Hospital Sírio-Libanês listed on THE SEVEN DEADLY SINS ransomware leak site

• Ransomware group: THE SEVEN DEADLY SINS
• Country: Brazil
• Sector: Healthcare
• Announcement date: October 16, 2026

The Brazil-based healthcare provider Hospital Sírio-Libanês has been listed on the leak site of the ransomware group known as THE SEVEN DEADLY SINS. The announcement, posted on October 16, 2026, indicates a significant data breach involving the prestigious medical institution.

The alleged data exfiltration event

According to the claim made by THE SEVEN DEADLY SINS, the group has successfully exfiltrated a massive amount of data from the organization. The group alleges that they have obtained over 3.5 million rows of data. The announcement on the leak site included technical details regarding the institution's digital assets and provided sample files to support their claims.

Ransomware groups often utilize a tactic known as double extortion, where they not only encrypt an organization's systems to disrupt operations but also steal sensitive information. By threatening to release this stolen data on public leak sites, the attackers aim to pressure the victim into paying a ransom to prevent the exposure of confidential information. While the specific ransom demand for this incident has not been disclosed, the listing of the organization on a public leak site is a common step in these extortion campaigns.

The scope of the alleged data breach

The data claimed by the attackers is highly sensitive, involving various types of medical and administrative records. The information allegedly stolen includes a wide range of patient-related documentation and institutional data. Specifically, the group claims to have access to the following types of information:

• Appointment records
• Telehealth data
• PROADI program information
• DATASUS records
• FHIR patient data
• SOAP notes
• Personal health information (PHI)

The exposure of such diverse datasets, particularly those involving personal health information, presents a significant security concern for the affected institution and its patients.

About Hospital Sírio-Libanês

Hospital Sírio-Libanês is one of the most prestigious and largest private hospital groups in Brazil, located in São Paulo. The institution is recognized for providing high-tech medical services, conducting research, and engaging in various educational activities.

Analysis and potential impact

This alleged breach may pose a high risk due to the exposure of sensitive medical information. Under Brazil's LGPD regulations, the organization may face mandatory breach notification requirements and potential legal sanctions. The leaked data could lead to patients being targeted for identity theft or phishing attacks. Furthermore, negative impacts on the continuity of healthcare services and patient privacy may be observed.

In the healthcare sector, the protection of data is critical due to the sensitive nature of medical records. Organizations in this sector typically implement defensive measures such as robust encryption, multi-factor authentication, regular security audits, and continuous monitoring to protect against such threats. However, the presence of a leak site announcement indicates that the attackers have moved into the extortion phase of their operation. Public information regarding the THE SE Seven DEADLY SINS group remains limited, making it difficult to attribute the attack or understand the group's full operational patterns.