high severity December 07, 2025 · 3 min read Unverified claim — what this is

Comcast Listed by Space Bears Ransomware Group

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

As a global media and tech company, Comcast reaches hundreds of millions of customers, viewers, and guests with world-class connectivity and platforms and beloved content and experiences.The leak was made possible by Quasar Inc., a company that prepares technical documentation for Comсast and its Genesis project. The files contain design documentation for numerous cities, as well as detailed utility plans. https://corporate.comcast.com/
— from Space Bears’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.

Comcast Listed by Space Bears Ransomware Group

On December 7, 2025, the ransomware group known as spacebears added Comcast to its leak site and began publishing internal files exfiltrated from the company.

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Reported Details of the Incident

Public reporting indicates the breach originated with Quasar Inc., a vendor that creates technical documentation for Comcast’s Genesis project. The files include design documentation for multiple cities and detailed utility plans. Available reporting describes the exposed material as internal documents rather than customer account records. The exact number of people whose information may be affected remains unknown. The leak site is hosted on the dark web and is accessible only via Tor.

Comcast serves hundreds of millions of customers worldwide through its connectivity, media, and entertainment platforms. Any internal compromise at this scale raises immediate questions about what else may have been taken.

Why This Matters for You and Your Family

When a company the size of Comcast loses control of internal files, the ripple effects reach ordinary households. Utility plans and infrastructure documents can contain addresses, network layouts, and operational details that determined attackers use to target specific neighborhoods or individuals. If your home internet, cable, or mobile service comes from Comcast, your billing address, account numbers, or service location data may sit inside systems connected to the same environment that Quasar Inc. accessed.

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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 Space Bears · 157 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed December 07, 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

Space Bears — 157 incidents tracked

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

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