A Massachusetts man was sentenced to 21 months in prison for taking part in a cybercrime scheme that hacked accounts at banks, brokerage firms and government agencies in an attempt to steal more than $15 million.

Robert Dubuc, 41, pleaded guilty to wire fraud conspiracy, conspiracy to commit access device fraud and identity theft in federal court in New Jersey in April.

A co-defendant, Oleg Pidtergerya, pleaded guilty to the same charges and is scheduled for sentencing in December.

Prosecutors said the two men were members of an international cybercrime ring led by Oleksiy Sharapka and Leonid Yanovitsky of Kiev, Ukraine, who have also been indicted but have not been caught.

The group hacked into accounts in 2012 and 2013 at global banks and other institutions, including Citigroup, JPMorgan Chase, the US Department of Defence, PayPal and others, and diverted funds into accounts and debit cards they controlled, prosecutors said.

The group used “cash out” crews to withdraw cash from ATMS and making fraudulent purchases, according to prosecutors. Dubuc ran the Massachusetts crew, while Pidtergerya led a crew in New York.

Eight individuals have been charged in the case.