Potential appverifUI.DLL Sideloading

 1title: Potential appverifUI.DLL Sideloading
 2id: ee6cea48-c5b6-4304-a332-10fc6446f484
 3status: test
 4description: Detects potential DLL sideloading of "appverifUI.dll"
 5references:
 6    - https://web.archive.org/web/20220519091349/https://fatrodzianko.com/2020/02/15/dll-side-loading-appverif-exe/
 7author: X__Junior (Nextron Systems)
 8date: 2023-06-20
 9tags:
10    - attack.persistence
11    - attack.privilege-escalation
12    - attack.execution
13    - attack.stealth
14    - attack.t1574.001
15logsource:
16    category: image_load
17    product: windows
18detection:
19    selection:
20        ImageLoaded|endswith: '\appverifUI.dll'
21    filter_main_legit_path:
22        Image:
23            - 'C:\Windows\SysWOW64\appverif.exe'
24            - 'C:\Windows\System32\appverif.exe'
25        ImageLoaded|startswith:
26            - 'C:\Windows\System32\'
27            - 'C:\Windows\SysWOW64\'
28            - 'C:\Windows\WinSxS\'
29    condition: selection and not 1 of filter_main_*
30falsepositives:
31    - Unlikely
32level: high