It appears that hackers have come up with a new way to attack website such as eBay, although reports are widespread that sites such as Autotrader and even the London Stock Exchange have been affected.
Rather than attack the site directly the hackers have attacked the banner ads displayed on these sites through advertising networks. The adverts attempted to redirect users through a number of links eventually attempting to sell fake anti-virus software. Other than the banner adverts no other parts of any of the affected sites were compromised.
This must now be a worry for any website who display compromised syndicated adverts. By attacking third party ad networks it gives cyber criminals a much larger reach than attacking any individual network can, and until the sites were blocked by browser malware black lists users were reliant on their own anti-virus software to protect them.
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