[OCTAGRAM]

I have used patched version of muTorrent. Binary exe contains string private, and I changed it to crivate with hex editor, so that torrent client stops reacting to private flag and starts whistleblowing peers to DHT. I don't think that my client looks unusual.

[ACCount37]

It does. If the tracker is monitoring DHT. Or, more likely, if your client finds a similar "no respect for private flags" DHT peer, sends data to it, and reports that to the tracker.

Does that weird DHT peer report to the tracker? It may not even have an account there. From the tracker's end, that peer is a ghost, and it looks like your client has reported sending data no one ever received.