Rundll32 without Command Line

 1title: Rundll32 without Command Line
 2id: 48bd57e9-1b2b-4be9-a2aa-5fccbe86b136
 3status: experimental
 4description: Detects instances of rundll32.exe with no command line that spawns a
 5    child process. Inspired by the 2022 Red Canary Threat Detection report.
 6references:
 7    - https://redcanary.com/threat-detection-report/techniques/rundll32/
 8author: Micah Babinski
 9date: 2022/11/03
10tags:
11    - attack.defense_evasion
12    - attack.t1218
13    - attack.t1218.011
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection:
19        ParentCommandLine:
20            - 'rundll32.exe'
21            - 'rundll32'
22            - null
23        ParentImage|endswith: '\rundll32.exe'
24    condition: selection
25falsepositives:
26    - Unknown
27level: medium```

References

• Rundll32 - Red Canary Threat Detection Report

  

  Adversaries use Rundll32, a native Windows process, to execute malicious code through DLLs, often to bypass application controls.

  
  Read More

Related rules

• Application Bypass with RunDLL32 and DllRegisterServer Function
• Rundll32 with Suspicious Export Functionalities
• Rundll32 with Suspicious Process Lineage
• Abusing PowerShell to Disable Defender Components
• Abusing PowerShell to Modify Defender Components