UAC Bypass Using Windows Media Player - Process — Sigma Rule

Rule metadata and linked tags

Author: Christian Burkard (Nextron Systems). Source status: test; severity: high. Source dates: 2021-08-23 / 2024-12-01.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 40b5054c477257f94118ca0b8b2f049daa9e0b3648eff053bc6f12bbfb60fd15

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: UAC Bypass Using Windows Media Player - Process
id: 0058b9e5-bcd7-40d4-9205-95ca5a16d7b2
status: test
description: Detects the pattern of UAC Bypass using Windows Media Player osksupport.dll (UACMe 32)
references:
    - https://github.com/hfiref0x/UACME
author: Christian Burkard (Nextron Systems)
date: 2021-08-23
modified: 2024-12-01
tags:
    - attack.privilege-escalation
    - attack.t1548.002
logsource:
    category: process_creation
    product: windows
detection:
    selection_img_1:
        Image: 'C:\Program Files\Windows Media Player\osk.exe'
    selection_img_2:
        Image: 'C:\Windows\System32\cmd.exe'
        ParentCommandLine: '"C:\Windows\system32\mmc.exe" "C:\Windows\system32\eventvwr.msc" /s'
    selection_integrity:
        IntegrityLevel:
            - 'High'
            - 'System'
            - 'S-1-16-16384' # System
            - 'S-1-16-12288' # High
    condition: 1 of selection_img_* and selection_integrity
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/hfiref0x/UACME