By Robert McMillan

Wed, April 01, 2009 — IDG News Service — The Conficker worm may have infected more machines than previously thought, according to Internet infrastructure provider OpenDNS.

The company said Wednesday that 500,000 of its users have been infected with the latest variant of the worm, called Conficker.C. OpenDNS has more than 10 million users worldwide, the company said.

OpenDNS wouldn't say exactly what percentage of its users were infected by the worm, but the Conficker.C infections it counted were much higher than expected, according to David Ulevitch, the founder of OpenDNS.

Conficker.C began using a new algorithm on Wednesday to look for instructions from its creator, prompting speculation that it might be readying for an attack. According to security experts, however, the worm has been quiet so far.

Continued @ CIO.com