high severity March 30, 2026 · 3 min read Unverified claim — what this is

cti-bat.fr Listed by lockbit5 Ransomware Group

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

cti-bat.fr was listed on LockBit's leak site. LockBit claims to have stolen internal data. This is the group's claim, not a confirmed finding.

cti-bat.fr Listed by lockbit5 Ransomware Group

On March 4, 2026, the French building company CTI BAT appeared on the LockBit 5 ransomware group's leak site with internal files listed for public download after the firm refused to pay an extortion demand.

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What Public Reporting Shows

Public reporting indicates that LockBit 5 operators gained access to CTI BAT's systems, exfiltrated internal documents, and later published a sample of the stolen data when the company did not meet their ransom deadline. The leak site entry includes a direct link to the stolen archive hosted on the group's onion domain. No exact victim count has been disclosed, and the precise volume of data remains unclear from available screenshots and descriptions. The exposed materials consist of internal files typical of a construction and renovation business, including project records, supplier lists, and administrative documents. Ransomware.live, which tracks such incidents, mirrored the listing shortly after it appeared.

Why This Matters for You and Your Family

When a company that has handled work on homes, offices, or public buildings is breached, the information inside its files can easily include addresses, contact details, contract values, and sometimes even family names tied to renovation projects. If those records contain your information, it can surface in unexpected places. Credential leaks from related employee accounts often follow, giving attackers the raw material they need to attempt logins on personal email, banking, or shopping sites where the same password was reused. For families this means a single business breach can quietly feed longer-term risks that touch your home address, children's names, or shared accounts.

The Doxxing and Identity-Chain Implications

Stolen internal files frequently contain spreadsheets or PDFs that link company emails, phone numbers, physical addresses, and employee or client identities. Attackers chain these fragments together with data from earlier breaches to build detailed profiles. A phone number found in one document can be matched to a gaming username, which then links to a child's account. Once the chain exists, doxxing escalates quickly: harassment, targeted phishing, or resale of the full identity package on underground forums. Credential leaks like this one regularly cascade into account takeovers precisely because the same passwords and recovery details appear across work and personal services.

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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 LockBit · 3412 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed March 30, 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.

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LockBit — 3412 incidents tracked

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