The deadlock ransomware group listed FIRESTA on its data leak site on 2026-07-10. Country: CZ Sector: Manufacturing Domains named: www.firesta.cz Claim as published on the leak site: Firesta-Fišer, a.s. is a Czech construction company based in Brno, established in 1990, specializing in transport infrastructure, including bridge, road, and railway construction. With over 600 employees, the company also operates in Slovakia, Poland, and Romania.