UAC Bypass Using NTFS Reparse Point - Process

Title: UAC Bypass Using NTFS Reparse Point - Process
Status: test
Description:Detects the pattern of UAC Bypass using NTFS reparse point and wusa.exe DLL hijacking (UACMe 36)
References:
  -https://github.com/hfiref0x/UACME
Author: Christian Burkard (Nextron Systems)
Date: 2021-08-30
modified:2024-12-01
Tags:

• -'attack.privilege-escalation'
• -'attack.t1548.002'

Logsource:

• category: process_creation
• product: windows

Detection:
  selection1:
    CommandLine|startswith: '"C:\Windows\system32\wusa.exe" /quiet C:\Users\'
    CommandLine|endswith: '\AppData\Local\Temp\update.msu'
    IntegrityLevel:
      -'High'
      -'System'
      -'S-1-16-16384'
      -'S-1-16-12288'

  selection2:
    ParentCommandLine: '"C:\Windows\system32\dism.exe" /online /quiet /norestart /add-package /packagepath:"C:\Windows\system32\pe386" /ignorecheck'
    IntegrityLevel:
      -'High'
      -'System'

    CommandLine|contains|all:
      -'C:\Users\'
      -'\AppData\Local\Temp\'
      -'\dismhost.exe {'

    Image|endswith: '\DismHost.exe'
  condition:1 of selection*
Falsepositives:
  -Unknown
Level: high