What does the virus Win32/Polycrypt do?
The polycrypt is a type of trojans the adware creators are using. A description of one of them: Packed.Win32.PolyCrypt.a (Kaspersky) This Trojan may be downloaded by other malware. When executed, it may download possibly malicious files from several Web sites. The downloaded files, however, may vary depending on the the file where the download URLs point to.
