Remote AppX Package Downloaded from File Sharing or CDN Domain

title: Remote AppX Package Downloaded from File Sharing or CDN Domain
id: 8b48ad89-10d8-4382-a546-50588c410f0d
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status: test
description: |
    Detects an appx package that was added to the pipeline of the "to be processed" packages which was downloaded from a file sharing or CDN domain.
references:
    - https://www.sentinelone.com/labs/inside-malicious-windows-apps-for-malware-deployment/
    - https://learn.microsoft.com/en-us/windows/win32/appxpkg/troubleshooting
    - https://news.sophos.com/en-us/2021/11/11/bazarloader-call-me-back-attack-abuses-windows-10-apps-mechanism/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-01-11
modified: 2026-03-29
tags:
    - attack.stealth
logsource:
    product: windows
    service: appxdeployment-server
detection:
    selection:
        EventID: 854
        Path|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'
            - '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'
    condition: selection
falsepositives:
    - Unlikely, unless the organization uses file sharing or CDN services to distribute internal applications.
level: high