Banker Trojans, which represented twenty percent of all trojans detected in 2006, are programs designed to intercept access to bank websites and steal the information entered in these pages, such as account numbers, credit card numbers, PINs or passwords. Then, they send this information to the creator of the Trojan so that he can use it for all types of crimes, from stealing money to identity theft.
The Banker family, which accounted for 52.15% of the total, was the most frequently detected variant of banker Trojan. Banbra (39.08%), Goldun (6.32%), Bancos (2.36%), and Banking (0.09%) were the other most frequently detected Trojan families in 2006.
At the moment, it could be said that there is no bank that offers online services whose users could not be affected by the banker Trojans in circulation. Many of these Trojans are variants of other Trojans that have emerged in the past, and give cause for what is known as Trojan families.
Among the most noteworthy banker Trojans of 2006 are some like Banker.CJA. This variant belongs to the family of the same name, and prevents users from accessing the legitimate bank website, showing a spoofed website in its place in order to steal their confidential data. Banker.DJH also controls user access to bank websites, and can capture information from the email accounts of the affected user.