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: 2022/10/09
10tags:
11    - attack.defense_evasion
12    - attack.privilege_escalation
13    - attack.t1548.002
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection1:
19        CommandLine|startswith: '"C:\Windows\system32\wusa.exe"  /quiet C:\Users\'
20        CommandLine|endswith: '\AppData\Local\Temp\update.msu'
21        IntegrityLevel:
22            - 'High'
23            - 'System'
24    selection2:
25        ParentCommandLine: '"C:\Windows\system32\dism.exe" /online /quiet /norestart /add-package /packagepath:"C:\Windows\system32\pe386" /ignorecheck'
26        IntegrityLevel:
27            - 'High'
28            - 'System'
29        CommandLine|contains|all:
30            - 'C:\Users\'
31            - '\AppData\Local\Temp\'
32            - '\dismhost.exe {'
33        Image|endswith: '\DismHost.exe'
34    condition: 1 of selection*
35falsepositives:
36    - Unknown
37level: high