The Top 10 Viruses - March 2000

April 06, 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.