Trojan Virus from Torrent Sites

From Lifehacker:

BitTorrent weblog TorrentFreak reports on a new piece of malware with a strange bent: If it infects your computer, this trojan will prevent you from accessing popular BitTorrent sites The Pirate Bay and Mininova. It does so by modifying the hosts file on your computer. We've shown you how to use the power of the hosts file for good by banning time-wasting web sites or setting up universal ad blocking through your router, but this novel new trojan adds the unfriendly blocks to your hosts file. If by chance you've been affected, check out the TorrentFreak post for more details.