Cyber attacks targeting the global bank transfer system have succeeded in stealing funds since February’s heist of $81 million from the Bangladesh central bank as hackers have become more sophisticated in their tactics, according to a SWIFT official and a previously undisclosed letter the organization sent to banks worldwide.
https://it.slashdot.org/story/16/12/13/1441222/swift-confirms-new-cyber-thefts-hacking-tactics
http://www.reuters.com/article/us-usa-cyber-swift-exclusive-idUSKBN1412NT