{"id":"9c8acf1a-cbf9-4db6-b63c-74baabe03e59","title":"NTLM Brute Force","description":"Detects common NTLM brute force device names","author":"Jerry Shockley '@jsh0x'","status":"test","level":"medium","date":"2022-02-02","modified":"","tags":["attack.credential-access","attack.t1110"],"technique_ids":["T1110"],"logsource":{"product":"windows","service":"ntlm","definition":"Requires events from Microsoft-Windows-NTLM/Operational"},"falsepositives":["Systems with names equal to the spoofed ones used by the brute force tools"],"references":["https://www.varonis.com/blog/investigate-ntlm-brute-force"],"source_path":"rules/windows/builtin/ntlm/win_susp_ntlm_brute_force.yml","source_sha256":"bd2bfaa433093831880804c30c3772a07745ed427e71019deb94d5d0eb2513ea","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/ntlm/win_susp_ntlm_brute_force.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: NTLM Brute Force\nid: 9c8acf1a-cbf9-4db6-b63c-74baabe03e59\nstatus: test\ndescription: Detects common NTLM brute force device names\nreferences:\n    - https://www.varonis.com/blog/investigate-ntlm-brute-force\nauthor: Jerry Shockley '@jsh0x'\ndate: 2022-02-02\ntags:\n    - attack.credential-access\n    - attack.t1110\nlogsource:\n    product: windows\n    service: ntlm\n    definition: Requires events from Microsoft-Windows-NTLM/Operational\ndetection:\n    selection:\n        EventID: 8004\n    devicename:\n        WorkstationName:\n            - 'Rdesktop'\n            - 'Remmina'\n            - 'Freerdp'\n            - 'Windows7'\n            - 'Windows8'\n            - 'Windows2012'\n            - 'Windows2016'\n            - 'Windows2019'\n    condition: selection and devicename\nfalsepositives:\n    - Systems with names equal to the spoofed ones used by the brute force tools\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1110","id":"T1110","name":"Brute Force","page":"techniques/enterprise/T1110/"}],"data_path":"data/detection-rules/9c8acf1a-cbf9-4db6-b63c-74baabe03e59.json","kind":"sigma"}