The Top 10 Viruses - March 2000

Sophos Press Release

As compiled by Sophos Anti-Virus

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

Position Last
month
Malware Percentage of reports
16W32/Pretty
   25.6%
2NewVBS/Kakworm
   7.9%
34WM97/Ethan
   5.4%
42WM97/Marker-O
   5.0%
5=3=Troj/Mine
   4.6%
5=7W32/Ska-Happy99
   4.6%
7=5WM97/Thursday
   2.9%
7=Re-entryWM97/Titch
   2.9%
9NewWM97/Proverb-A
   2.1%
10NewWM97/Ethan-CC
   1.7%
Others37.3%

"Word macro viruses continue to dominate most of the chart, but this month has seen a resurgence in popularity for a file virus which honours the cartoon series South Park," comments Graham Cluley, head of corporate communications for Sophos Anti-Virus. "W32/Pretty is a worm that spreads via internet relay chat (IRC) and email. Users are receiving emails with an icon of Kyle from South Park and assuming the attached program is a harmless game. In fact, the icon masks the W32/Pretty virus."

More details on the W32/Pretty virus (and a snapshot of Kyle) are available from W32/Pretty virus analysis page.

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 at Sophos Image gallery.

More than 100 million users in 150 countries rely on Sophos’ complete security solutions as the best protection against complex threats and data loss. Simple to deploy, manage, and use, Sophos’ award-winning encryption, endpoint security, web, email, mobile and network security solutions are backed by SophosLabs - a global network of threat intelligence centers. Sophos is headquartered in Oxford, U.K., and is publicly traded on the London Stock Exchange under the symbol “SOPH.” More information is available at www.sophos.com/company.