UAC Bypass Using Windows Media Player - Process

Description

Detects the pattern of UAC Bypass using Windows Media Player osksupport.dll (UACMe 32)

Query · sigma

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
  - S-1-16-12288
condition: 1 of selection_img_* and selection_integrity

Known false positives

  • Unknown
Raw source UAC Bypass Using Windows Media Player - Process · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
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

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