PowerShell Suspicious Script with Audio Capture Capabilities

Detects PowerShell scripts that can record audio, a common feature in popular post-exploitation tooling.

Rule type: query

Rule indices:

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Version: 2

Rule authors:

Rule license: Elastic License v2

event.category:process and
  powershell.file.script_block_text : (
    Get-MicrophoneAudio or (waveInGetNumDevs and mciSendStringA)
  )

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Collection
- ID: TA0009
- Reference URL: https://attack.mitre.org/tactics/TA0009/
Technique:
- Name: Audio Capture
- ID: T1123
- Reference URL: https://attack.mitre.org/techniques/T1123/
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/
Sub-technique:
- Name: PowerShell
- ID: T1059.001
- Reference URL: https://attack.mitre.org/techniques/T1059/001/