The qilin ransomware group listed LEYHAUSEN Research on its data leak site on 2025-10-15. Country: DE Sector: Professional Services Domains named: www.leyhausen.com Claim as published on the leak site: Leyhausen Research GmbH is a leading provider of global field services since 1996, headquartered in Leverkusen, Germany. The company operates state-of-the-art facilities and call centers across Europe, the Middle East, India, and Africa, offe ...