Some 75 percent of all new malware that appeared in the third quarter of 2007 were Trojans, according to data from the PandaLabs Q3 2007 report. Trojans are still, by far, the most numerous category of new malware. This is because this type of malicious code is an ideal tool in the new malware dynamic, where cyber-crooks seek to profit from their attacks.
Adware (12%) and worms (11%) were the other categories of malicious code with a significant number of new strains over the last three months.
In terms of the number of infections, Trojans also headed the list. During the third quarter they accounted for 32 percent of malware detected on computers of users of the Panda ActiveScan online scanner. Adware was in second place with an infection ratio of 24 percent.