A Ukrainian man was sentenced to more than 13 years in prison in Texas on Wednesday for his role in ransomware attacks by the notorious Russia-based REvil hacking group, the US Justice Department said. Vasinskyi, also known as Rabotnik, was sentenced to 13 years and seven months in prison and ordered to pay $16 million in restitution for his involvement in more than 2,500 ransomware attacks.