The dragonforce ransomware group listed HARTMANN BAU on its data leak site on 2026-03-18. Country: DE Sector: Manufacturing Domains named: hartmann-bau.ch Claim as published on the leak site: Hartmann Bau GmbH is a construction company based in Borgentreich near Kassel, specializing in residential, commercial, agricultural, and civil engineering projects in the Paderborn, Höxter, and Kassel areas. With over 80 years of experience, the company emphasizes quality, timely completion, and customer satisfaction as the foundation for successful construction projects. They offer a comprehensive range of services from planning to key handover, ensuring adherence to high standards and legal requirements. Their team is equipped to handle diverse projects, including offices, housing, barns, and warehouses, tailored to clients' specific needs