Rundll32 Execution Without Parameters

 1title: Rundll32 Execution Without Parameters
 2id: 5bb68627-3198-40ca-b458-49f973db8752
 3status: test
 4description: Detects rundll32 execution without parameters as observed when running Metasploit windows/smb/psexec exploit module
 5references:
 6    - https://bczyz1.github.io/2021/01/30/psexec.html
 7author: Bartlomiej Czyz, Relativity
 8date: 2021-01-31
 9modified: 2023-02-28
10tags:
11    - attack.lateral-movement
12    - attack.t1021.002
13    - attack.t1570
14    - attack.execution
15    - attack.t1569.002
16logsource:
17    category: process_creation
18    product: windows
19detection:
20    selection:
21        CommandLine:
22            - 'rundll32.exe'
23            - 'rundll32'
24    condition: selection
25fields:
26    - ComputerName
27    - SubjectUserName
28    - CommandLine
29    - Image
30    - ParentImage
31falsepositives:
32    - False positives may occur if a user called rundll32 from CLI with no options
33level: high