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3 July 2000

Top ten viruses reported to Sophos Anti-Virus in June 2000

This is the latest in a series of monthly charts counting down the ten most frequently occurring viruses as compiled by Sophos, worldwide leaders in anti-virus protection.

For June 2000, the chart is as follows, with the most frequently occurring virus at number one:

Position Last
month
Malware Percentage of reports
12VBS/Kakworm
   28.5%
2NewVBS/Stages-A
   16.9%
31VBS/LoveLet
   7.4%
49WM97/Melissa
   3.2%
54W32/Ska-Happy99
   2.8%
6Re-entryWM97/Marker-C
   2.5%
7=NewTroj/Sub7-21B
   2.1%
7=NewXM97/Yawn-A
   2.1%
7=6WM97/Marker-O
   2.1%
7=Re-entryWM97/Class-D
   2.1%
Others30.3%

"Although the Life Stages worm proved prevalent in June, the Kakworm continues to be the most commonly encountered virus worldwide," said Graham Cluley, head of corporate communications for Sophos Anti-Virus. "The tragedy is that Microsoft released a patch to protect against Kakworm last year - clearly a lot of people have still not bothered to implement it."

VBS/Kakworm exploits security vulnerabilities in Microsoft Internet Explorer and Microsoft Outlook which mean it is possible to be infected just by reading an email, rather than by launching an attached file.

More details on VBS/Kakworm and how to protect against it are described here.

Compiled by Sophos's technical support team, the top ten chart is collated from calls to Sophos's 24 hour, 365 days a year technical support line.

Graphics of the above Top Ten chart are available here.

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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