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18 July 2001

Sophos six-month summary of virus activity

Record number of new viruses detected and protected against by Sophos in the last six months

Sophos, a world leader in corporate anti-virus protection, has announced that it has detected and protected against 6,127 new viruses in the first six months of 2001. In the same period, calls to Sophos's customer helpdesk suggested that those viruses which demanded the most media attention were not necessarily those causing the biggest problem.

Sophos's research highlights the importance of safe computing practices and the need to keep anti-virus software up to date.

For the first six months of 2001, the top ten viruses (as recorded by Sophos's helpdesk) are as follows, with the most frequently occurring virus at number one:

Position Malware Percentage of reports
1W32/Magistr-A
   12.7%
2VBS/VBSWG-X
   11.9%
3W32/Apology-B
   10.1%
4W32/Hybris-B
   9.3%
5VBS/SST-A
   7.0%
6VBS/Kakworm
   6.7%
7W32/Navidad-B
   6.1%
8W32/Badtrans-A
   3.8%
9W32/Flcss
   2.2%
10VBS/LoveLet-AS
   1.8%
Others28.4%

"The highly destructive Magistr worm accounted for more reports to our support desk than higher profile viruses such as Homepage and Anna Kournikova," said Graham Cluley, senior technology consultant for Sophos Anti-Virus. "Magistr sends itself using emails with randomly generated subject lines and text, making it difficult for some people to spot - its dominance underlies the fact that users are persisting in opening unsolicited attachments. However, if you are using up-to-date anti-virus software you should have no problems with this virus."

In runner-up position the Homepage worm spread rapidly around the world in May 2001, redirecting infected users to pornographic websites.

At number three in the chart, the Apology worm is particularly devious since it prevents access to websites containing anti-virus information and blocks emails to anti-virus companies, another reminder that users should regularly update their AV software.

Despite the media frenzy surrounding its arrival, the Anna Kournikova worm came only fifth in the top ten, accounting for 7% of all calls. The Kournikova worm proved to be something of a "shooting star", infecting millions of people over a few days, but rapidly dying away.

Other developments in the first six months of 2001 included:

  • USA number 1 for malware and spam
  • Huge surge in email attachment attacks
  • Scareware makes users buy bogus products

About Sophos

Sophos enables enterprises all over the world to secure and control their IT infrastructure. Sophos's network access control, endpoint, web and email solutions simplify security to provide integrated defenses against malware, spyware, intrusions, unwanted applications, spam, policy abuse, data leakage and compliance drift. With over 20 years of experience, Sophos protects over 100 million users in nearly 150 countries with its reliably engineered security solutions and services. Recognized for its high level of customer satisfaction and powerful yet easy-to-use solutions, Sophos has received many industry awards, as well as positive reviews and certifications.

Sophos is headquartered in Boston, US and Oxford, UK. More information is available at www.sophos.com