An hour later, SCO removed the site from the Internet's global directory, and later advised customers and business partners that its address had been changed from www.sco.com to www.thescogroup.com. The attack on the original site was set to continue until Feb. 12.
The success of the assault demonstrates that any company's web site is vulnerable to viruses capable of turning infected machines into zombies ready to perform the bidding of the malicious code's author.
"We have never seen an attack on this scale from a virus, because we've never seen a virus infect so many machines," Craig Schmugar, virus research manager at anti-virus software maker Network Associates Technology Inc., said Monday. "For any business out there, including some very large web sites, if enough machines are attacking, it's going to have an ill effect."
Options companies have in fending off a denial of service attack include increasing bandwidth to handle the spike in traffic, experts say. However, that option is expensive and may not be feasible for many companies.