International malware statistics from October

Trojans consisted 26 percent of infections and adware 23 percent of them in October.

PandaLabs leader Luis Corrons says that trojans can be widely used for criminal purposes because they can bring significant amount of money to their creators. This is possible either straight via identity thefts which can be used in net frauds or indirectly by charging advertisers from spams sent via botnets.

After trojans and adware, third most popular group were worms (8,3 %).

This malware type is getting more rare because malware creators are motivated by money. Worms were responsible for some of the worst virus epidemics in the past but they are now seemingly decreasing.

Other malware types were backdoors (4 %), spyware (3 %), dialers (3 %) and bots (2 %).

International malware statistics, October 2007

1. Trojan Downloader.MDW
2. Adware PC-Prot, new
3. Trojan Downloader.OZB
4. Trojan Lineage.BZE, new
5. Worm IRCbot.BEP
6. Worm Brontok.H
7. Worm Puce.E
8. Backdoor Hupigon.AZG, new
9. Trojan Dropper.UN, new
10. Worm Sdbot.ftp, new

Source: Panda