More than a million users of social networking site MySpace.com and other websites may have been infected with adware spread by an internet banner advert.
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The warning has come from internet security software company iDefense, which said the advert was for a site called Deckoutyourdeck.com.
The security company said the ad appeared in user profiles on MySpace.com, which has around 70 million users.
The ad exploits a problem related to the way Microsoft’s Internet Explorer browser handles WMF image files. Despite Microsoft issuing a patch in January, over one million end-users were infected with the adware, said iDefense.
Around 600 websites are thought to exploit the vulnerability and end-users continue to become infected after visiting them. A visit to a web page via the Deckoutyourdeck banner ad downloads a Trojan, which then contacts multiple websites to download other unwanted programs to the infected machine.
iDefense said the adware was being distributed from a server located in Turkey.
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