Top ten viruses reported to Sophos in March 2001

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, a world leader in corporate anti-virus protection.

For March 2001, the chart is as follows, with the most frequently occurring virus at number one:

Position Last
Malware Percentage of reports

"Despite some new viruses receiving a high profile in the media this month the top of the chart is dominated by some familiar faces," said Graham Cluley, senior technology consultant for Sophos Anti-Virus. "It is astonishing that viruses that have been around for months - or even years in the case of Kakworm - are still costing companies money. The message is simple - keep your anti-virus software up-to-date and ensure you have installed the latest security patches."

Notable new viruses in March included Magistr, Naked Wife and two new Linux viruses - Lion and Lindose (aka the Winux virus). March also saw the second anniversary of the Melissa virus which was written and released by David L. Smith. Following high profile virus attacks at the start of the year Sophos published new versions of its safe computing guidelines, one aimed at network administrators and one with simple steps the everyday user can take.

867 new viruses were discovered and protected against by Sophos during March 2001.

The total number of viruses Sophos detects and protects against is 61,893.

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.

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