Mass-mailers and Trojans remain biggest threat to small firms

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Mass-mailers and Trojans remain biggest threat to small firms

John-Paul Kamath

Mass mailers and Trojans continue to be the biggest threats to consumers and small and medium-sized enterprises, according to BitDefender Labs' malware report for the first half of 2007. The Peed Trojan is the top threat to date in 2007, variants of which accounted for more than 30 per cent of all threats detected.

Trojans have proven to be the most popular type of malware this year with a generic behavior-based Trojan signature coming in second on the top 10 list.

Behaviour-based Trojans are generally detected and blocked proactively, before being assigned names and specific signatures. These proactive behaviour-based detections made up 21.4% of total detections.

Another notable threat detected by BitDefender Labs is the Win32.Sality.M virus, the only true virus to make the list. While the highly-dangerous polymorphic virus spreads using the Bagle mass mailer as one of its vectors, the Bagle virus alone did not make the 2007 list.

BitDefender's top 10 malware list for the first half of 2007

1. Trojan.Peed.Gen

2. BehavesLike:Trojan.Downloader

3. Win32.Netsky.P@mm

4. Trojan.Peed.A

5. Win32.NetSky.D@mm

6. Win32.Nyxem.E@mm

7. Win32.Sality.M

8. GenPack:Trojan.Downloader.Tibs.I

9. Trojan.Peed.P

10. Win32.Netsky.AA@mm





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