LSASS Process Reconnaissance Via Findstr.EXE

 1title: LSASS Process Reconnaissance Via Findstr.EXE
 2id: fe63010f-8823-4864-a96b-a7b4a0f7b929
 3status: experimental
 4description: Detects findstring commands that include the keyword lsass, which indicates recon actviity for the LSASS process PID
 5references:
 6    - https://blog.talosintelligence.com/2022/08/recent-cyber-attack.html?m=1
 7author: Florian Roth (Nextron Systems)
 8date: 2022-08-12
 9modified: 2024-06-04
10tags:
11    - attack.credential-access
12    - attack.t1552.006
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_findstr_img:
18        - Image|endswith:
19              - '\find.exe'
20              - '\findstr.exe'
21        - OriginalFileName:
22              - 'FIND.EXE'
23              - 'FINDSTR.EXE'
24    selection_findstr_cli:
25        CommandLine|contains: 'lsass'
26    selection_special:
27        CommandLine|contains|windash:
28            - ' /i "lsass'
29            - ' /i lsass.exe'
30            - 'findstr "lsass'
31            - 'findstr lsass'
32            - 'findstr.exe "lsass'
33            - 'findstr.exe lsass'
34    condition: all of selection_findstr_* or selection_special
35falsepositives:
36    - Unknown
37level: high