The U.S. has increased cyber aid to Ukraine after Russia-linked cyberattacks on power grids in 2015 and 2016.
The agreement comes as the ex-Soviet countries look to disentangle themselves from Russian electric infrastructure.
U.S. investments in stemming cybercrime at home and abroad are falling short, according to the think tank Third Way.
The State Department will double the aid to $10 million.
At least $100 million in funding specifically to counter Russian information operations will be available under a newly unveiled spending bill to keep the U.S. government running until the end of September.