Los Madroños Hospital Listed by qilin Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

Healthcare organisations remain a frequent target for ransomware operators who combine system disruption with the theft of internal data. Against that backdrop, Los Madroños Hospital was listed on 7 March 2025 by the group known as qilin, which claims to have carried out a ransomware attack that included the exfiltration of internal files. The number of people affected has not been disclosed, and public detail remains limited to the group’s own statements.

The listing itself is an unverified claim. What is known is that qilin asserts it attempted to negotiate with hospital management over data protection, sent multiple emails seeking the attention of Jesús Tornero, and received no response before publishing the victim’s name. For patients, staff and partners, the episode underscores the continuing pressure on medical institutions and the practical need to understand what may have been exposed.

Breaking down the breach

According to the information made public on 7 March 2025, Los Madroños Hospital appears on qilin’s leak site as a victim of a ransomware attack in which internal files were exfiltrated. The group states that it tried to negotiate regarding data protection with the hospital’s management and that numerous emails containing details of the incident were sent in an effort to reach Jesús Tornero. The group further claims that no one from Los Madroños Hospital responded. Beyond these assertions, the precise timing of the intrusion, the technical method of entry, the volume of data taken, and the exact number of individuals affected remain undisclosed. No independent confirmation of the group’s claims has been published in the available record.

Ransomware incidents of this type typically involve encryption of systems combined with data theft for leverage. In this case the only concrete description supplied is that internal files were allegedly exfiltrated. Whether systems were encrypted, how long the attackers remained inside the network, or whether any ransom demand was met are all unconfirmed.

Who is qilin?

Qilin is a ransomware-as-a-service operation that has been active for several years and is known for double-extortion tactics: encrypting victim systems while simultaneously stealing data and threatening to publish it if payment is not made. The group maintains a dark-web leak site on which it lists organisations it claims to have compromised, often posting sample files or larger archives as proof. Public reporting has linked qilin to attacks across multiple sectors, including healthcare, manufacturing and professional services, frequently after initial access is obtained through phishing, compromised credentials or unpatched vulnerabilities. Affiliates of the group handle the intrusion and negotiation phases, while the core operators provide the ransomware payload and infrastructure. Claims posted on the leak site are assertions by the group itself and are not independently verified unless confirmed by the victim or by forensic investigators.

In the present case, qilin’s listing of Los Madroños Hospital follows the same pattern: a public claim of successful data exfiltration and an account of failed negotiation attempts. No additional technical indicators or sample data specific to this incident have been described in the available facts.

About Los Madroños Hospital

Los Madroños Hospital is a medical facility that provides clinical care to patients. Like other hospitals, it routinely processes and stores large volumes of sensitive information: medical histories, diagnostic results, treatment plans, insurance and billing records, staff personnel files, and operational documents. Such organisations sit at the intersection of patient trust and regulatory obligations, making any unauthorised access to their systems potentially consequential for both individuals and the institution’s ability to deliver care without interruption.

A ransomware incident at a hospital can affect clinical workflows, delay appointments or procedures, and raise questions about the confidentiality of personal health information. Even when the full scope of an attack is not yet public, the mere listing of a healthcare provider by a known ransomware group is therefore of legitimate public interest.

The information in question

The only data category named in connection with this incident is “internal files” said to have been exfiltrated during a ransomware attack. No further breakdown—such as whether the files included patient records, employee data, financial documents or technical configurations—has been disclosed. The number of people whose information may be involved is listed as unknown.

Hospitals of this type typically hold patient identifiers, clinical notes, laboratory results, imaging data, contact details, insurance information and staff records. Because the exact contents of the claimed exfiltration remain unconfirmed, it is not possible to state which of these categories, if any, were taken. Readers should treat any specific assertions about the nature of the data as unverified until corroborated by the hospital or by independent analysis.

What's at stake

For individuals, the principal risks associated with the exposure of hospital-held data include identity theft, medical fraud, targeted phishing that references genuine clinical details, and the long-term misuse of sensitive health information. Even when the precise files are unknown, the possibility that personal or medical data left the organisation’s control creates a need for heightened vigilance.

For the hospital itself, the consequences can include operational disruption, regulatory scrutiny, reputational damage and the cost of forensic investigation, system restoration and patient notification. The group’s claim that negotiation attempts went unanswered may also influence how the incident is perceived by regulators and the public. None of these outcomes can be quantified from the limited public record, but each is a recognised feature of ransomware events in the healthcare sector.

Were you affected?

If you have been a patient, employee or contractor of Los Madroños Hospital, treat the situation as a potential exposure until more information becomes available. Monitor bank and credit-card statements for unfamiliar activity, be alert to phishing messages that appear to come from the hospital or that reference medical appointments, and consider placing a fraud alert with credit-reporting agencies if you reside in a jurisdiction that offers that service. Request a copy of your medical records if you wish to check for unexplained entries. You can also run a free exposure scan of your email address to see whether it has already appeared in known breach data sets. Official updates from the hospital, when issued, should be regarded as the primary source of confirmed guidance.

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