Re: P2p virus antinny
I remember a Kazaa virus a long time ago that did this. It was actually pretty simple, it would create its own folder, copy itself to that folder under various names (wincrack.exe, setup.exe etc...) and simply add the folder to the other file sharing folders (which at the time were basically stored in the registry, unencrypted) and people would download it thinking it was something else.
It's a bit more complicated than that these days with Torrents, encryption an so on. But I'm sure there's techniques they can adopt that work similar.