Top ten viruses and hoaxes reported to Sophos in May 2003

May 30, 2003 Sophos Press Release

New entries Sobig-B and Fizzer dominate this month's chart

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

Position Last
Malware Percentage of reports

"May saw two new entries at the top of the chart - Sobig-B and Fizzer," said Graham Cluley, senior technology consultant at Sophos Anti-Virus. "Disguised as a message from Microsoft technical support, Sobig-B spreads quickly via email and network shares. Fizzer, meanwhile, exploited email and the KaZaA file-sharing network. Both of these prove that it isn't enough just to block your email gateway - companies should ensure the virus protection on their desktops is automatically updated."

Sophos detected 611 new viruses, worms and Trojan horses in May. The total number it now protects against is 82,048.

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

"A chain letter claiming to offer a free Nokia mobile phone has stormed to the very top of the hoax charts this month," said Cluley. "The Nokia Giveaway chain letter has even managed to topple JDBGMGR, one of the most persistent hoaxes of all time."

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
1Nokia giveaway


3Meninas da Playboy

4Hotmail hoax

5WTC Survivor

6Budweiser frogs screensaver

7Bonsai kitten

8A virtual card for you

9Frog in a blender/Fish in a bowl

10Applebees Gift Certificate