
falsepositives:
    - Legitimate user activity taking screenshots
level: low

Original YAML and metadata in JSON

False positives

• Legitimate user activity taking screenshots

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1113/T1113.md
• https://github.com/EmpireProject/Empire/blob/08cbd274bef78243d7a8ed6443b8364acd1fc48b/lib/modules/python/collection/osx/screenshot.py