Cyber attacks

Outsiders gained access to customer information at Southern National Bancorp of Virginia using a malicious email. Other financial institutions, meanwhile, are implementing policies in hopes of avoiding the same fate.

It's been a decent year for banks, especially given the industry's return on assets hit a 10-year high. But there are signs it might not last. With Halloween near, here is a look at some potentially frightening developments that could keep bankers up at night.