Unusual File Download From File Sharing Websites - File Stream — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: medium. Source dates: 2022-08-24 / 2026-03-29.

{
  "product": "windows",
  "category": "create_stream_hash"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 8829ebe41ec8913ad527d014f8a4b1f2cfb5fca749282542e97985b0bcfb9ec6

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Unusual File Download From File Sharing Websites - File Stream
id: ae02ed70-11aa-4a22-b397-c0d0e8f6ea99
related:
    - id: 8b48ad89-10d8-4382-a546-50588c410f0d
      type: similar
    - id: d635249d-86b5-4dad-a8c7-d7272b788586
      type: similar
    - id: 52182dfb-afb7-41db-b4bc-5336cb29b464
      type: similar
    - id: e0f8ab85-0ac9-423b-a73a-81b3c7b1aa97
      type: similar
    - id: 7b434893-c57d-4f41-908d-6a17bf1ae98f
      type: similar
    - id: 8518ed3d-f7c9-4601-a26c-f361a4256a0c
      type: similar
    - id: 42a5f1e7-9603-4f6d-97ae-3f37d130d794
      type: similar
    - id: 56454143-524f-49fb-b1c6-3fb8b1ad41fb
      type: similar
    - id: b6e04788-29e1-4557-bb14-77f761848ab8
      type: similar
    - id: a0d7e4d2-bede-4141-8896-bc6e237e977c
      type: similar
    - id: 297ae038-edc2-4b2e-bb3e-7c5fc94dd5c7
      type: similar
status: test
description: Detects the download of suspicious file type from a well-known file and paste sharing domain
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/
author: Florian Roth (Nextron Systems)
date: 2022-08-24
modified: 2026-03-29
tags:
    - attack.stealth
    - attack.s0139
    - attack.t1564.004
logsource:
    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_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source 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/