The attacker was a 'state-sponsored actor,' and stolen information may include names, e-mail addresses, phone numbers, dates of birth, encrypted passwords and possibly security questions and answers
Bank hacks in Vietnam and Bangladesh have sparked concerns within global banks, some of which are privately pressing the Swift interbank network to shore up security at its 11,000 members.
The attack may be part of a growing number of breaches where hackers post large stolen databases to embarrass companies and shame them for having poor security or other perceived transgressions.
Russian computer attacks have become more brazen and more destructive as the country grows increasingly at odds with the U.S. and European nations over military goals first in Ukraine and now Syria.
The Jeep Cherokee brought to a halt by hackers last week exposed wireless networks as the weakest link in high-tech vehicles, underscoring the need to find fast over-the-air fixes to block malicious intrusions.