A hacker group has stolen as much as $1 billion from banks and other financial companies worldwide since 2013 in an unprecedented cyber-robbery, according to a report by computer security firm Kaspersky Lab. The gang, Carbanak, has targeted as many as 100 banks, e-payment systems and other financial institutions in 30 countries and is still active. The criminals infected bank employees’ computers with malware, which then spread to internal networks and enabled video surveillance of staff. That let fraudsters mimic employee activity to transfer and steal money. The gang also used access to banks’ networks to seize control of ATMs and order them to dispense cash to henchmen. Detailed information about the investigation can be found in this blog post and Kaspersky's full report.