The attack began Saturday night and by Sunday morning the software firm’s site was completely flooded with requests, Utah-based SCO said.
While infected PCs were supposed to start inundating the main SCO Web site with data starting at 4:09 pm GMT (8:09 am PST), the site had been nearly inaccessible for a 16-hour period prior to the scheduled start of the attack, according to Internet performance measurement firm Netcraft. The outage could have been due to a large number of infected computers having their clocks set to the wrong time.
“This is the biggest single (denial of service) attack ever,” Mikko Hypponen, director of antivirus research at F-Secure, wrote in an update on the security company’s Web site. In its statement on Sunday, SCO it still “had a series of contingency plans to deal with this problem,” but would wait until Monday–at about 5 a.m. PST–to communicate them.
The attack aimed at Microsoft by computers infected with the B variant of MyDoom is not expected to have as much effect because that version hasn’t spread as widely, said Vincent Weafer, a senior director at computer-security company Symantec.
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