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

July 03, 2000 Sophos Press Release

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.