unimed.coop.br

unimed.coop.br was compromised in a ransomware attack attributed to lockbit3 in March 2025. The organization, operating in an undisclosed sector in Brazil, was added to the group's data leak site as part of an extortion campaign.

lockbit3 operates as a financially motivated ransomware-as-a-service (RaaS) operation, exfiltrating sensitive data and threatening public disclosure to pressure victims into paying ransom demands.

Unimed is a Brazilian medical work cooperative and health insurance operator. It is considered the largest of its kind in the world, with more than 105,000 affiliated physicians, 386 branches and more than 15 million beneficiaries. Its name is a comp...