A new threat named "Warezov Trojan horse" has hit the leading VOIP service provider Skype, the target Skype user receives a message stating "Check up this" and a link to the infected file "file_01.exe" with the Trojan payload, once a user is fooled into downloading this malicious file more files are downloaded automatically and installed. The infected computer now acts as the propagator and all their contacts are sent the same message to spread the Trojan.