Malware
SnipVex
SnipVex is a virus that infects files with .exe extension via prepending itself to the host.
SnipVex is a Windows malware family.
Background
SnipVex is a .NET virus that infects .exe files by prepending its own code to the host file. Its payload is a clipbanker.
Source: Malpedia (Fraunhofer FKIE).