Trojan blocks access to The Pirate Bay and Mininova

TorrentFreak reports an unusual Trojan ( Troj / Qhost-AC according to Sophos version), which writes 127.0.0.1 to the hosts file for The Pirate Bay, Suprbay (Pirate Bay Forum) and Mininova. One of the readers told TorrentFreak that he picked up a "contagion" from the keygen downloaded from TPB.