SCO has noticed that its Web site performance has intermittently slowed, but it is too early to say if there is an attack on the site, said SCO spokesman Blake Stowell. "It may be showing the early stages of a DOS attack," he said. SCO has enraged the open source community by claiming that the Linux operating system contains software that violates SCO's intellectual property, and has been the subject of various attacks on its Web site.
The Mydoom worm so far has spread mostly in the U.S., after it was first detected in Russia, e-mail filtering company MessageLabs Inc. reported on its Web site late Monday night. Information from Trend Micro at the same time showed the worm is also spreading in Australia, New Zealand and Japan.
Antivirus software vendors urge users to update their antivirus software and be careful when opening e-mail attachments. "If you're not expecting an e-mail, don't open it," Symantec's Ruckman said.
Network Associates' Gullotto expects the worm to keep causing headaches for a while. "It will be a couple of days before we're going to get to the point that it won't have any impact. It has a full head of steam, there are hundreds of thousands of e-mails and we may see well into the millions (of e-mails), and possibly hundreds of thousands of machines infected," he said.
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