Potential appverifUI.DLL Sideloading

Title: Potential appverifUI.DLL Sideloading
Status: test
Description:Detects potential DLL sideloading of "appverifUI.dll"
References:
  -https://web.archive.org/web/20220519091349/https://fatrodzianko.com/2020/02/15/dll-side-loading-appverif-exe/
Author: X__Junior (Nextron Systems)
Date: 2023-06-20
modified:None
Tags:

• -'attack.persistence'
• -'attack.privilege-escalation'
• -'attack.execution'
• -'attack.stealth'
• -'attack.t1574.001'

Logsource:

• category: image_load
• product: windows

Detection:
  selection:
    ImageLoaded|endswith: '\appverifUI.dll'
  filter_main_legit_path:
    Image:
      -'C:\Windows\SysWOW64\appverif.exe'
      -'C:\Windows\System32\appverif.exe'

    ImageLoaded|startswith:
      -'C:\Windows\System32\'
      -'C:\Windows\SysWOW64\'
      -'C:\Windows\WinSxS\'

  condition:selection and not 1 of filter_main_*
Falsepositives:
  -Unlikely
Level: high