The FBI has offered a $3M reward for information on Russian hacker Evgeniy Bogachev, who allegedly stole more than $100M last year in a major cyber crime operation.

This is the largest amount that US authorities have ever offered in a cyber crime case, and Bogachev is one of the FBI’s most wanted cyber criminals.

Also known as ‘lucky12345’ and ‘slavik’, Bogachev is accused of running last year’s GameOver Zeus attack, which is thought to have infected more than one million computers worldwide. The attack tricked users into downloading malware, which was then used to steal bank account numbers, passwords, personal identification numbers, and other information necessary to log into online banking accounts.

Evgeniy Bogachev was charged last year on counts including conspiracy, wire, bank and computer fraud, and money laundering.

Although the reward is high, finding and arresting him may be more difficult because the US does not have an extradition treaty with Russia, which is where the criminal is believed to be.