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.
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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