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Invoke-Obfuscation RUNDLL LAUNCHER - PowerShell

Detects Obfuscated Powershell via RUNDLL LAUNCHER

MITRE ATT&CK

defense-evasionexecution

Detection Query

selection_4104:
  ScriptBlockText|contains|all:
    - rundll32.exe
    - shell32.dll
    - shellexec_rundll
    - powershell
condition: selection_4104

Author

Timur Zinniatullin, oscd.community

Created

2020-10-18

Data Sources

windowsps_script

Platforms

windows

References

https://github.com/SigmaHQ/sigma/issues/1009

Tags

attack.defense-evasionattack.t1027attack.executionattack.t1059.001

Raw Content

title: Invoke-Obfuscation RUNDLL LAUNCHER - PowerShell
id: e6cb92b4-b470-4eb8-8a9d-d63e8583aae0
status: test
description: Detects Obfuscated Powershell via RUNDLL LAUNCHER
references:
    - https://github.com/SigmaHQ/sigma/issues/1009 # (Task 23)
author: Timur Zinniatullin, oscd.community
date: 2020-10-18
modified: 2022-11-29
tags:
    - attack.defense-evasion
    - attack.t1027
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection_4104:
        ScriptBlockText|contains|all:
            - 'rundll32.exe'
            - 'shell32.dll'
            - 'shellexec_rundll'
            - 'powershell'
    condition: selection_4104
falsepositives:
    - Unknown
level: medium