The Ten Most Dangerous Viruses of 2002
Posted on 02.01.2003
Panda Software, leading antivirus software developer, has published a list of the ten most prevalent viruses in 2002 based on the data compiled from Panda ActiveScan, the free, online antivirus.

There's no doubt that this year's most virulent malicious code has been Klez.I, responsible for nearly 18 percent of all infections. This ruthless virus uses a two-pronged attack. On the one hand using 'social-engineering' under a multitude of guises, to trick users, and on the other exploiting a known vulnerability in Microsoft Internet Explorer to run automatically when viewed in the Preview Pane.

In second place, although responsible for less than five percent of total infections, comes Bugbear. This worm exploits the same vulnerability as Klez.I and is able to block certain application processes including those of some antiviruses and personal firewalls. It also opens port 36794 on the computer under attack to create a backdoor that could be used by a hacker to gain remote access to the computer or network.

Right behind Bugbear comes Elkern.C. The prevalence of this virus throughout 2002 is due largely to the fact that it is installed on computers by the Klez.I worm.

The tenacious Nimda, the culprit in just over three percent of cases, holds fourth place in the Top Ten list. This virus was first detected in September 2001 when it reached epidemic proportions. Its persistence is largely due to its exploiting of both an Internet Explorer vulnerability (the same one asexploited by Klez.I) and a flaw affecting Microsoft IIS, allowing Nimda to infect both directly and indirectly, via Internet downloads.

In fifth place is Sircam, which has appeared in nearly all monthly rankings of virulent malicious code since August 2001, no doubt due to its cunning use of social engineering techniques.

The remaining five viruses to make up this year's ranking are Grade.A, Help, Magistr.B, Klez.F and the PSW/Bugbear Trojan horse. Despite seemingly low infection rates -all of them were responsible for less than three percent of total infections- the continuous appearance of such viruses once again highlights the need for users to take the protection of their IT resources seriously.



Ranking Name Percentage frequency
1 W32/Klez.I 17.96%
2 W32/Bugbear 4.41%
3 W32/Elkern.C 3.70%
4 W32/Nimda 3.22%
5 W32/Sircam 2.94%
6 W32/Grade.A 2.91%
7 VBS/Help 2.72%
8 W32/Magistr.B 2.63%
9 W32/Klez.F 2.47%
10 Trj/PWS.Bugbear 2.30%





Spotlight

Whitepaper: Zero Trust approach to network security

Posted on 20 November 2014.  |  Zero Trust is an alternative security model that addresses the shortcomings of failing perimeter-centric strategies by removing the assumption of trust.


Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.
  



Daily digest

Receive a daily digest of the latest security news.
  

DON'T
MISS

Fri, Nov 21st
    COPYRIGHT 1998-2014 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //