File Explorer Folder Opened Using Explorer Folder Shortcut Via Shell — Sigma Rule

Rule metadata and linked tags

Author: @Kostastsale. Source status: test; severity: high. Source dates: 2022-12-22 / 2024-08-23.

{
  "product": "windows",
  "category": "process_creation"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 946cfbe21c0d285db84e8536798b58aad86ce709d0baeac4c8c6547d65c795a9

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: File Explorer Folder Opened Using Explorer Folder Shortcut Via Shell
id: c3d76afc-93df-461e-8e67-9b2bad3f2ac4
status: test
description: |
    Detects the initial execution of "cmd.exe" which spawns "explorer.exe" with the appropriate command line arguments for opening the "My Computer" folder.
author: '@Kostastsale'
references:
    - https://ss64.com/nt/shell.html
date: 2022-12-22
modified: 2024-08-23
tags:
    - attack.discovery
    - attack.t1135
logsource:
    product: windows
    category: process_creation
detection:
    selection:
        ParentImage|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
            - '\pwsh.exe'
        Image|endswith: '\explorer.exe'
        CommandLine|contains: 'shell:mycomputerfolder'
    condition: selection
falsepositives:
    - Unknown
level: high
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_explorer_folder_shortcut_via_shell_binary/info.yml

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://ss64.com/nt/shell.html