MEDIMARKET Listed by cactus Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On 31 October 2023, MEDIMARKET appeared on a listing associated with the cactus ransomware group. Public detail indicates that internal files were claimed to have been exfiltrated in a ransomware attack. The number of people affected remains unknown, and the precise contents of those files have not been independently confirmed.

For customers, staff, and partners of a Belgian pharmacy and parapharmacy chain, any exposure of internal material raises practical questions about what information may now sit outside the organisation’s control and what steps are worth taking while fuller details are still limited.

Inside the incident

According to the available record, MEDIMARKET was listed by the cactus ransomware group on 31 October 2023. The reported summary states that internal files were exfiltrated in a ransomware attack. No confirmed figure for the number of people affected has been published. Timing of the underlying intrusion, the technical method used, the volume of data involved, and any ransom demand or negotiation outcome are not disclosed in the public facts. The listing itself constitutes a claim by the group rather than an independently verified confirmation of every asserted detail.

What is known is therefore narrow: a named organisation in the Belgian health-retail sector was publicly associated with a cactus ransomware listing, and the description of the incident centres on exfiltration of internal files. Beyond that, public detail is limited.

Who is cactus?

Cactus is a ransomware operation that became publicly visible in 2023. Like many contemporary ransomware groups, it has been associated with double-extortion tactics: encrypting systems while also copying data and threatening to publish or sell it if demands are not met. Groups operating in this model commonly maintain leak sites or similar channels on which they name victims and, in some cases, release samples or larger archives of stolen material.

Public reporting on cactus has described the use of relatively careful intrusion and encryption practices compared with some noisier predecessors, though specific tooling and affiliate structures can evolve. For the purposes of this incident, the relevant point is that cactus listed MEDIMARKET and claimed exfiltration of internal files. No further statements attributed to the group about this particular victim—such as exact file counts, sample releases, or deadlines—are included in the facts provided here. Any such claims should be treated as assertions by the actor until corroborated.

About MEDIMARKET

MEDIMARKET (also referred to as MEDI-MARKET) is described as a chain of pharmacies and parapharmacies in Belgium. Public organisational information characterises it as offering large-format stores—cited as 1,000 m² dedicated to health—with personalised advice and a product range covering health care, natural medicine, cosmetics, nutrition, and baby care. A website (www.medi-market.be), a Brussels address on Boulevard Anspach, a phone number, and a revenue figure of approximately $164 million appear in the same summary material.

Organisations in this sector typically sit at the intersection of retail, regulated health products, and customer service. They may hold supplier and inventory records, staff information, loyalty or customer contact details, and operational documents. A ransomware incident affecting such a business is consequential because health-adjacent retail often involves trust around personal and sometimes sensitive purchasing patterns, as well as continuity of service for people who rely on pharmacy access.

What data was at risk

The facts name the exposed material only as “internal files exfiltrated in a ransomware attack.” No inventory of specific data categories—such as customer names, contact details, purchase histories, employee records, financial documents, or medical-adjacent information—has been disclosed in the record used for this article. The number of individuals potentially implicated is listed as unknown.

Pharmacies and parapharmacies commonly process or store customer contact and loyalty data, transaction records, supplier contracts, internal HR files, and operational documents. Some may also handle information linked to prescriptions or health-related purchases, depending on local practice and systems. None of those categories should be assumed to have been confirmed as part of this incident. Exact contents remain unconfirmed; only the broad claim of internal-file exfiltration is stated.

What's at stake

For individuals, the main practical risks when internal files from a retail health business leave an organisation’s control include unwanted contact or phishing that appears more credible because it references a real local pharmacy chain, misuse of any contact or identity details that may have been present, and longer-term uncertainty if the full scope of the material is never published or independently audited. Without a confirmed data inventory, people cannot know with certainty whether their own information was included.

For the organisation, stakes include operational disruption typical of ransomware, potential regulatory and contractual obligations around personal data under European rules, reputational harm among customers who depend on pharmacy services, and the cost of investigation, containment, and recovery. Because the people-affected count is unknown and the file contents are not detailed publicly, both the human and institutional impact remain only partly visible from open sources.

What to do if you're exposed

If you have been a customer, employee, or partner of MEDIMARKET, treat the situation as a prompt for ordinary hygiene rather than panic. Watch for unexpected messages that reference the company or ask for credentials, payments, or personal details; verify any such contact through official channels you already trust. Consider updating passwords on accounts that reused credentials connected to pharmacy or retail logins, and enable multi-factor authentication where available. If you receive evidence that specific personal data of yours was involved, document it and follow guidance from relevant Belgian or European data-protection authorities as appropriate.

You can also run a free exposure scan of your email address to check whether it has already appeared in known breach datasets. That will not prove or disprove involvement in this specific incident, but it can show whether your address is circulating more widely and help you prioritise further precautions.

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