Mayfair Hotels & Resorts listed on sinobi ransomware leak site

• Ransomware group: sinobi
• Country: India
• Sector: Hospitality
• Announcement date: February 19, 2026

Mayfair Hotels & Resorts has been listed on a leak site by the ransomware group known as sinobi. The threat actor claims to have targeted the organization and is currently demanding a ransom of 5,000,000 USD.

The details of the claim

The threat actor known as sinobi listed Mayfair Hotels & Resorts on its leak site on February 19, 2026. According to the announcement made by the group, the attack occurred on the same day, February 19, 2026. The group alleges that it has successfully encrypted the organization's data and asserts that it possesses proof of the breach to support these claims.

In the announcement, the group has stated a specific ransom demand of 5,000,000 USD. This type of extortion is characteristic of modern ransomware operations, where attackers often employ a double extortion tactic. In such scenarios, threat actors do not only encrypt an organization's systems to disrupt operations but also threaten to leak sensitive information on public leak sites to pressure the victim into paying the ransom.

Information regarding the compromised data

The screenshots provided in the announcement display what are claimed to be file directories and system screens belonging to the organization. However, the specific nature of the compromised data has not been disclosed by the group. The listing does not name any specific data types or provide details regarding the volume of the files involved.

While the visual evidence provided by the group suggests access to internal systems, the lack of specific information regarding the content of the files makes it difficult to determine the exact scope of the data exposure at this time. In many ransomware incidents, attackers provide limited initial evidence to prove the validity of their breach before proceeding with further extortion demands.

Impact and assessment

This incident may pose a risk to the operational continuity and customer trust of Mayfair Hotels & Resorts. Given that the organization operates in the hospitality sector, the potential compromise of guest personal data could lead to legal consequences under Indian data protection regulations. The stated ransom demand may indicate that the group has a financially motivated objective.

Furthermore, such leaks could create a foundation for identity theft or targeted phishing attacks against the organization's customers. Information regarding the sinobi group remains limited, as there is little publicly available data concerning their specific tactics, techniques, or procedures.

For organizations operating in the hospitality sector, maintaining robust cybersecurity postures is essential to mitigate these risks. General defensive steps often include implementing multi-factor authentication, maintaining regular offline backups, and conducting regular security awareness training for staff to prevent initial access through phishing. Protecting guest data is not only a matter of operational security but also a critical component of regulatory compliance and maintaining long-term consumer confidence.