{"id":"f1b3a22a-45e6-4004-afb5-4291f9c21166","title":"Suspicious PsExec Execution - Zeek","description":"detects execution of psexec or paexec with renamed service name, this rule helps to filter out the noise if psexec is used for legit purposes or if attacker uses a different psexec client other than sysinternal one","author":"Samir Bousseaden, @neu5ron, Tim Shelton","status":"test","level":"high","date":"2020-04-02","modified":"2022-12-27","tags":["attack.lateral-movement","attack.t1021.002"],"technique_ids":["T1021.002"],"logsource":{"product":"zeek","service":"smb_files"},"falsepositives":["Unknown"],"references":["https://web.archive.org/web/20230329171218/https://blog.menasec.net/2019/02/threat-hunting-3-detecting-psexec.html"],"source_path":"rules/network/zeek/zeek_smb_converted_win_susp_psexec.yml","source_sha256":"77394605b30a8318f7b5d130e81ff94a9f74bf4fd7c3e56778120a44cb0ac523","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/network/zeek/zeek_smb_converted_win_susp_psexec.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious PsExec Execution - Zeek\nid: f1b3a22a-45e6-4004-afb5-4291f9c21166\nrelated:\n    - id: c462f537-a1e3-41a6-b5fc-b2c2cef9bf82\n      type: derived\nstatus: test\ndescription: detects execution of psexec or paexec with renamed service name, this rule helps to filter out the noise if psexec is used for legit purposes or if attacker uses a different psexec client other than sysinternal one\nreferences:\n    - https://web.archive.org/web/20230329171218/https://blog.menasec.net/2019/02/threat-hunting-3-detecting-psexec.html\nauthor: Samir Bousseaden, @neu5ron, Tim Shelton\ndate: 2020-04-02\nmodified: 2022-12-27\ntags:\n    - attack.lateral-movement\n    - attack.t1021.002\nlogsource:\n    product: zeek\n    service: smb_files\ndetection:\n    selection:\n        path|contains|all:\n            - '\\\\'\n            - '\\IPC$'\n        name|endswith:\n            - '-stdin'\n            - '-stdout'\n            - '-stderr'\n    filter:\n        name|startswith: 'PSEXESVC'\n    condition: selection and not filter\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1021.002","id":"T1021.002","name":"SMB/Windows Admin Shares","page":"techniques/enterprise/T1021.002/"}],"data_path":"data/detection-rules/f1b3a22a-45e6-4004-afb5-4291f9c21166.json","kind":"sigma"}