RSA researcher Eli Marcus says the "Pandemiya" trojan comprises about 25,000 lines of fresh code. With most malware based on proven platforms, entirely new code is a rarity.
The software is modular and pervasive, and unique thanks to its ability to inject itself into all new processes via the Windows security registry function CreateProcess API.
It even has an upgrade path: Marcuswrites that a $US1,500 version offers basic functions but a $US2,000 cut allows .dll file plug-ins to enhance its functionality. A Facebook attack module is reportedly in the works.
"The advent of a freshly coded new trojan malware application is not too common in the underground," Marcus writes, adding that the modular approach means Pandemiya could become "more pervasive in the near future."
Like other trojans, Pandemiya is foisted on machines through exploit kits and drive-by infections that target vulnerabilities in buggy wares such as Java, Silverlight and Flash.
Marcus speculated the trojan was relatively unknown until now due to its high price and new-kid-on-the-block status compared to the likes of Zeus and Citadel.
The good news is that Pandemiya can be removed with a little registry-tweaking and command line action.