The medusa ransomware group listed SIGMA on its data leak site on 2023-05-22. Country: US Sector: Technology Domains named: sigmaco.com Claim as published on the leak site: SIGMA is a company located at 4915 Ambroise Lafortune Ste 100, Boisbriand, Quebec, J7H 0A4, Canada, providing IT services specializing in the development and implementation of an integrated management system (IMS) for manufacturing (MRP/ERP) and distribution companies.