One of the most dangerous trojans around, named Zeus, steals users’ banking account information — and now it’s taking aim at Firefox users for the first time. One security company, called Trusteer, states that the trojan has cracked Firefox security. Here is the scary part:

Trusteer describes this as a ‘unprecedented rate of distribution’, which is probably not an unfair characterisation given the malware’s known tendency to deliberately under-infect available victims as a way of staying out of the detection range of honeypots. Variants of Zeus also have a history of evading many antivirus scanners when they first appear.”We expect this new version of Zeus to significantly increase fraud losses, since nearly 30 percent of internet users bank online with Firefox and the infection rate for this piece of malware is growing faster than we have ever seen before,” said Trusteer’s CTO, Amit Klein.

Now one does have to ask. When will Mozilla be patching its browser? How effective will any patching be against such a virulent trojan?

Comments welcome.

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