Russian national Alexei Burkov faces a possible sentence of up to 30 years in prison if found guilty in the United States, prosecutors said during his first appearance in court on Tuesday.
The state's prosecutor listed five charges, including conspiracy to commit fraud, "wire fraud" and conspiracy to commit a violation against the United States, with each entailing from five to 30 years in prison as a maximum penalty.
Addressing Burkov, who appeared before the court in jeans and blue pullover, the judge called them "very serious charges".
The Justice Department said in a statement on Tuesday that Burkov may face up to 80 years in prison ''if convicted on all counts''.
The detention hearing for Burkov is scheduled on Friday and until then, he will remain in custody. Currently, he is in the Virginia detention facility.
The Russian Embassy in the United States said on Wednesday it had sent a note of protest to the State Department in connection with the extradition of Burkov from Israel.
The diplomatic mission noted that it consular staff planned to visit Burkov "in the near future".
Burkov was detained in Israel at the request of the United States and accused of money laundering and computer hacking.
Russia has filed charges against him and demanded he be extradited to the country of origin and not the United States.