{"id":"eca91c7c-9214-47b9-b4c5-cb1d7e4f2350","title":"Uncommon Outbound Kerberos Connection - Security","description":"Detects uncommon outbound network activity via Kerberos default port indicating possible lateral movement or first stage PrivEsc via delegation.\n","author":"Ilyas Ochkov, oscd.community","status":"test","level":"medium","date":"2019-10-24","modified":"2024-03-15","tags":["attack.lateral-movement","attack.credential-access","attack.t1558.003"],"technique_ids":["T1558.003"],"logsource":{"product":"windows","service":"security"},"falsepositives":["Web Browsers and third party application might generate similar activity. An initial baseline is required."],"references":["https://github.com/GhostPack/Rubeus"],"source_path":"rules/windows/builtin/security/win_security_susp_outbound_kerberos_connection.yml","source_sha256":"11da4d56d7adb8f012cb18bae1ac3fa9eb2812c1fabf0ef0592961e72ca722ce","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/security/win_security_susp_outbound_kerberos_connection.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Uncommon Outbound Kerberos Connection - Security\nid: eca91c7c-9214-47b9-b4c5-cb1d7e4f2350\nrelated:\n    - id: e54979bd-c5f9-4d6c-967b-a04b19ac4c74\n      type: similar\nstatus: test\ndescription: |\n    Detects uncommon outbound network activity via Kerberos default port indicating possible lateral movement or first stage PrivEsc via delegation.\nreferences:\n    - https://github.com/GhostPack/Rubeus\nauthor: Ilyas Ochkov, oscd.community\ndate: 2019-10-24\nmodified: 2024-03-15\ntags:\n    - attack.lateral-movement\n    - attack.credential-access\n    - attack.t1558.003\nlogsource:\n    product: windows\n    service: security\ndetection:\n    selection:\n        EventID: 5156\n        DestPort: 88\n    filter_main_lsass:\n        Application|startswith:\n            - '\\device\\harddiskvolume'\n            - 'C:'\n        Application|endswith: '\\Windows\\System32\\lsass.exe'\n    filter_optional_chrome:\n        Application|startswith:\n            - '\\device\\harddiskvolume'\n            - 'C:'\n        Application|endswith:\n            - '\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe'\n            - '\\Program Files\\Google\\Chrome\\Application\\chrome.exe'\n    filter_optional_firefox:\n        Application|startswith:\n            - '\\device\\harddiskvolume'\n            - 'C:'\n        Application|endswith:\n            - '\\Program Files (x86)\\Mozilla Firefox\\firefox.exe'\n            - '\\Program Files\\Mozilla Firefox\\firefox.exe'\n    filter_optional_tomcat:\n        Application|endswith: '\\tomcat\\bin\\tomcat8.exe'\n    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*\nfalsepositives:\n    - Web Browsers and third party application might generate similar activity. An initial baseline is required.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1558.003","id":"T1558.003","name":"Kerberoasting","page":"techniques/enterprise/T1558.003/"}],"data_path":"data/detection-rules/eca91c7c-9214-47b9-b4c5-cb1d7e4f2350.json","kind":"sigma"}