{"id":"34979410-e4b5-4e5d-8cfb-389fdff05c12","title":"Remove Immutable File Attribute","description":"Detects usage of the 'chattr' utility to remove immutable file attribute.","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2022-09-15","modified":"","tags":["attack.defense-impairment","attack.t1222.002"],"technique_ids":["T1222.002"],"logsource":{"product":"linux","category":"process_creation"},"falsepositives":["Administrator interacting with immutable files (e.g. for instance backups)."],"references":["https://www.trendmicro.com/en_us/research/22/i/how-malicious-actors-abuse-native-linux-tools-in-their-attacks.html"],"source_path":"rules/linux/process_creation/proc_creation_lnx_chattr_immutable_removal.yml","source_sha256":"3fbd0d310cba0f7fbfb0d1ca241d20bb8c8f5f43799c45723830f9aa8fb320f4","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/linux/process_creation/proc_creation_lnx_chattr_immutable_removal.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Remove Immutable File Attribute\nid: 34979410-e4b5-4e5d-8cfb-389fdff05c12\nrelated:\n    - id: a5b977d6-8a81-4475-91b9-49dbfcd941f7\n      type: derived\nstatus: test\ndescription: Detects usage of the 'chattr' utility to remove immutable file attribute.\nreferences:\n    - https://www.trendmicro.com/en_us/research/22/i/how-malicious-actors-abuse-native-linux-tools-in-their-attacks.html\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-09-15\ntags:\n    - attack.defense-impairment\n    - attack.t1222.002\nlogsource:\n    product: linux\n    category: process_creation\ndetection:\n    selection:\n        Image|endswith: '/chattr'\n        CommandLine|contains: ' -i '\n    condition: selection\nfalsepositives:\n    - Administrator interacting with immutable files (e.g. for instance backups).\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1222.002","id":"T1222.002","name":"Linux and Mac Permissions","page":"techniques/enterprise/T1222.002/"}],"data_path":"data/detection-rules/34979410-e4b5-4e5d-8cfb-389fdff05c12.json","kind":"sigma"}