File Download Via InstallUtil.EXE

Title: File Download Via InstallUtil.EXE
Status: test
Description:Detects use of .NET InstallUtil.exe in order to download arbitrary files. The files will be written to "%LOCALAPPDATA%\Microsoft\Windows\INetCache\IE\"
References:
  -https://github.com/LOLBAS-Project/LOLBAS/pull/239
Author: Nasreddine Bencherchali (Nextron Systems)
Date: 2022-08-19
modified:2023-11-09
Tags:

• -'attack.stealth'
• -'attack.t1218'

Logsource:

• category: process_creation
• product: windows

Detection:
  selection_img:
Image|endswith:'\InstallUtil.exe' OriginalFileName:'InstallUtil.exe'   selection_cli:
    CommandLine|contains:
      -'ftp://'
      -'http://'
      -'https://'

  condition:all of selection_*
Falsepositives:
  -Unknown
Level: medium