While it is necessary to increase the overall awareness among all employees, it is imperative that a small section of employees are groomed to handle higher end security concerns, including digital forensics. Unless banks are able to have strong internal security teams, their position would be weak. Unlike other technology related activities, no organisation can afford to outsource its entire security.
Banks have to take up measures to recruit and retain the right talent. More importantly, they should keep the security skills sets always alert and up to date in a world of constant threats by a more motivated group of skilled attackers. The challenge is that there is no readymade skill set in the market too.