high severity February 08, 2025 · 3 min read Unverified claim — what this is

Substitute Teacher Service Listed by Cicada3301 Ransomware Group

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

Substitute Teacher Service was listed on Cicada3301's leak site. Cicada3301 claims to have stolen internal data. This is the group's claim, not a confirmed finding.

Substitute Teacher Service Listed by Cicada3301 Ransomware Group

On February 8, 2025, the ransomware group Cicada3301 listed a substitute teacher service on its leak site, claiming to have exfiltrated 210 GB of internal files. The posting, which at the time of writing had been live for six days, threatens to publish the data unless the victim pays an undisclosed ransom.

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What Public Reporting Shows

Public reporting indicates the victim is a service that connects schools with substitute teachers. The Cicada3301 leak page shows a countdown timer and lists the stolen archive as 210 GB in size. No exact number of affected individuals has been confirmed, but the nature of the business means records for teachers, school staff, and potentially students could be included. Available reporting describes the exposed material as internal files; the precise data types have not been independently verified beyond the group’s claims.

Why This Matters for You and Your Family

When a substitute teacher platform is breached, the information at risk often includes names, addresses, phone numbers, email accounts, dates of birth, and employment details for educators and support staff. If your family includes anyone who works as a substitute, registers with such agencies, or has children in schools that use them, your personal data may now sit in a ransomware actor’s archive. Credential leaks from these incidents frequently cascade into gaming accounts, email takeovers, and further identity theft that can affect every member of the household.

The Doxxing and Identity-Chain Implications

Ransomware groups rarely stop at one database. Once internal files leave the victim’s network they can be sold, traded, or used to map relationships between email addresses, phone numbers, usernames, and physical addresses. A single exposed substitute-teacher record can link a parent’s work email to a child’s school login, a family gaming handle, or an old streaming account. These identity chains allow attackers to build convincing profiles for phishing, SIM-swapping, or targeted harassment. Public reporting on similar incidents shows that doxxing often follows initial data leaks within weeks.

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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 Cicada3301 · 75 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed February 08, 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.

Threat-actor tracker

Cicada3301 — 75 incidents tracked

Every breach we've attributed to Cicada3301, in one running log. See who else they've hit →

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