title: Rundll32 Without Parameters
id: 5bb68627-3198-40ca-b458-49f973db8752
status: experimental
description: Detects rundll32 execution without parameters as observed when running Metasploit windows/smb/psexec exploit module
author: Bartlomiej Czyz, Relativity
date: 2021/01/31
references:
    - https://bczyz1.github.io/2021/01/30/psexec.html
tags:
    - attack.lateral_movement
    - attack.t1021.002
    - attack.t1570
    - attack.execution
    - attack.t1569.002
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine: 'rundll32.exe'
    condition: selection
fields:
    - ComputerName
    - SubjectUserName
    - CommandLine
    - Image
    - ParentImage
falsepositives:
    - Unknown
level: high