Sanatorio Delta Listed by thegentlemen Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On May 24, 2026, the Sanatorio Delta healthcare provider in Rosario, Argentina, appeared on a listing associated with the thegentlemen ransomware group. The entry stated that internal files had been taken during a ransomware operation. No confirmed count of affected individuals has been released, and the organization has not issued a public statement on the scope of any data exposure. The incident remains limited in verified detail. The listing indicates that files were removed from the network, yet the volume of data, the specific systems accessed, and the timeline of the intrusion are not disclosed. It is also unconfirmed whether the files were later published or used in any further activity beyond the initial claim.

Inside the incident

The only confirmed information is the May 24, 2026 listing and the reference to exfiltrated internal files. No ransom demand amount, encryption details, or evidence of patient record access has been made public. The exact method of entry into the network is not reported.

Inside thegentlemen

The thegentlemen group is a ransomware operator that has appeared in multiple public listings since 2023. Its documented pattern involves gaining access to corporate networks, copying data, and then posting victim names on a leak site when negotiations fail or to apply pressure. The group has previously targeted organizations in Latin America and the healthcare sector, though each listing must be evaluated individually because claims on such sites are not independently verified at the time of posting.

About Sanatorio Delta

Sanatorio Delta operates as a private healthcare institution serving Rosario and surrounding areas. Facilities of this type routinely maintain electronic health records, appointment systems, billing information, and internal administrative documents. A breach at any such provider is consequential because the data supports ongoing medical care and contains details that individuals cannot easily change, such as clinical histories and identification numbers.

What data was at risk

The listing refers only to internal files. The precise categories of information contained in those files have not been confirmed. Healthcare providers in Argentina commonly store patient identifiers, medical notes, laboratory results, insurance data, and staff records; however, whether any of these specific categories were among the exfiltrated material remains unknown.

Why it matters

Exposed internal files from a medical facility can contain information used for identity verification or for targeting individuals with tailored scams. For the organization, the incident adds operational disruption and potential regulatory obligations under Argentine data-protection rules. Both the individuals and the institution face costs related to investigation, notification, and any required remediation.

If your data was in this claimed breach

Individuals connected to Sanatorio Delta should treat any contact referencing the incident with caution and verify communications directly through official channels.

• Review statements or notifications issued by the organization for guidance on next steps.
• Monitor bank and insurance accounts for unusual activity.
• Request a copy of your medical records from the provider to check for accuracy.
• Use a free exposure scan of your email address against known breach data to see whether your information appears in other incidents.

AICompiled with AI assistance from public sources and published under our editorial standards.