Top ten viruses and hoaxes reported to Sophos in July 2003

July 31, 2003 Sophos Press Release

Sobig family dominates this month's chart

This is the latest in a series of monthly charts counting down the ten most frequently occurring viruses and hoaxes as compiled by Sophos, a global leader in anti-virus protection for businesses.

For July 2003, the chart is as follows, with the most frequently occurring virus at number one:

Position Last
month
Malware Percentage of reports
1NewW32/Sobig-E
   47.8%
21W32/Bugbear-B
   11.0%
33W32/Klez-H
   5.9%
4Re-entryW32/Sobig-A
   2.7%
5=NewW32/Parite-B
   0.9%
5=3W32/Sobig-B
   0.9%
7NewW32/Ganda-A
   0.8%
8=8W32/Opaserv-G
   0.7%
8=NewW32/Sobig-D
   0.7%
8=NewW95/Dupator
   0.7%
Others27.9%

"Forget the Osbournes or the Addams Family - the Sobig family of computer worms, accounting for more than half of all virus reports, is most likely to strike fear into the hearts of IT administrators," said Graham Cluley, senior technology consultant for Sophos Anti-Virus. "The Sobig worms, and some of the other top ten viruses, don't just spread by email. They use a variety of means. This underlines the importance of keeping anti-virus protection up to date at all entry points to the company network."

Sophos detected 625 new viruses, worms and Trojan horses in July. The total number it now protects against is 83,499.

The top ten hoaxes reported to Sophos during July 2003 are as follows:

"An old chain letter promising that Bill Gates will share his personal fortune with anyone who forwards the email onto friends and family has stormed to the top of the chart in July," said Cluley. "Chain letters and hoaxes waste valuable email bandwidth and can scare people into panicking about non-existent virus threats."

Sophos has made available a free, constantly updated information feed for intranets and websites which means users can always find out about the latest viruses and hoaxes.

Graphics of the virus top ten chart are available here.

More information about safe computing, including anti-hoax policies.

Position Hoax Percentage of reports
1Bill Gates fortune

 14.1%
2JDBGMGR

 12.1%
3Hotmail hoax

 10.8%
4Meninas da Playboy

 10.0%
5Bonsai kitten

 5.9%
6Budweiser frogs screensaver

 4.7%
7Free flight

 3.5%
8Frog in a blender/Fish in a bowl

 3.4%
9A virtual card for you

 3.4%
10WTC Survivor

 2.7%
Others29.4%