UAC Bypass Using NTFS Reparse Point - Process

 1title: UAC Bypass Using NTFS Reparse Point - Process
 2id: 39ed3c80-e6a1-431b-9df3-911ac53d08a7
 3status: test
 4description: Detects the pattern of UAC Bypass using NTFS reparse point and wusa.exe DLL hijacking (UACMe 36)
 5references:
 6    - https://github.com/hfiref0x/UACME
 7author: Christian Burkard (Nextron Systems)
 8date: 2021-08-30
 9modified: 2024-12-01
10tags:
11    - attack.privilege-escalation
12    - attack.t1548.002
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection1:
18        CommandLine|startswith: '"C:\Windows\system32\wusa.exe"  /quiet C:\Users\'
19        CommandLine|endswith: '\AppData\Local\Temp\update.msu'
20        IntegrityLevel:
21            - 'High'
22            - 'System'
23            - 'S-1-16-16384' # System
24            - 'S-1-16-12288' # High
25    selection2:
26        ParentCommandLine: '"C:\Windows\system32\dism.exe" /online /quiet /norestart /add-package /packagepath:"C:\Windows\system32\pe386" /ignorecheck'
27        IntegrityLevel:
28            - 'High'
29            - 'System'
30        CommandLine|contains|all:
31            - 'C:\Users\'
32            - '\AppData\Local\Temp\'
33            - '\dismhost.exe {'
34        Image|endswith: '\DismHost.exe'
35    condition: 1 of selection*
36falsepositives:
37    - Unknown
38level: high