title: Invoke-Obfuscation Via Use Rundll32
author: Nikita Nazarov, oscd.community
date: 2019/10/08
description: Detects Obfuscated Powershell via use Rundll32 in Scripts
detection:
    SELECTION_1:
        Payload|re: (?i).*&&.*rundll32.*shell32\.dll.*shellexec_rundll.*(value|invoke|comspec|iex).*"
    condition: SELECTION_1
falsepositives:
- Unknown
id: 88a22f69-62f9-4b8a-aa00-6b0212f2f05a
level: high
logsource:
    category: ps_module
    definition: PowerShell Module Logging must be enabled
    product: windows
modified: 2021/10/16
references:
- https://github.com/Neo23x0/sigma/issues/1009
related:
-   id: a5a30a6e-75ca-4233-8b8c-42e0f2037d3b
    type: derived
status: experimental
tags:
- attack.defense_evasion
- attack.t1027
- attack.execution
- attack.t1059.001
yml_filename: powershell_invoke_obfuscation_via_use_rundll32.yml
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/powershell/powershell_module