sigmamediumHunting

Potential ShellDispatch.DLL Functionality Abuse

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

Detection Query

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

Author

X__Junior (Nextron Systems)

Created

2023-06-20

Data Sources

windowsProcess Creation Events

Platforms

windows

References

https://www.hexacorn.com/blog/2023/06/07/this-lolbin-doesnt-exist/

Tags

attack.executionattack.defense-evasion

Raw Content

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.defense-evasion
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