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title: UAC Bypass via Event Viewer
status: experimental
description: Detects UAC bypass method using Windows event viewer
references:
- https://enigma0x3.net/2016/08/15/fileless-uac-bypass-using-eventvwr-exe-and-registry-hijacking/
- https://www.hybrid-analysis.com/sample/e122bc8bf291f15cab182a5d2d27b8db1e7019e4e96bb5cdbd1dfe7446f3f51f?environmentId=100
author: Florian Roth
logsource:
product: windows
service: sysmon
detection:
methregistry:
EventID: 13
TargetObject: 'HKEY_USERS\\*\mscfile\shell\open\command'
methprocess:
EventID: 1 # Migration to process_creation requires multipart YAML
ParentImage: '*\eventvwr.exe'
filterprocess:
Image: '*\mmc.exe'
condition: methregistry or ( methprocess and not filterprocess )
fields:
- CommandLine
- ParentCommandLine
tags:
- attack.defense_evasion
- attack.privilege_escalation
- attack.t1088
- car.2019-04-001
falsepositives:
- unknown
level: critical
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