Recently PandaLabs discovered a specialized tool for converting a Trojan to a Worm. Tools like these are not new and have been around for some time being made available in underground forums that are frequented by Script Kiddies and novice hackers.The danger with this specific kit is the ability to take a banker Trojan and make it a worm, almost instantly.
Hackers produce these malware building kits as a way to distract officials from clever and highly sophisticated targeted attacks against commercial entities. The more malware in the wild, the better as that creates a level of noise the anti-virus labs have to deal with.
Essentially the volume of new and unique malware has increased over the last year from simply being a few hundred thousand to that of a few million.