The money was taken from two Middle Eastern banks by hacking into credit card processing firms and taking money out from ATMs in 27 countries.
Seven men have been arrested in the United States accused of allegedly forming the New York organisation.
An eighth suspect is reported to have been murdered in the Dominican Republic in April.
In just over 10 hours, $45 million from the Bank of Muscat of Oman and the National Bank of Ras Al-Khaimah of the United Arab Emirates was withdrawn in 24 countries involving 36,000 transactions carried out by casher crews.
No individual bank accounts are reported to have been hacked.
Find us on: