Artemis Healthcare, Inc Listed by crypto24 Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

Ransomware groups continue to single out healthcare providers because patient records hold lasting value for fraud and identity misuse, and because clinical operations cannot easily tolerate downtime. Against that backdrop, Artemis Healthcare, Inc. was listed on 31 May 2025 by the crypto24 ransomware group. Public reporting states that the group claims to have exfiltrated internal files containing sensitive personal data. The number of people affected remains unknown, yet any confirmed exposure of medical information carries lasting consequences for patients and for the organisation itself.

Because the listing is an unverified claim posted by the attackers, independent confirmation of the full scope has not been made public. What follows summarises only the facts that have been reported and places them in context for anyone who may be concerned.

Breaking down the breach

On 31 May 2025 Artemis Healthcare, Inc. appeared on the leak site operated by the crypto24 ransomware group. The sole public description states that internal files were exfiltrated in a ransomware attack and that those files contain sensitive personal data, including medical records, official documents, and imaging files of millions of patients, as well as various databases. No further technical details—such as the initial access vector, the precise date of intrusion, the volume of data taken, or whether systems were encrypted—have been disclosed. The number of individuals affected is listed as unknown. All statements about the contents of the files originate from the group’s own claim and have not been independently verified in the available record.

Who is crypto24?

Crypto24 is a ransomware operation that follows the now-common double-extortion model: data are stolen before systems are encrypted, and the threat of public release is used to pressure victims into paying. Groups of this type typically advertise victims on dedicated leak sites, post sample files, and set deadlines for payment. Public reporting on crypto24 has documented its use of standard ransomware toolkits, affiliate-style recruitment, and opportunistic targeting of organisations that hold large volumes of personal or regulated data. In this instance the group claims to have listed Artemis Healthcare, Inc.; that claim should be treated as an unverified assertion until corroborated by the organisation or by independent investigators.

Who is Artemis Healthcare, Inc?

Artemis Healthcare, Inc. operates in the healthcare sector. Organisations of this kind routinely collect and store patient demographics, clinical histories, diagnostic images, insurance details and administrative records in order to deliver care and manage billing. Because those records are both sensitive and long-lived, a breach involving a healthcare provider raises particular concern: medical data cannot be changed the way a credit-card number can, and the information can be reused for years in identity-theft or insurance-fraud schemes. The public record does not describe Artemis Healthcare’s size, locations or specific services beyond its name and sector, so any assessment of impact must remain general.

What data was at risk

The only description of exposed material comes from the crypto24 listing itself, which asserts that internal files containing sensitive personal data—medical records, official documents, imaging files of millions of patients, and various databases—were exfiltrated. No independent inventory of the files has been published, and the exact data types, file counts or patient numbers remain unconfirmed. Healthcare organisations typically hold names, dates of birth, addresses, Social Security or national-identity numbers, clinical notes, laboratory results, radiology images and insurance identifiers. Whether any or all of those elements were present in the files claimed by crypto24 is not established by the available facts.

The real-world impact

If the group’s claim is accurate, affected individuals face elevated risks of medical identity theft, fraudulent insurance claims, and targeted phishing that references genuine clinical details. Such misuse can delay legitimate care, create inaccurate medical histories, and generate financial losses that take months to resolve. For the organisation the consequences include potential regulatory scrutiny under health-privacy rules, notification costs, possible class-action exposure, and erosion of patient trust. Because the number of people affected is unknown and the precise contents of the files are unconfirmed, the scale of these risks cannot yet be quantified; the prudent course is to treat the incident as a credible threat until more information appears.

If your data was in this claimed breach

Anyone who has been a patient or employee of Artemis Healthcare, Inc. should monitor account statements, credit reports and Explanation-of-Benefits notices for unfamiliar activity. Consider placing a fraud alert or credit freeze with the major credit bureaus, and be cautious of unsolicited calls or emails that reference medical details. If you receive formal notification from the organisation, follow the instructions it provides for free credit monitoring or identity-protection services. As an additional step, readers can run a free exposure scan of their email address to check whether that address has already appeared in known breach data sets; doing so supplies an early signal that further vigilance may be warranted.

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