Computer experts at Sophos are warning computer users about Trojan horses that try to fool users of a number of banks into entering their account details.
Using a technique similar to phishing, the Troj/Banker-AR Trojan horse and Troj/Banker-K Trojan horse try to steal information from users of a number of Brazilian online banks.
Once a computer is infected with one of the Trojans, Internet activity is monitored and if it is determined that the computer user is visiting one of a number of Brazilian banking web sites, a fake login page is displayed.
Graham Cluley, Senior Technology Consultant for Sophos said,
"The fake forms popped up by the Trojan horses are intended to steal confidential login information such as account numbers and passwords. Unlike traditional phishing attacks the way these Trojan horses work means that the user can have their credentials stolen even if they have visited a legitimate banking site. It's not the web site that tricks them, but the Trojan horse working in the background."
Although these particular Trojan horses only target users of Brazilian banks, Sophos warns that computer criminals can easily adapt the trick for use against any web site.
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