{"id":"b210394c-ba12-4f89-9117-44a2464b9511","title":"SMB Create Remote File Admin Share","description":"Look for non-system accounts SMB accessing a file with write (0x2) access mask via administrative share (i.e C$).","author":"Jose Rodriguez (@Cyb3rPandaH), OTR (Open Threat Research)","status":"test","level":"high","date":"2020-08-06","modified":"2025-10-17","tags":["attack.lateral-movement","attack.t1021.002"],"technique_ids":["T1021.002"],"logsource":{"product":"windows","service":"security"},"falsepositives":["Unknown"],"references":["https://github.com/OTRF/ThreatHunter-Playbook/blob/f7a58156dbfc9b019f17f638b8c62d22e557d350/playbooks/WIN-201012004336.yaml","https://securitydatasets.com/notebooks/atomic/windows/lateral_movement/SDWIN-200806015757.html?highlight=create%20file"],"source_path":"rules/windows/builtin/security/win_security_smb_file_creation_admin_shares.yml","source_sha256":"1c82f8a040e9028a36348028bf73a1310919d94b72d338c12343347badb6dca2","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/security/win_security_smb_file_creation_admin_shares.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: SMB Create Remote File Admin Share\nid: b210394c-ba12-4f89-9117-44a2464b9511\nstatus: test\ndescription: Look for non-system accounts SMB accessing a file with write (0x2) access mask via administrative share (i.e C$).\nreferences:\n    - https://github.com/OTRF/ThreatHunter-Playbook/blob/f7a58156dbfc9b019f17f638b8c62d22e557d350/playbooks/WIN-201012004336.yaml\n    - https://securitydatasets.com/notebooks/atomic/windows/lateral_movement/SDWIN-200806015757.html?highlight=create%20file\nauthor: Jose Rodriguez (@Cyb3rPandaH), OTR (Open Threat Research)\ndate: 2020-08-06\nmodified: 2025-10-17\ntags:\n    - attack.lateral-movement\n    - attack.t1021.002\nlogsource:\n    product: windows\n    service: security\ndetection:\n    selection:\n        EventID: 5145\n        ShareName|endswith: 'C$'\n        AccessMask: '0x2'\n    filter_main_subjectusername:\n        SubjectUserName|endswith: '$'\n    filter_optional_local_ip:\n        IpAddress: '::1'\n    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*\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/b210394c-ba12-4f89-9117-44a2464b9511.json","kind":"sigma"}