Hidden Powershell in Link File Pattern

Description

Detects events that appear when a user click on a link file with a powershell command in it

Query · sigma

selection:
  ParentImage: C:\Windows\explorer.exe
  Image: C:\Windows\System32\cmd.exe
  CommandLine|contains|all:
  - powershell
  - .lnk
condition: selection

Known false positives

  • Legitimate commands in .lnk files
Raw source Hidden Powershell in Link File Pattern · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Hidden Powershell in Link File Pattern
id: 30e92f50-bb5a-4884-98b5-d20aa80f3d7a
status: test
description: Detects events that appear when a user click on a link file with a powershell command in it
references:
    - https://www.x86matthew.com/view_post?id=embed_exe_lnk
author: frack113
date: 2022-02-06
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage: C:\Windows\explorer.exe
        Image: C:\Windows\System32\cmd.exe
        CommandLine|contains|all:
            - 'powershell'
            - '.lnk'
    condition: selection
falsepositives:
    - Legitimate commands in .lnk files
level: medium

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