high severity October 15, 2025 · 4 min read Unverified claim — what this is

LEYHAUSEN Research Listed by Qilin Ransomware Group

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

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

LEYHAUSEN Research Listed by Qilin Ransomware Group

On October 15, 2025, German market research firm Leyhausen Research GmbH appeared on the leak site of the qilin ransomware group after its internal files were allegedly exfiltrated during a ransomware attack.

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What Public Reporting Shows

Public reporting indicates that Leyhausen Research, founded in 1996 and headquartered in Leverkusen, Germany, provides global field services including state-of-the-art facilities and call centers spanning Europe, the Middle East, India, and Africa. The qilin ransomware group listed the company on its data leak portal, claiming to have stolen internal files. Available reporting describes the exposed material as internal documents, though the precise volume and full list of data types remain unconfirmed by the company. No specific victim count for individuals whose information may have been inside those files has been disclosed.

October 15, 2025 marks the public listing date on the qilin leak site. The attack followed the typical ransomware pattern of initial access, data exfiltration, and subsequent extortion pressure.

Why This Matters for You and Your Family

When a company that conducts surveys, manages call centers, or handles field research is breached, the files taken often contain contact details, survey responses, or customer records that can include names, addresses, phone numbers, email addresses, and other personal information belonging to ordinary people like you. If your family has ever participated in market research studies, focus groups, or responded to calls from European or international research firms, your data may have been stored in systems now compromised.

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value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

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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 Qilin · 2349 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed October 15, 2025

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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Qilin — 2349 incidents tracked

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

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