Audio Capture via PowerShell

Severity: medium
Author: E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community, Nasreddine Bencherchali (Nextron Systems)
Source: upstream

Detects audio capture via PowerShell Cmdlet.

MITRE ATT&CK coverage

Tactic	Techniques
Collection	`T1123` Audio Capture

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation
Security-Auditing	4688	A new process has been created.

Stages and Predicates

Stage 1: `selection`

or:
CommandLine|contains: 'Get-AudioDevice '
CommandLine|contains: 'Set-AudioDevice '
CommandLine|contains: Toggle-AudioDevice
CommandLine|contains: 'WindowsAudioDevice-Powershell-Cmdlet'
CommandLine|contains: 'Write-AudioDevice '

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.