Torrent Auto Uploader relies on torrent clients to transfer content. The three sites in question all use rTorrent clients with a ruTorrent Web UI. We know this because the researcher sent over a whole bunch of screenshots and supporting information which confirms access to the torrent clients as well as the Torrent Auto Uploader software. The image [here] shows redactions on the tracker tab for good reason. In a regular setup, torrent users can see the names of the trackers coordinating their downloads. This setup is no different except that these URLs reference three different trackers supplying the content to one of the three compromised sites.
Rather than publish a sequence of completely redacted screenshots, we'll try to explain what they contain. One begins with a GET request to another tracker, which responds with a torrent file. It's then uploaded to the requesting site which updates its SQL database accordingly. From there the script starts checking for any new entries on a specific RSS feed which is hidden away on another site that has nothing to do with torrents. The feed is protected with a passkey but that's only useful when nobody knows what it is. The same security hole also grants direct access to one of the sites tracker 'bots' through the panel that controls it. Then there's access to 'Staff Tools' on the same page which connect to other pages allowing username changes, uploader application reviews, and a list of misbehaving users that need to be monitored. That's on top of user profiles, the number of torrents they have active, and everything else one could imagine. Another screenshot featuring a torrent related to a 2022 movie reveals the URL of yet another third-party supplier tracker. Some basic queries on that URL lead to even more torrent sites. And from there, more, and more, and more -- revealing torrent passkeys for every single one on the way.
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