{"id":"ae02ed70-11aa-4a22-b397-c0d0e8f6ea99","title":"Unusual File Download From File Sharing Websites - File Stream","description":"Detects the download of suspicious file type from a well-known file and paste sharing domain","author":"Florian Roth (Nextron Systems)","status":"test","level":"medium","date":"2022-08-24","modified":"2026-03-29","tags":["attack.stealth","attack.s0139","attack.t1564.004"],"technique_ids":["T1564.004"],"logsource":{"product":"windows","category":"create_stream_hash"},"falsepositives":["Unknown"],"references":["https://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventid=90015","https://www.cisa.gov/uscert/ncas/alerts/aa22-321a","https://www.microsoft.com/en-us/security/blog/2024/01/17/new-ttps-observed-in-mint-sandstorm-campaign-targeting-high-profile-individuals-at-universities-and-research-orgs/"],"source_path":"rules/windows/create_stream_hash/create_stream_hash_file_sharing_domains_download_unusual_extension.yml","source_sha256":"8829ebe41ec8913ad527d014f8a4b1f2cfb5fca749282542e97985b0bcfb9ec6","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/create_stream_hash/create_stream_hash_file_sharing_domains_download_unusual_extension.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Unusual File Download From File Sharing Websites - File Stream\nid: ae02ed70-11aa-4a22-b397-c0d0e8f6ea99\nrelated:\n    - id: 8b48ad89-10d8-4382-a546-50588c410f0d\n      type: similar\n    - id: d635249d-86b5-4dad-a8c7-d7272b788586\n      type: similar\n    - id: 52182dfb-afb7-41db-b4bc-5336cb29b464\n      type: similar\n    - id: e0f8ab85-0ac9-423b-a73a-81b3c7b1aa97\n      type: similar\n    - id: 7b434893-c57d-4f41-908d-6a17bf1ae98f\n      type: similar\n    - id: 8518ed3d-f7c9-4601-a26c-f361a4256a0c\n      type: similar\n    - id: 42a5f1e7-9603-4f6d-97ae-3f37d130d794\n      type: similar\n    - id: 56454143-524f-49fb-b1c6-3fb8b1ad41fb\n      type: similar\n    - id: b6e04788-29e1-4557-bb14-77f761848ab8\n      type: similar\n    - id: a0d7e4d2-bede-4141-8896-bc6e237e977c\n      type: similar\n    - id: 297ae038-edc2-4b2e-bb3e-7c5fc94dd5c7\n      type: similar\nstatus: test\ndescription: Detects the download of suspicious file type from a well-known file and paste sharing domain\nreferences:\n    - https://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventid=90015\n    - https://www.cisa.gov/uscert/ncas/alerts/aa22-321a\n    - https://www.microsoft.com/en-us/security/blog/2024/01/17/new-ttps-observed-in-mint-sandstorm-campaign-targeting-high-profile-individuals-at-universities-and-research-orgs/\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-08-24\nmodified: 2026-03-29\ntags:\n    - attack.stealth\n    - attack.s0139\n    - attack.t1564.004\nlogsource:\n    product: windows\n    category: create_stream_hash\ndetection:\n    selection_domain:\n        Contents|contains:\n            - '.githubusercontent.com'       # Includes both gists and github repositories / Michael Haag (idea)\n            - '0x0.st'\n            - 'anonfiles.com'\n            - 'bashupload.com'\n            - 'cdn.discordapp.com'\n            - 'chunk.io'\n            - 'ddns.net'\n            - 'dl.dropboxusercontent.com'\n            - 'ghostbin.co'\n            - 'github.com'\n            - 'glitch.me'\n            - 'gofile.io'\n            - 'hastebin.com'\n            - 'mediafire.com'\n            - 'mega.nz'\n            - 'onrender.com'\n            - 'pages.dev'\n            - 'paste.ee'\n            - 'pastebin.com'\n            - 'pastebin.pl'\n            - 'pastetext.net'\n            - 'pixeldrain.com'\n            - 'privatlab.com'\n            - 'privatlab.net'\n            - 'send.exploit.in'\n            - 'sendspace.com'\n            - 'storage.googleapis.com'\n            - 'storjshare.io'\n            - 'supabase.co'\n            - 'temp.sh'\n            - 'transfer.sh'\n            - 'trycloudflare.com'\n            - 'ufile.io'\n            - 'w3spaces.com'\n            - 'workers.dev'\n            - 'x0.at'\n    selection_extension:\n        TargetFilename|contains:\n            - '.bat:Zone'\n            - '.cmd:Zone'\n            - '.ps1:Zone'\n    condition: all of selection_*\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1564.004","id":"T1564.004","name":"NTFS File Attributes","page":"techniques/enterprise/T1564.004/"}],"data_path":"data/detection-rules/ae02ed70-11aa-4a22-b397-c0d0e8f6ea99.json","kind":"sigma"}