A trojan detected as Troj/Qhost-AC is stopping users to connect on peer-to-peer (P2P) websites according to a blog entry yesterday at Sophos.
The article includes a screenshot of the Trojan file. The file modifies the HOSTS file and it also includes a profanity.
CheeHui of Sophos notes that it is unusual to see a Trojan like this since, although it denies infected machines on connecting to P2P sites, it does not do anything else. Trojans are known to redirect banking sites.