Potential ShellDispatch.DLL Functionality Abuse

Description

Detects potential "ShellDispatch.dll" functionality abuse to execute arbitrary binaries via "ShellExecute"

Query · sigma

selection_img:
- Image|endswith: \rundll32.exe
- OriginalFileName: RUNDLL32.EXE
selection_cli:
  CommandLine|contains: RunDll_ShellExecuteW
condition: all of selection_*

Known false positives

  • Unlikely
Raw source Potential ShellDispatch.DLL Functionality Abuse · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Potential ShellDispatch.DLL Functionality Abuse
id: 82343930-652f-43f5-ab70-2ee9fdd6d5e9
status: test
description: Detects potential "ShellDispatch.dll" functionality abuse to execute arbitrary binaries via "ShellExecute"
references:
    - https://www.hexacorn.com/blog/2023/06/07/this-lolbin-doesnt-exist/
author: X__Junior (Nextron Systems)
date: 2023-06-20
tags:
    - attack.execution
    - attack.stealth
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\rundll32.exe'
        - OriginalFileName: 'RUNDLL32.EXE'
    selection_cli:
        CommandLine|contains: 'RunDll_ShellExecuteW'
    condition: all of selection_*
falsepositives:
    - Unlikely
level: medium

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