{"id":"7892ec59-c5bb-496d-8968-e5d210ca3ac4","title":"DPAPI Backup Keys And Certificate Export Activity IOC","description":"Detects file names with specific patterns seen generated and used by tools such as Mimikatz and DSInternals related to exported or stolen DPAPI backup keys and certificates.\n","author":"Nounou Mbeiri, Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2024-06-26","modified":"","tags":["attack.credential-access","attack.t1555","attack.t1552.004"],"technique_ids":["T1552.004","T1555"],"logsource":{"product":"windows","category":"file_event"},"falsepositives":["Unlikely"],"references":["https://www.dsinternals.com/en/dpapi-backup-key-theft-auditing/","https://github.com/MichaelGrafnetter/DSInternals/blob/39ee8a69bbdc1cfd12c9afdd7513b4788c4895d4/Src/DSInternals.Common/Data/DPAPI/DPAPIBackupKey.cs#L28-L32"],"source_path":"rules/windows/file/file_event/file_event_win_susp_dpapi_backup_and_cert_export_ioc.yml","source_sha256":"bec6c923fbe86633b86a0d4a3d65606d123ead6e6e891f042d63ef3e779230d7","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/file/file_event/file_event_win_susp_dpapi_backup_and_cert_export_ioc.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: DPAPI Backup Keys And Certificate Export Activity IOC\nid: 7892ec59-c5bb-496d-8968-e5d210ca3ac4\nstatus: test\ndescription: |\n    Detects file names with specific patterns seen generated and used by tools such as Mimikatz and DSInternals related to exported or stolen DPAPI backup keys and certificates.\nreferences:\n    - https://www.dsinternals.com/en/dpapi-backup-key-theft-auditing/\n    - https://github.com/MichaelGrafnetter/DSInternals/blob/39ee8a69bbdc1cfd12c9afdd7513b4788c4895d4/Src/DSInternals.Common/Data/DPAPI/DPAPIBackupKey.cs#L28-L32\nauthor: Nounou Mbeiri, Nasreddine Bencherchali (Nextron Systems)\ndate: 2024-06-26\ntags:\n    - attack.credential-access\n    - attack.t1555\n    - attack.t1552.004\nlogsource:\n    product: windows\n    category: file_event\ndetection:\n    selection:\n        TargetFilename|contains:\n            - 'ntds_capi_'\n            - 'ntds_legacy_'\n            - 'ntds_unknown_'\n        TargetFilename|endswith:\n            - '.cer'\n            - '.key'\n            - '.pfx'\n            - '.pvk'\n    condition: selection\nfalsepositives:\n    - Unlikely\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1552.004","id":"T1552.004","name":"Private Keys","page":"techniques/enterprise/T1552.004/"},{"key":"enterprise/T1555","id":"T1555","name":"Credentials from Password Stores","page":"techniques/enterprise/T1555/"}],"data_path":"data/detection-rules/7892ec59-c5bb-496d-8968-e5d210ca3ac4.json","kind":"sigma"}