Ukrainian authorities say they have taken down a pro-Russia hacking group that compromised user accounts and then sold them for profit on dark web portals.

According to the cyber department of Ukraine’s Security Service (SSU), the hackers targeted user accounts of individuals in Ukraine and across Europe.

Leveraging the unauthorized access, the hackers harvested the personal information of their victims and then offered the data for sale on the dark web, receiving payments via multiple electronic platforms, including YuMoney, Qiwi, and WebMoney, which are prohibited in Ukraine.

SSU estimates that the hacking group had sold roughly 30 million user accounts, making a profit of roughly $375,000.