eBay users are being targeted by an advanced Trojan that attempts to redirect traffic so it can silently bid on a car from the auction site's car site, Symantec is warning. It is the latest security headache for eBay, which has faced an onslaught of complaints from some users who say fraud on the site has increased to unacceptable levels over the past few months.

eBay officials are aware of the Trojan and are working with Symantec to prevent it from affecting buyers and sellers, a spokeswoman said.

Trojan.Bayrob implements a proxy server so that traffic intended for eBay is instead sent to one of several sites controlled by the attacker. Traffic is redirected by changing settings corresponding to at least six eBay URLs in the victim's hosts file. Once connected to rogue servers, Bayrob is programmed to download configuration data, including a variety of php scripts.

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