The emperador ransomware group listed Prefeitura Municipal de Arcos on its data leak site on 2026-08-18. Country: BR Sector: Government & Defense Domains named: arcos.mg.gov.br Claim as published on the leak site: We hold complete, unrestricted access to your internal infrastructure. All servers, databases, emails, and admin credentials have been exfiltrated. Critical systems have been encrypted. We have your data. You do not. You have 14 days to respond. No response = data published + permanent loss. Contact us through the provided channel. No third parties. No recovery attempts. [Size: 462.3 MB | Sector: Government]