The akira ransomware group listed Sieger design on its data leak site on 2025-12-05. Country: DE Sector: Professional Services Domains named: sieger-design.com Claim as published on the leak site: Sieger design specializes in developing comprehensive brand strat egies and distinctive products that are significant and success-o riented. We are ready to upload corporate data. Internal business files, f inancials and so on.