The rhysida ransomware group listed M.C.S. Steel Public Company Limited on its data leak site on 2026-11-09. Country: TH Sector: Manufacturing Domains named: disclosures.chairman Claim as published on the leak site: M.C.S. Steel Public Company Limited M.C.S. Steel Public Company Limited - largest structural-steel fabricatorin Thailand, SET-listed (ticker MCS).Total files: 2,314,625Total volume: 4.2 TB'Senior Advisor to Chairmen of the Board' paid 800,000 JPY/month viaTrust Engineering K.K. (Tokyo) to Keiyo Bank Chiba account 5376091,term Nov-2025..Oct-2027 - while Mr. Yokoyama Yukio also sits on MCSpayroll. Related-party flow outside SET disclosures.Chairman & CEO Dr. Naiyuan Chi carries a PAYROLL 'advisor'