high severity December 26, 2025 · 4 min read Unverified claim — what this is

bwk-berlin.de Listed by lockbit5 Ransomware Group

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

BWK BildungsWerk in Kreuzberg GmbH - Bildungseinrichtung in Berlin
— from LockBit’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.

bwk-berlin.de Listed by lockbit5 Ransomware Group

On December 26, 2025, the Berlin-based educational organization BWK BildungsWerk in Kreuzberg GmbH appeared on the LockBit 5 ransomware leak site. Internal files were allegedly exfiltrated during a ransomware attack, and the group published a sample of the stolen data as proof. Anyone whose personal information was stored in the organization’s systems could be affected, including students, parents, staff members, and their families.

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What Public Reporting Shows

Public reporting indicates that BWK BildungsWerk in Kreuzberg GmbH, an educational provider in Berlin, had internal files taken in a ransomware incident. The data was listed on the LockBit 5 leak site on December 26, 2025. Exact victim numbers remain unknown, and the precise volume and types of records exposed have not been fully detailed in available reporting. The organization focuses on education and training programs, which means student records, employee information, and administrative documents were likely among the files at risk.

LockBit 5 followed its usual pattern of posting proof of compromise and threatening full data release if demands are not met.

Why This Matters for You and Your Family

When an educational institution suffers a breach, the information exposed often includes names, addresses, dates of birth, contact details, and sometimes financial or health-related records of children and adults alike. If your family has used BWK BildungsWerk’s services, attended courses, or had a household member employed there, your data could now sit in a ransomware group’s hands. Once stolen, this information rarely stays contained. It can be sold, traded, or used to launch further attacks against you personally.

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Found on people-search siteswe remove these

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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

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 LockBit · 3412 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed December 26, 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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LockBit — 3412 incidents tracked

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

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