UMBERG TREUHAND AG

UMBERG TREUHAND AG was compromised in a ransomware attack attributed to bravox in March 2026. The organization, operating in an undisclosed sector in Switzerland, was added to the group's data leak site as part of an extortion campaign.

bravox 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.

The company provides tax optimization consulting for individuals, businesses, and public organizations.