Suspicious Camera and Microphone Access — Sigma Rule

Rule metadata and linked tags

Author: Den Iuzvyk. Source status: test; severity: high. Source dates: 2020-06-07 / 2022-10-09.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: b979f0de76c44fdf8ecf97635bce3a46e9e7171529aa395f77783e3fafba4d92

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: Suspicious Camera and Microphone Access
id: 62120148-6b7a-42be-8b91-271c04e281a3
status: test
description: Detects Processes accessing the camera and microphone from suspicious folder
references:
    - https://medium.com/@7a616368/can-you-track-processes-accessing-the-camera-and-microphone-7e6885b37072
author: Den Iuzvyk
date: 2020-06-07
modified: 2022-10-09
tags:
    - attack.collection
    - attack.t1125
    - attack.t1123
logsource:
    category: registry_event
    product: windows
detection:
    selection_1:
        TargetObject|contains|all:
            - '\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager\ConsentStore\'
            - '\NonPackaged'
    selection_2:
        TargetObject|contains:
            - microphone
            - webcam
    selection_3:
        TargetObject|contains:
            - ':#Windows#Temp#'
            - ':#$Recycle.bin#'
            - ':#Temp#'
            - ':#Users#Public#'
            - ':#Users#Default#'
            - ':#Users#Desktop#'
    condition: all of selection_*
falsepositives:
    - Unlikely, there could be conferencing software running from a Temp folder accessing the devices
level: high

Original YAML and metadata in JSON

False positives

• Unlikely, there could be conferencing software running from a Temp folder accessing the devices

Source references

• https://medium.com/@7a616368/can-you-track-processes-accessing-the-camera-and-microphone-7e6885b37072