high severity October 31, 2023 · 4 min read Unverified claim — what this is

MEDIMARKET Listed by Cactus Ransomware Group

If you are a customer of Medimarket, here’s what is being claimed, and what it would mean for you.

Medimarket was listed on Cactus's leak site. Cactus claims to have stolen internal data. This is the group's claim, not a confirmed finding.

MEDIMARKET Listed by Cactus Ransomware Group

On October 31, 2023, Belgian pharmacy chain MEDI-MARKET appeared on the leak site operated by the Cactus ransomware group. The listing states that internal files were exfiltrated during a ransomware attack on the company, which operates a chain of large-format health-focused stores across Belgium. The disclosure does not specify the number of people affected or list particular categories of customer or employee data.

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Details in the Leak-Site Listing

The primary source, hosted on the Cactus leak portal and indexed by ransomware.live, states that MEDI-MARKET was listed after failing to meet the group’s demands. It describes the incident as a successful ransomware deployment that resulted in the theft of internal files. No sample data is shown on the public page, and the exact volume or sensitivity of the stolen material remains undisclosed by both the threat actor and the victim. The company’s public profile included in the listing notes its Brussels headquarters, €164 million in revenue, and focus on health, natural medicine, cosmetics, nutrition, and baby-care products.

October 31, 2023 marks the first public confirmation of the breach via the extortion portal. The notification does not quantify affected records, nor does it detail whether pharmacy customer prescriptions, loyalty-program information, or staff payroll files were among the stolen material.

Why This Matters for You and Your Family

When a pharmacy chain suffers a ransomware attack, the information at risk often includes details that directly affect personal health privacy and financial security. If you or your family have filled prescriptions, joined a loyalty scheme, or bought regulated products at MEDI-MARKET, your contact information, purchase history, or health-related notes may now sit in an attacker’s archive. Even without an exact victim count, the exposure creates long-term risk because health data retains value to identity thieves, insurance fraudsters, and blackmailers far longer than a simple email address.

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Report details & sourcing

Attributed to Cactus · 247 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed October 31, 2023

Last reviewed August 8, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

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Cactus — 247 incidents tracked

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