“The central bank did not say when the heist occurred or how hackers moved the funds. But so far, the attack bears some similarity to a recent string of heists that has targeted the worldwide financial system. In January 2015, hackers got a hold of an Ecuadorian bank’s codes for using SWIFT, the worldwide interbank communication network that settles transactions. In October, hackers used the same technique to slip into a bank in the Philippines. Two months later, hackers tried to make fraudulent requests at a commercial bank in Vietnam. They were stopped. This past February, computer hackers stole $101 million from Bangladesh’s central bank — also by gaining access to SWIFT.”
http://money.cnn.com/2016/12/02/technology/russia-central-bank-hack/index.html