The aoqin ransomware group listed Sistel on its data leak site on 2026-11-05. Country: BR Sector: Technology Claim as published on the leak site: Fundação Sistel de Seguridade Social offers a range of services including previdência (pension plans) and assistência médica (medical assistance) aimed at providing social security solutions. Their intended clients include individuals seeking financial security and healthcare support. The company also provides additional services such as loan simulations and preventive health packages. With a focus on user experience, they ensure access to a network of accredited healthcare professionals and fac