Windows Binary Executed From WSL

Description

Detects the execution of Windows binaries from within a WSL instance. This could be used to masquerade parent-child relationships

Query · sigma

selection:
  Image|re: '[a-zA-Z]:\\'
  CurrentDirectory|contains: \\\\wsl.localhost
condition: selection

Known false positives

  • Unknown
Raw source Windows Binary Executed From WSL · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Windows Binary Executed From WSL
id: ed825c86-c009-4014-b413-b76003e33d35
status: test
description: |
    Detects the execution of Windows binaries from within a WSL instance.
    This could be used to masquerade parent-child relationships
references:
    - Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-02-14
tags:
    - attack.execution
    - attack.stealth
    - attack.t1202
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|re: '[a-zA-Z]:\\'
        CurrentDirectory|contains: '\\\\wsl.localhost' # Note: programs not supporting UNC paths (example: cmd.exe). Will default to another location
    condition: selection
falsepositives:
    - Unknown
level: medium

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