Major financial institutions have been the target of some of the most startling cyber security breaches in recent years. Mobile banking poses a new threat, as malware can specifically target mobile devices to steal banking credentials. In response, the New York Department of Financial Services has issued new cyber security guidance for banks, urging them to improve protections such as multi-factor authentication and incident response plans. Proper cyber governance, insurance, and continual assessment of risks are needed to promote cyber resilience among financial organizations.