Business Email Compromise (BEC) scams are more versatile and adaptive than more traditional malware-based scams.

The FBI today warned about a significant spike in victims and dollar losses stemming from an increasingly common scam in which crooks spoof communications from executives at the victim firm in a bid to initiate unauthorized international wire transfers. According to the FBI, thieves stole nearly $750 million in such scams from more than 7,000 victim companies in the U.S. between October 2013 and August 2015

http://krebsonsecurity.com/2015/08/fbi-1-2b-lost-to-business-email-scams/