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high severity July 27, 2025 · 3 min read Unverified claim — what this is

College stjb Listed by arcusmedia Ransomware Group

If you are a student of College stjb, here’s what is being claimed, and what it would mean for you.

Days06Hours23Minutes22226666Seconds22229999 stjb-delasalle.frThe Collège Saint Jean-Baptiste de La Salle is a Catholic establishment b…

— from Arcusmedia’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.
College stjb Listed by arcusmedia Ransomware Group

On July 27, 2025, the ransomware group ArcusMedia added the French Catholic school Collège Saint Jean-Baptiste de La Salle to its public leak site, claiming that internal files had been exfiltrated from the institution’s systems.

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Reported Details of the Incident

Public reporting indicates the school’s domain stjb-delasalle.fr was listed on the ArcusMedia leak portal hosted on the dark web. The group claims to have stolen internal files during a ransomware attack, though the exact volume and specific types of records remain undisclosed in available reporting. No confirmed victim count has been published, and the school has not issued a public statement detailing the breach as of the listing date. The incident follows the group’s typical pattern of publishing victim names after an initial period of private negotiation.

Why This Matters for You and Your Family

Even when a breach occurs at a school, the consequences reach far beyond the institution. Internal files often contain names, addresses, dates of birth, parent contact details, medical notes, and sometimes financial records for families. If your child attends a school that experiences this type of attack, your household data can appear in underground markets within weeks. Once exposed, the information fuels identity theft, phishing campaigns, and harassment that can continue for years. Ordinary families rarely discover the leak until fraudulent accounts or unexpected calls begin.

The Doxxing and Identity-Chain Risks

Ransomware leaks rarely stop at one dataset. A single exposed email or phone number from a school file can be combined with gaming usernames, social-media handles, and family addresses to build a complete identity chain. Attackers then target children’s gaming accounts, using credential-stuffing attacks that succeed because the same password was reused across school portals, email, and online games. This cascade turns a school breach into household doxxing, where personal photos, addresses, and schedules become public. Credential leaks like this one frequently lead to account takeovers that expose even more sensitive data.

ArcusMedia’s Publicly Known Track Record

Public reporting attributes the group’s emergence to early 2024. It has since listed schools, healthcare providers, and small-to-medium businesses across Europe and North America. Notable prior victims include other educational institutions and local government entities, though exact details vary by leak site. The group’s typical playbook involves initial access through phishing or unpatched remote desktop services, followed by data exfiltration before encryption. They then demand ransom and, if unpaid, publish samples on their leak site with countdown timers. Available reporting describes their extortion style as aggressive publication rather than prolonged negotiation once the deadline passes.

What to do

  • Run a DoxxScan to map every link between your family’s emails, phone numbers, gaming handles, and real-world identities so you can break the chains attackers rely on.
  • Rotate any password used at stjb-delasalle.fr or related school services wherever it has been reused, and switch to 2FA through an authenticator app instead of SMS.
  • Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next leak exposing your household is caught and addressed in hours rather than months.
  • Cover the entire household with DoxxScan family protection, which includes children’s gaming accounts that often chain back to the same leaked school records.
  • Let remediation specialists handle takedown requests across data brokers and leak sites while you focus on securing your own accounts.

The speed with which school data reaches criminal marketplaces shows that waiting for official notices is no longer enough. Start your DoxxScan trial today and gain both continuous monitoring across 13.1B+ breach records and 100+ platforms plus hands-on remediation by specialists who understand how credential leaks cascade into account takeovers and doxxing chains. DoxxScan by GalaxyWarden is built for exactly these household risks, giving ordinary families the same early-warning and cleanup capabilities once reserved for large organizations.

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 sample582 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.

Check your exposure
College stjb is one listing. Your email is probably in others.
We can’t confirm any single incident against the sources we search, so we won’t pretend to. What we can show you is your own exposure — your email against 13.1B+ leaked records and the sites that publish your address. About 15 seconds. No account, no card.

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Report details & sourcing

Severity High the filing does not enumerate what was exposed
Disclosed July 27, 2025
Last reviewed August 8, 2026
Affected Unconfirmed
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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