UAC Bypass Abusing Winsat Path Parsing - File

Description

Detects the pattern of UAC Bypass using a path parsing issue in winsat.exe (UACMe 52)

Query · sigma

selection:
  TargetFilename|startswith: C:\Users\
  TargetFilename|endswith:
  - \AppData\Local\Temp\system32\winsat.exe
  - \AppData\Local\Temp\system32\winmm.dll
condition: selection

Known false positives

  • Unknown
Raw source UAC Bypass Abusing Winsat Path Parsing - File · Sigma
Esc
Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: UAC Bypass Abusing Winsat Path Parsing - File
id: 155dbf56-e0a4-4dd0-8905-8a98705045e8
status: test
description: Detects the pattern of UAC Bypass using a path parsing issue in winsat.exe (UACMe 52)
references:
    - https://github.com/hfiref0x/UACME
author: Christian Burkard (Nextron Systems)
date: 2021-08-30
modified: 2022-10-09
tags:
    - attack.privilege-escalation
    - attack.t1548.002
logsource:
    category: file_event
    product: windows
detection:
    selection:
        TargetFilename|startswith: 'C:\Users\'
        TargetFilename|endswith:
            - '\AppData\Local\Temp\system32\winsat.exe'
            - '\AppData\Local\Temp\system32\winmm.dll'
    condition: selection
falsepositives:
    - Unknown
level: high

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.