{"id":"fe63010f-8823-4864-a96b-a7b4a0f7b929","title":"LSASS Process Reconnaissance Via Findstr.EXE","description":"Detects findstring commands that include the keyword lsass, which indicates recon actviity for the LSASS process PID","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2022-08-12","modified":"2024-06-04","tags":["attack.credential-access","attack.t1552.006"],"technique_ids":["T1552.006"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://blog.talosintelligence.com/2022/08/recent-cyber-attack.html?m=1"],"source_path":"rules/windows/process_creation/proc_creation_win_findstr_lsass.yml","source_sha256":"9f046378b2567737d6e3bf02fe2cae5c7910ce00e30dd85c8e3e5fdab95b7471","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_findstr_lsass.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: LSASS Process Reconnaissance Via Findstr.EXE\nid: fe63010f-8823-4864-a96b-a7b4a0f7b929\nstatus: test\ndescription: Detects findstring commands that include the keyword lsass, which indicates recon actviity for the LSASS process PID\nreferences:\n    - https://blog.talosintelligence.com/2022/08/recent-cyber-attack.html?m=1\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-08-12\nmodified: 2024-06-04\ntags:\n    - attack.credential-access\n    - attack.t1552.006\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_findstr_img:\n        - Image|endswith:\n              - '\\find.exe'\n              - '\\findstr.exe'\n        - OriginalFileName:\n              - 'FIND.EXE'\n              - 'FINDSTR.EXE'\n    selection_findstr_cli:\n        CommandLine|contains: 'lsass'\n    selection_special:\n        CommandLine|contains|windash:\n            - ' /i \"lsass'\n            - ' /i lsass.exe'\n            - 'findstr \"lsass'\n            - 'findstr lsass'\n            - 'findstr.exe \"lsass'\n            - 'findstr.exe lsass'\n    condition: all of selection_findstr_* or selection_special\nfalsepositives:\n    - Unknown\nlevel: high\nregression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_findstr_lsass/info.yml\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1552.006","id":"T1552.006","name":"Group Policy Preferences","page":"techniques/enterprise/T1552.006/"}],"data_path":"data/detection-rules/fe63010f-8823-4864-a96b-a7b4a0f7b929.json","kind":"sigma"}