Detection rules › Sigma
UAC Bypass Abusing Winsat Path Parsing - File
Detects the pattern of UAC Bypass using a path parsing issue in winsat.exe (UACMe 52)
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Privilege Escalation | T1548.002 Abuse Elevation Control Mechanism: Bypass User Account Control |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 11 | FileCreate |
Rule body yaml
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
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
TargetFilename|startswith: 'C:\Users\'
TargetFilename|endswith:
- '\AppData\Local\Temp\system32\winsat.exe'
- '\AppData\Local\Temp\system32\winmm.dll'
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.
| Field | Kind | Values |
|---|---|---|
TargetFilename | ends_with |
|
TargetFilename | starts_with |
|