Abnormal LSASS Process Access and Injection

 1title: Abnormal LSASS Process Access and Injection
 2id: 23fac7e9-3c44-4b76-891b-72c4d44e1964
 3status: experimental
 4description: Detects obviously suspicious cross-process events targetting lsass.exe.
 5    Inspired by the 2022 Red Canary Threat Detection report.
 6references:
 7    - https://redcanary.com/threat-detection-report/techniques/lsass-memory/
 8author: Micah Babinski
 9date: 2022/11/03
10tags:
11    - attack.credential_access
12    - attack.t1003.001
13logsource:
14    category: process_access
15    product: windows
16detection:
17    selection:
18        SourceImage|endswith:
19            - '\powershell.exe'
20            - '\taskmgr.exe'
21            - '\rundll32.exe'
22            - '\procdump.exe'
23            - '\procexp.exe'
24        TargetImage|endswith: '\lsass.exe'
25    condition: selection
26falsepositives:
27    - Unknown
28level: medium```

References

• LSASS Memory - Red Canary Threat Detection Report

  

  Because of the amount of data it stores in memory, LSASS is a common target for adversaries looking to steal sensitive credentials.

  
  Read More

Related rules

• Abnormal LSASS Child and Parent Process Relationships
• Dumping Process via Sqldumper.exe
• Password Dumper Activity on LSASS
• Time Travel Debugging Utility Usage
• Invocation of Active Directory Diagnostic Tool (ntdsutil.exe)