The medusa ransomware group listed Universitas Matthiae Belii association on its data leak site on 2023-06-25. Country: SK Sector: Education Domains named: umb.sk Claim as published on the leak site: Matej Bel University (commonly referred as Matej Bel or UMB), (Slovak: Univerzita Mateja Bela) is a public research university in the central Slovak town of Banská Bystrica. The university was established in 1992. At the moment, more than 6,000 students are studying at the university.