Audio Capture via SoundRecorder — Sigma Rule

Rule metadata and linked tags

Author: E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community. Source status: test; severity: medium. Source dates: 2019-10-24 / 2021-11-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: b75cab0ef06c31dab47173e806fe27b5ef01fb5bd826256e9d1986884cffd077

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: Audio Capture via SoundRecorder
id: 83865853-59aa-449e-9600-74b9d89a6d6e
status: test
description: Detect attacker collecting audio via SoundRecorder application.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1123/T1123.md
    - https://eqllib.readthedocs.io/en/latest/analytics/f72a98cb-7b3d-4100-99c3-a138b6e9ff6e.html
author: E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community
date: 2019-10-24
modified: 2021-11-27
tags:
    - attack.collection
    - attack.t1123
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\SoundRecorder.exe'
        CommandLine|contains: '/FILE'
    condition: selection
falsepositives:
    - Legitimate audio capture by legitimate user.
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate audio capture by legitimate user.

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1123/T1123.md
• https://eqllib.readthedocs.io/en/latest/analytics/f72a98cb-7b3d-4100-99c3-a138b6e9ff6e.html