The company contends that virus writers are busy building an underground network for rapid dispersal of new viruses.

Sinit, which is like a viral version of the Kazaa file sharing system, effectively removes the single point of failure that is often targeted by law enforcers to terminate malware attacks such as the Sobig virus.

With Sinit, each infected host becomes part of a peer-to-peer network through which additional trojans can spread to all other hosts. Such a network constitutes a launch pad for what could be a highly efficient superworm, the filterware vendor said.

The Sinit program has been circulating on the Internet since late September. It is particularly prevalent on machines that have been hijacked to serve pop-up advertisements or to download porn-dialers.

This article is based on material originally produced by ComputerWire.