The thegentlemen ransomware group listed Keifert on its data leak site on 2026-07-07. Country: DE Sector: Manufacturing Domains named: keifert.de, zoominfo.com, experience.they, region.as Claim as published on the leak site: ***.de zoominfo.com/c/keifert-gmbh/429980133 Keifert GmbH master-certified building cleaning company based in Schallstadt, Germany, with over 35 years of industry experience.They offer a comprehensive range of professional services, including office, industrial, and specialized cleaning, as well as janitorial services across the Southern Baden region.As a quality-focused enterprise, the company is certified according to DIN EN ISO 9001 and 14001 standards, ensuring reliable and environmentally conscious solutions for their clients