Security Experts from Websense have said that more than 40,000 sites have been infected from a malicious code that installs malware on users machines that visit multiple sites. Beladen.net is one of the internet domains that unleashed the attacks on unpatched versions of IE, Firefox and Quicktime. A piece of hidden javascript is different enough to make it hard to spot by security programs. According to the experts it may have happened using keyloggers on site administrators computers.

“The compromised websites are operated mostly by smaller businesses and government agencies, and so far Websense researchers have been unable to identify a common component that is being targeted. That leaves them guessing that the sites were penetrated by sneaking key-logging programs onto the PCs of people who maintain the sites, Stephan Chenette, manager for security research at Websense, told The Register.”

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