{"id":"e2072cab-8c9a-459b-b63c-40ae79e27031","title":"Decode Base64 Encoded Text","description":"Detects usage of base64 utility to decode arbitrary base64-encoded text","author":"Daniil Yugoslavskiy, oscd.community","status":"test","level":"low","date":"2020-10-19","modified":"2021-11-27","tags":["attack.stealth","attack.t1027"],"technique_ids":["T1027"],"logsource":{"category":"process_creation","product":"linux"},"falsepositives":["Legitimate activities"],"references":["https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1027/T1027.md"],"source_path":"rules/linux/process_creation/proc_creation_lnx_base64_decode.yml","source_sha256":"5f19210a426f49e15a3906295928895f4d5e81800f9eb5a2328ce973cfc50d48","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/linux/process_creation/proc_creation_lnx_base64_decode.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Decode Base64 Encoded Text\nid: e2072cab-8c9a-459b-b63c-40ae79e27031\nstatus: test\ndescription: Detects usage of base64 utility to decode arbitrary base64-encoded text\nreferences:\n    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1027/T1027.md\nauthor: Daniil Yugoslavskiy, oscd.community\ndate: 2020-10-19\nmodified: 2021-11-27\ntags:\n    - attack.stealth\n    - attack.t1027\nlogsource:\n    category: process_creation\n    product: linux\ndetection:\n    selection:\n        Image|endswith: '/base64'\n        CommandLine|contains: '-d' # Also covers \"--decode\"\n    condition: selection\nfalsepositives:\n    - Legitimate activities\nlevel: low\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1027","id":"T1027","name":"Obfuscated Files or Information","page":"techniques/enterprise/T1027/"}],"data_path":"data/detection-rules/e2072cab-8c9a-459b-b63c-40ae79e27031.json","kind":"sigma"}