{"id":"6c0ce3b6-85e2-49d4-9c3f-6e008ce9796e","title":"Suspicious Deno File Written from Remote Source","description":"Detects Deno writing a file from a direct HTTP(s) call and writing to the appdata folder or bringing it's own malicious DLL.\nThis behavior may indicate an attempt to execute remotely hosted, potentially malicious files through deno.\n","author":"Josh Nickels, Michael Taggart","status":"experimental","level":"low","date":"2025-05-22","modified":"","tags":["attack.execution","attack.t1204","attack.t1059.007","attack.command-and-control","attack.t1105"],"technique_ids":["T1059.007","T1105","T1204"],"logsource":{"category":"file_event","product":"windows"},"falsepositives":["Legitimate usage of deno to request a file or bring a DLL to a host"],"references":["https://taggart-tech.com/evildeno/"],"source_path":"rules/windows/file/file_event/file_event_win_creation_deno.yml","source_sha256":"0f078e59f845b74685e2dc10baea920f717baf8feb7c0957b88ca7d58fe8456f","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/file/file_event/file_event_win_creation_deno.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious Deno File Written from Remote Source\nid: 6c0ce3b6-85e2-49d4-9c3f-6e008ce9796e\nstatus: experimental\ndescription: |\n    Detects Deno writing a file from a direct HTTP(s) call and writing to the appdata folder or bringing it's own malicious DLL.\n    This behavior may indicate an attempt to execute remotely hosted, potentially malicious files through deno.\nreferences:\n    - https://taggart-tech.com/evildeno/\nauthor: Josh Nickels, Michael Taggart\ndate: 2025-05-22\ntags:\n    - attack.execution\n    - attack.t1204\n    - attack.t1059.007\n    - attack.command-and-control\n    - attack.t1105\nlogsource:\n    category: file_event\n    product: windows\ndetection:\n    selection_path:\n        TargetFilename|contains:\n            - '\\deno\\gen\\'\n            - '\\deno\\remote\\https\\'\n        TargetFilename|contains|all:\n            - ':\\Users\\'\n            - '\\AppData\\'\n    condition: selection_path\nfalsepositives:\n    - Legitimate usage of deno to request a file or bring a DLL to a host\nlevel: low\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1059.007","id":"T1059.007","name":"JavaScript","page":"techniques/enterprise/T1059.007/"},{"key":"enterprise/T1105","id":"T1105","name":"Ingress Tool Transfer","page":"techniques/enterprise/T1105/"},{"key":"enterprise/T1204","id":"T1204","name":"User Execution","page":"techniques/enterprise/T1204/"}],"data_path":"data/detection-rules/6c0ce3b6-85e2-49d4-9c3f-6e008ce9796e.json","kind":"sigma"}