high severity May 10, 2026 · 4 min read Unverified claim — what this is

ossistemes.com Listed by Lynx Ransomware Group

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

OS Sistemes is a tech company that helps businesses bring their digital projects to life. They work closely with clients to design, build, and deliver custom technology solutions. Whether it's software development, network setup, or bringing new tech ideas to reality, their team knows how to tackle projects that other tech companies might find tricky. They're all about finding smart ways to solve technical challenges and keep businesses running smoothly.
— from Lynx’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.

ossistemes.com Listed by Lynx Ransomware Group

On May 10, 2026, the ransomware group Lynx added ossistemes.com to its leak site and began publishing what it claims are internal files exfiltrated from the Spanish technology services company OS Sistemes.

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What Public Reporting Shows

Public reporting indicates that OS Sistemes, which provides software development, network infrastructure, and custom technology solutions to business clients, suffered a ransomware intrusion. The attackers exfiltrated internal files before encrypting systems. As of the publication date, the precise number of individuals whose personal data appears in the files remains unknown. Available reporting describes the exposed material as internal documents rather than a structured database of customer records, though such files frequently contain contracts, employee details, client contact information, and project documentation that can include names, email addresses, phone numbers, and other personally identifiable information.

The listing appeared on the Lynx leak site hosted on the dark web, with the primary record tracked at the ransomware.live aggregator. No ransom demand deadline has been publicly confirmed in secondary coverage, but ransomware groups routinely set short windows before full data publication or auction.

Why This Matters for You and Your Family

When a company like OS Sistemes is breached, the information stolen can reach far beyond corporate walls. If you or any member of your family has worked with the firm, used one of its client portals, or had your details stored in a project file, those records may now sit on a criminal leak site. Internal files often hold more than names and emails; they can contain addresses, project notes referencing family members, or even login credentials for systems used to manage client relationships.

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What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Report details & sourcing

Attributed to Lynx · 415 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed May 10, 2026

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.

Threat-actor tracker

Lynx — 415 incidents tracked

Every breach we've attributed to Lynx, in one running log. See who else they've hit →

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