{"id":"9acf45ed-3a26-4062-bf08-56857613eb52","title":"New File Exclusion Added To Time Machine Via Tmutil - MacOS","description":"Detects the addition of a new file or path exclusion to MacOS Time Machine via the \"tmutil\" utility.\nAn adversary could exclude a path from Time Machine backups to prevent certain files from being backed up.\n","author":"Pratinav Chandra","status":"test","level":"medium","date":"2024-05-29","modified":"","tags":["attack.impact","attack.t1490"],"technique_ids":["T1490"],"logsource":{"category":"process_creation","product":"macos"},"falsepositives":["Legitimate administrator activity"],"references":["https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1490/T1490.md#atomic-test-12---disable-time-machine","https://www.loobins.io/binaries/tmutil/"],"source_path":"rules/macos/process_creation/proc_creation_macos_tmutil_exclude_file_from_backup.yml","source_sha256":"2caf7d23481ef998150c6097543cf6640f7c2eee6ae8ff32d8d67ea37fcd7a33","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/macos/process_creation/proc_creation_macos_tmutil_exclude_file_from_backup.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: New File Exclusion Added To Time Machine Via Tmutil - MacOS\nid: 9acf45ed-3a26-4062-bf08-56857613eb52\nstatus: test\ndescription: |\n    Detects the addition of a new file or path exclusion to MacOS Time Machine via the \"tmutil\" utility.\n    An adversary could exclude a path from Time Machine backups to prevent certain files from being backed up.\nreferences:\n    - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1490/T1490.md#atomic-test-12---disable-time-machine\n    - https://www.loobins.io/binaries/tmutil/\nauthor: Pratinav Chandra\ndate: 2024-05-29\ntags:\n    - attack.impact\n    - attack.t1490\nlogsource:\n    category: process_creation\n    product: macos\ndetection:\n    selection_img:\n        - Image|endswith: '/tmutil'\n        - CommandLine|contains: 'tmutil'\n    selection_cmd:\n        CommandLine|contains: 'addexclusion'\n    condition: all of selection_*\nfalsepositives:\n    - Legitimate administrator activity\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/9acf45ed-3a26-4062-bf08-56857613eb52.json","kind":"sigma"}