Sigma rule: Unusual File Download From File Sharing Websites - File Stream

Rule

Title

Unusual File Download From File Sharing Websites - File Stream

Status

test

Level

medium

Author

Florian Roth (Nextron Systems)

Date

2022-08-24

Modified

2026-03-29

File

rules/windows/create_stream_hash/create_stream_hash_file_sharing_domains_download_unusual_extension.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the download of suspicious file type from a well-known file and paste sharing domain

Log source

product

windows

category

create_stream_hash

Detection

selection_domain:
    Contents|contains:
        - '.githubusercontent.com'       # Includes both gists and github repositories / Michael Haag (idea)
        - '0x0.st'
        - 'anonfiles.com'
        - 'bashupload.com'
        - 'cdn.discordapp.com'
        - 'chunk.io'
        - 'ddns.net'
        - 'dl.dropboxusercontent.com'
        - 'ghostbin.co'
        - 'github.com'
        - 'glitch.me'
        - 'gofile.io'
        - 'hastebin.com'
        - 'mediafire.com'
        - 'mega.nz'
        - 'onrender.com'
        - 'pages.dev'
        - 'paste.ee'
        - 'pastebin.com'
        - 'pastebin.pl'
        - 'pastetext.net'
        - 'pixeldrain.com'
        - 'privatlab.com'
        - 'privatlab.net'
        - 'send.exploit.in'
        - 'sendspace.com'
        - 'storage.googleapis.com'
        - 'storjshare.io'
        - 'supabase.co'
        - 'temp.sh'
        - 'transfer.sh'
        - 'trycloudflare.com'
        - 'ufile.io'
        - 'w3spaces.com'
        - 'workers.dev'
        - 'x0.at'
selection_extension:
    TargetFilename|contains:
        - '.bat:Zone'
        - '.cmd:Zone'
        - '.ps1:Zone'
condition: all of selection_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.stealth
• attack.s0139
• attack.t1564.004

MITRE ATT&CK ids this rule names

• S0139
• T1564.004

Related rules

• 8b48ad89-10d8-4382-a546-50588c410f0d (similar)
• d635249d-86b5-4dad-a8c7-d7272b788586 (similar)
• 52182dfb-afb7-41db-b4bc-5336cb29b464 (similar)
• e0f8ab85-0ac9-423b-a73a-81b3c7b1aa97 (similar)
• 7b434893-c57d-4f41-908d-6a17bf1ae98f (similar)
• 8518ed3d-f7c9-4601-a26c-f361a4256a0c (similar)
• 42a5f1e7-9603-4f6d-97ae-3f37d130d794 (similar)
• 56454143-524f-49fb-b1c6-3fb8b1ad41fb (similar)
• b6e04788-29e1-4557-bb14-77f761848ab8 (similar)
• a0d7e4d2-bede-4141-8896-bc6e237e977c (similar)
• 297ae038-edc2-4b2e-bb3e-7c5fc94dd5c7 (similar)

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/

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/create_stream_hash/create_stream_hash_file_sharing_domains_download_unusual_extension.yml