Desktop.INI Created by Uncommon Process

 Original Source: [Sigma source]
Title: Desktop.INI Created by Uncommon Process
Status: test
Description:Detects unusual processes accessing desktop.ini, which can be leveraged to alter how Explorer displays a folder's content (i.e. renaming files) without changing them on disk.
References:
  -https://isc.sans.edu/forums/diary/Desktopini+as+a+postexploitation+tool/25912/
Author: Maxime Thiebaut (@0xThiebaut), Tim Shelton (HAWK.IO)
Date: 2020-03-19
modified:2025-12-09
Tags:
  • -'attack.privilege-escalation'
  • -'attack.persistence'
  • -'attack.t1547.009'
Logsource:
  • product: windows
  • category: file_event
Detection:
  selection:
    TargetFilename|endswith: '\desktop.ini'
  filter_main_generic:
    Image|startswith:
      -'C:\Windows\'
      -'C:\Program Files\'
      -'C:\Program Files (x86)\'

  filter_main_upgrade:
    TargetFilename|startswith: 'C:\$WINDOWS.~BT\NewOS\'
  filter_optional_jetbrains:
    Image|startswith: 'C:\Users\'
    Image|endswith: '\AppData\Local\JetBrains\Toolbox\bin\7z.exe'
    TargetFilename|contains: '\JetBrains\apps\'
  filter_optional_onedrive:
    Image|startswith: 'C:\Users\'
    Image|contains: '\AppData\Local\Microsoft\OneDrive\'
  condition:selection and not 1 of filter_main_* and not 1 of filter_optional_*
Falsepositives:
  -Operations performed through Windows SCCM or equivalent
  -Read only access list authority
Level: medium