sigmahighHunting

UAC Bypass Using EventVwr

Detects the pattern of a UAC bypass using Windows Event Viewer

Detection Query

selection:
  TargetFilename|endswith:
    - \Microsoft\Event Viewer\RecentViews
    - \Microsoft\EventV~1\RecentViews
filter:
  Image|startswith:
    - C:\Windows\System32\
    - C:\Windows\SysWOW64\
condition: selection and not filter

Author

Antonio Cocomazzi (idea), Florian Roth (Nextron Systems)

Created

2022-04-27

Data Sources

windowsFile Events

Platforms

windows

References

Tags

attack.privilege-escalationattack.stealth

Raw Content

title: UAC Bypass Using EventVwr
id: 63e4f530-65dc-49cc-8f80-ccfa95c69d43
status: test
description: Detects the pattern of a UAC bypass using Windows Event Viewer
references:
    - https://twitter.com/orange_8361/status/1518970259868626944?s=20&t=RFXqZjtA7tWM3HxqEH78Aw
    - https://twitter.com/splinter_code/status/1519075134296006662?s=12&t=DLUXH86WtcmG_AZ5gY3C6g
    - https://lolbas-project.github.io/lolbas/Binaries/Eventvwr/#execute
author: Antonio Cocomazzi (idea), Florian Roth (Nextron Systems)
date: 2022-04-27
modified: 2022-11-22
tags:
    - attack.privilege-escalation
    - attack.stealth
logsource:
    category: file_event
    product: windows
detection:
    selection:
        TargetFilename|endswith:
            # Removed the start just in case the logging backend doesn't expand ENV variables when they're used
            - '\Microsoft\Event Viewer\RecentViews'
            - '\Microsoft\EventV~1\RecentViews'
    filter:
        Image|startswith:
            - 'C:\Windows\System32\'
            - 'C:\Windows\SysWOW64\'
    condition: selection and not filter
falsepositives:
    - Unknown
level: high