detection.wiki

Detection rules › Sigma

Screen Capture - macOS

Status
test
Severity
low
Log source
category process_creation, product macos
Author
remotephone, oscd.community
Source
github.com/SigmaHQ/sigma

Detects attempts to use screencapture to collect macOS screenshots

Known false positives

  • Legitimate user activity taking screenshots

MITRE ATT&CK coverage

TacticTechniques
Collection

Telemetry coverage

PlatformRecord / event type
macOSESF event exec (NOTIFY): Fires after execve(2) or posix_spawn(2) succeeds, delivering a post-fact record of the new process.

Rule body

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

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image: '/usr/sbin/screencapture'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Imageeq
  • /usr/sbin/screencapture
field:"Image" kind:eq value:"/usr/sbin/screencapture"