Windows Subsystem for Linux Enabled via Dism Utility

Detects attempts to enable the Windows Subsystem for Linux using Microsoft Dism utility. Adversaries may enable and use WSL for Linux to avoid detection.

Rule type: eql

Rule indices:

winlogbeat-*
logs-endpoint.events.*
logs-windows.*
endgame-*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://blog.f-secure.com/hunting-for-windows-subsystem-for-linux/

Tags:

Elastic
Host
Windows
Threat Detection
Defense Evasion
Elastic Endgame

Version: 1

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

process where event.type : "start" and
 (process.name : "Dism.exe" or process.pe.original_file_name == "DISM.EXE") and
 process.command_line : "*Microsoft-Windows-Subsystem-Linux*"

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Indirect Command Execution
- ID: T1202
- Reference URL: https://attack.mitre.org/techniques/T1202/

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