Mayfair Hotels & Resorts Listed by sinobi Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Mayfair Hotels & Resorts was listed by the sinobi ransomware group on February 19, 2026, after internal files were exfiltrated in a ransomware attack. The number of individuals affected is not yet known; anyone who has stayed at or done business with the group should monitor their accounts and consider placing fraud alerts.
Breaking down the breach
The incident was reported on February 19, 2026, when the organisation appeared on a listing maintained by the sinobi group. The only detail provided is that internal files were allegedly exfiltrated during a ransomware attack. No information has been released on the timing of the intrusion, the volume of data involved, or the method used to gain access. The number of people affected remains unknown.
The group behind it: sinobi
Sinobi is a ransomware operator that maintains a public leak site where it lists organisations it claims to have targeted. The group typically exfiltrates data during intrusions and uses the threat of publication to pressure victims. Its listings constitute claims made by the group; independent confirmation of any specific incident is not provided by the listing itself.
About Mayfair Hotels & Resorts
Mayfair Hotels & Resorts is a luxury hospitality chain founded in 1982 and headquartered in Bhubaneswar, Odisha. It operates more than 17 premium properties across India, including locations in Darjeeling, Gangtok, Goa, and Puri. Organisations in this sector routinely collect and store guest registration details, booking records, and operational documents to manage reservations and services.
The information in question
The listing states that internal files were exfiltrated. No further breakdown of file contents or data categories has been published. Hospitality companies commonly hold names, contact information, payment card details, and identification documents for guests, along with employee records and supplier information, but the precise composition of the exfiltrated material in this case is unconfirmed.
What's at stake
Exposed internal files can contain personal or financial information that may be used for fraud or identity misuse if it reaches third parties. For the organisation, the incident may lead to regulatory scrutiny, costs associated with investigation and remediation, and potential disruption to operations while systems are restored. The absence of Reported Details on scale or data types limits precise assessment of impact at this stage.
If your data was in this claimed breach
Monitor bank and credit card statements for unauthorised activity and consider placing fraud alerts with credit reporting agencies. Use strong, unique passwords and enable multi-factor authentication on accounts linked to the organisation. Readers can run a free exposure scan of their email address against known breach data to check for appearances in previously published records.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by sinobi — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.