Rundll32 Injection into LSASS

 1title: Rundll32 Injection into LSASS
 2id: c6a45ac1-b909-423b-907b-a9bfde31ab9c
 3status: experimental
 4description: |
 5    The following pseudo-detector should help security teams detect instances 
 6    where Rundll32 opens a cross process handle into LSASS to collect credentials. 
 7    Part of the RedCanary 2024 Threat Detection Report.    
 8references:
 9    - https://redcanary.com/threat-detection-report/techniques/rundll32/
10author: RedCanary, Sigma formatting by Micah Babinski
11date: 2024/03/21
12tags:
13    - attack.defense_evasion
14    - attack.t1218
15    - attack.t1218.011
16    - attack.t1055
17logsource:
18    category: process_access
19    product: windows
20detection:
21    selection:
22        SourceImage|endswith: '\rundll32.exe'
23        TargetImage|endswith: '\lsass.exe'
24    condition: selection
25falsepositives:
26    - Unknown
27level: low```

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 DllRegisterServer Function
• Rundll32 Without a Command Line
• Rundll32 with Suspicious Process Lineage
• Suspicious Export Functionalities - Rundll32
• Application Bypass with RunDLL32 and DllRegisterServer Function