proc_creation_win_lolbin_installutil_download.yml

title: Suspicious Execution of InstallUtil To Download
id: 75edd216-1939-4c73-8d61-7f3a0d85b5cc
status: experimental
description: Detects the use the .NET InstallUtil.exe application 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
tags:
    - attack.defense_evasion
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\InstallUtil.exe'
        - OriginalFileName: 'InstallUtil.exe'
    selection_cli:
        CommandLine|contains:
            - 'http://'
            - 'https://'
            - 'ftp://'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium