Suspicious desktop.ini Action

 1title: Suspicious desktop.ini Action
 2id: 81315b50-6b60-4d8f-9928-3466e1022515
 3status: test
 4description: 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.
 5references:
 6    - https://isc.sans.edu/forums/diary/Desktopini+as+a+postexploitation+tool/25912/
 7author: Maxime Thiebaut (@0xThiebaut), Tim Shelton (HAWK.IO)
 8date: 2020-03-19
 9modified: 2022-10-07
10tags:
11    - attack.persistence
12    - attack.t1547.009
13logsource:
14    product: windows
15    category: file_event
16detection:
17    selection:
18        TargetFilename|endswith: '\desktop.ini'
19    filter_generic:
20        Image|startswith:
21            - 'C:\Windows\'
22            - 'C:\Program Files\'
23            - 'C:\Program Files (x86)\'
24    filter_jetbrains:
25        Image|endswith: '\AppData\Local\JetBrains\Toolbox\bin\7z.exe'
26        TargetFilename|contains: '\JetBrains\apps\'
27    filter_upgrade:
28        TargetFilename|startswith: 'C:\$WINDOWS.~BT\NewOS\'
29    condition: selection and not 1 of filter_*
30falsepositives:
31    - Operations performed through Windows SCCM or equivalent
32    - Read only access list authority
33level: medium