{"id":"06125661-3814-4e03-bfa2-1e4411c60ac3","title":"Backup Files Deleted","description":"Detects deletion of files with extensions often used for backup files. Adversaries may delete or remove built-in operating system data and turn off services designed to aid in the recovery of a corrupted system to prevent recovery.","author":"frack113","status":"test","level":"medium","date":"2022-01-02","modified":"2023-02-15","tags":["attack.impact","attack.t1490"],"technique_ids":["T1490"],"logsource":{"product":"windows","category":"file_delete"},"falsepositives":["Legitimate usage"],"references":["https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1490/T1490.md#atomic-test-6---windows---delete-backup-files"],"source_path":"rules/windows/file/file_delete/file_delete_win_delete_backup_file.yml","source_sha256":"db1ccbcab8bc0c135ecf062739690a2a99b5d485d075e6c73365889e158d7189","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/file/file_delete/file_delete_win_delete_backup_file.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Backup Files Deleted\nid: 06125661-3814-4e03-bfa2-1e4411c60ac3\nstatus: test\ndescription: Detects deletion of files with extensions often used for backup files. Adversaries may delete or remove built-in operating system data and turn off services designed to aid in the recovery of a corrupted system to prevent recovery.\nreferences:\n    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1490/T1490.md#atomic-test-6---windows---delete-backup-files\nauthor: frack113\ndate: 2022-01-02\nmodified: 2023-02-15\ntags:\n    - attack.impact\n    - attack.t1490\nlogsource:\n    product: windows\n    category: file_delete\ndetection:\n    selection:\n        Image|endswith:\n            - '\\cmd.exe'\n            - '\\powershell.exe'\n            - '\\pwsh.exe'\n            - '\\wt.exe'\n            - '\\rundll32.exe'\n            - '\\regsvr32.exe'\n        TargetFilename|endswith:\n            - '.VHD'\n            - '.bac'\n            - '.bak'\n            - '.wbcat'\n            - '.bkf'\n            - '.set'\n            - '.win'\n            - '.dsk'\n    condition: selection\nfalsepositives:\n    - Legitimate usage\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1490","id":"T1490","name":"Inhibit System Recovery","page":"techniques/enterprise/T1490/"}],"data_path":"data/detection-rules/06125661-3814-4e03-bfa2-1e4411c60ac3.json","kind":"sigma"}