{"id":"643bdcac-8b82-49f4-9fd9-25a90b929f3b","title":"Renamed MegaSync Execution","description":"Detects the execution of a renamed MegaSync.exe as seen used by ransomware families like Nefilim, Sodinokibi, Pysa, and Conti.","author":"Sittikorn S","status":"test","level":"high","date":"2021-06-22","modified":"2023-02-03","tags":["attack.stealth","attack.t1218"],"technique_ids":["T1218"],"logsource":{"product":"windows","category":"process_creation"},"falsepositives":["Software that illegally integrates MegaSync in a renamed form","Administrators that have renamed MegaSync"],"references":["https://redcanary.com/blog/rclone-mega-extortion/"],"source_path":"rules/windows/process_creation/proc_creation_win_renamed_megasync.yml","source_sha256":"d2a3544d1625cbd33812c6bcef2f523cd8600d078fe0c9e72027aae41565e3ea","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_renamed_megasync.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Renamed MegaSync Execution\nid: 643bdcac-8b82-49f4-9fd9-25a90b929f3b\nstatus: test\ndescription: Detects the execution of a renamed MegaSync.exe as seen used by ransomware families like Nefilim, Sodinokibi, Pysa, and Conti.\nreferences:\n    - https://redcanary.com/blog/rclone-mega-extortion/\nauthor: Sittikorn S\ndate: 2021-06-22\nmodified: 2023-02-03\ntags:\n    - attack.stealth\n    - attack.t1218\nlogsource:\n    product: windows\n    category: process_creation\ndetection:\n    selection:\n        OriginalFileName: 'megasync.exe'\n    filter:\n        Image|endswith: '\\megasync.exe'\n    condition: selection and not filter\nfalsepositives:\n    - Software that illegally integrates MegaSync in a renamed form\n    - Administrators that have renamed MegaSync\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1218","id":"T1218","name":"System Binary Proxy Execution","page":"techniques/enterprise/T1218/"}],"data_path":"data/detection-rules/643bdcac-8b82-49f4-9fd9-25a90b929f3b.json","kind":"sigma"}