{"id":"962fe167-e48d-4fd6-9974-11e5b9a5d6d1","title":"LSASS Access From Non System Account","description":"Detects potential mimikatz-like tools accessing LSASS from non system account","author":"Roberto Rodriguez @Cyb3rWard0g","status":"test","level":"medium","date":"2019-06-20","modified":"2023-12-11","tags":["attack.credential-access","attack.t1003.001"],"technique_ids":["T1003.001"],"logsource":{"product":"windows","service":"security"},"falsepositives":["Unknown"],"references":["https://threathunterplaybook.com/hunts/windows/170105-LSASSMemoryReadAccess/notebook.html"],"source_path":"rules/windows/builtin/security/win_security_lsass_access_non_system_account.yml","source_sha256":"65863c05f45751125c9b61f051edf65bbebfb9d055a6dc695553bdc27dadda15","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/security/win_security_lsass_access_non_system_account.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 Access From Non System Account\nid: 962fe167-e48d-4fd6-9974-11e5b9a5d6d1\nstatus: test\ndescription: Detects potential mimikatz-like tools accessing LSASS from non system account\nreferences:\n    - https://threathunterplaybook.com/hunts/windows/170105-LSASSMemoryReadAccess/notebook.html\nauthor: Roberto Rodriguez @Cyb3rWard0g\ndate: 2019-06-20\nmodified: 2023-12-11\ntags:\n    - attack.credential-access\n    - attack.t1003.001\nlogsource:\n    product: windows\n    service: security\ndetection:\n    selection:\n        EventID:\n            - 4663\n            - 4656\n        AccessMask:\n            - '0x100000'\n            - '0x1010'    # car.2019-04-004\n            - '0x1400'\n            - '0x1410'    # car.2019-04-004\n            - '0x1418'    # car.2019-04-004\n            - '0x1438'    # car.2019-04-004\n            - '0x143a'    # car.2019-04-004\n            - '0x1f0fff'\n            - '0x1f1fff'\n            - '0x1f2fff'\n            - '0x1f3fff'\n            - '0x40'\n            - '143a'    # car.2019-04-004\n            - '1f0fff'\n            - '1f1fff'\n            - '1f2fff'\n            - '1f3fff'\n            # - '0x1000'  # minimum access requirements to query basic info from service\n        ObjectType: 'Process'\n        ObjectName|endswith: '\\lsass.exe'\n    filter_main_service_account:\n        SubjectUserName|endswith: '$'\n    filter_main_generic:\n        ProcessName|contains:\n            # Legitimate AV and EDR solutions\n            - ':\\Program Files\\'\n            - ':\\Program Files (x86)\\'\n    filter_main_wmiprvse:\n        ProcessName: 'C:\\Windows\\System32\\wbem\\WmiPrvSE.exe'\n        AccessMask: '0x1410'\n    filter_optional_steam:\n        ProcessName|contains: '\\SteamLibrary\\steamapps\\'\n    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1003.001","id":"T1003.001","name":"LSASS Memory","page":"techniques/enterprise/T1003.001/"}],"data_path":"data/detection-rules/962fe167-e48d-4fd6-9974-11e5b9a5d6d1.json","kind":"sigma"}