DllUnregisterServer Function Call Via Msiexec.EXE

Title: DllUnregisterServer Function Call Via Msiexec.EXE
Status: test
Description:Detects MsiExec loading a DLL and calling its DllUnregisterServer function
References:
  -https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1218.007/T1218.007.md
  -https://lolbas-project.github.io/lolbas/Binaries/Msiexec/
  -https://twitter.com/_st0pp3r_/status/1583914515996897281
Author: frack113
Date: 2022-04-24
modified:2024-03-13
Tags:

• -'attack.stealth'
• -'attack.t1218.007'

Logsource:

• product: windows
• category: process_creation

Detection:
  selection_img:
Image|endswith:'\msiexec.exe' OriginalFileName:'\msiexec.exe'   selection_flag:
    CommandLine|contains|windash: ' -z '
  selection_dll:
    CommandLine|contains: '.dll'
  condition:all of selection_*
Falsepositives:
  -Unknown
Level: medium