Ukrainian and German law enforcement authorities have identified two Ukrainians suspected of working for the Russia-linked ransomware-as-a-service (RaaS) group Black Basta.

In addition, the group’s alleged leader, a 35-year-old Russian national named Oleg Evgenievich Nefedov (Нефедов Олег Евгеньевич), has been added to the European Union’s Most Wanted and INTERPOL’s Red Notice lists, authorities noted.

“According to the investigation, the suspects specialized in technical hacking of protected systems and were involved in preparing cyberattacks using ransomware,” the Cyber Police of Ukraine said in a statement.