Ernest Käslin

Ernest Käslin was compromised in a ransomware attack attributed to worldleaks in December 2025. The organization, operating in an undisclosed sector in Switzerland, was added to the group's data leak site as part of an extortion campaign.

worldleaks 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.