WSL Process Execution of Kali Linux on Windows

title: WSL Process Execution of Kali Linux on Windows
id: f9046ee0-eba9-4cb8-8592-460d56ce65eb
status: experimental
description: This rule identifies Windows Subsystem for Linux activity related to Kali Linux by matching process image paths and names associated with Kali WSL distributions and executables. Attackers may use Kali within WSL to run reconnaissance, tooling, or follow-on commands from a Windows host while blending into legitimate development/admin environments. It relies on Windows process creation telemetry, specifically Image, ParentImage, and CommandLine fields that include Kali WSL paths and identifiers.
references:
  - https://medium.com/@redfanatic7/running-kali-linux-on-windows-51ad95166e6e
  - https://learn.microsoft.com/en-us/windows/wsl/install
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_wsl_kali_linux_usage.yml
author: Swachchhanda Shrawan Poudel (Nextron Systems), Huntrule Team
date: 2025-10-10
tags:
  - attack.stealth
  - attack.t1202
logsource:
  category: process_creation
  product: windows
detection:
  selection_img_appdata:
    - Image|contains|all:
        - :\Users\
        - \AppData\Local\packages\KaliLinux
    - Image|contains|all:
        - :\Users\
        - \AppData\Local\Microsoft\WindowsApps\kali.exe
  selection_img_windowsapps:
    Image|contains: :\Program Files\WindowsApps\KaliLinux.
    Image|endswith: \kali.exe
  selection_kali_wsl_parent:
    ParentImage|endswith:
      - \wsl.exe
      - \wslhost.exe
  selection_kali_wsl_child:
    - Image|contains:
        - \kali.exe
        - \KaliLinux
    - CommandLine|contains:
        - Kali.exe
        - Kali-linux
        - kalilinux
  filter_main_install_uninstall:
    CommandLine|contains:
      - " -i "
      - " --install "
      - " --unregister "
  condition: 1 of selection_img_* or all of selection_kali_* and not 1 of filter_main_*
falsepositives:
  - Legitimate installation or usage of Kali Linux WSL by administrators or security teams
level: high
license: DRL-1.1
related:
  - id: 6f1a11aa-4b8a-4b7f-9e13-4d3e4ff0e0d4
    type: derived