Cyber Threat Intelligence
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Ransomware Victim Telecommunication

Comcast

Ransomware attack by Spacebears · Disclosed December 8, 2025 · 🇺🇸 United States

corporate.comcast.com

Date Disclosed
Dec 8, 2025
2025
Threat Group
Spacebears
160 total victims
Country
🇺🇸 United States
Industry
Telecommunication

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for Spacebears. Figures and technique mappings are quoted from the source data, not inferred.

About the Spacebears group

Space Bears is a double-extortion ransomware group that emerged in April 2024, distinguished by a professional "corporate" aesthetic on its leak site, leveraging Phobos RaaS infrastructure and targeting small-to-medium organizations in manufacturing, technology, and healthcare across the US and Europe. Spacebears has listed 147 victims since April 2024.

Incident Analysis

Comcast was targeted by Spacebears ransomware, one of the most active ransomware groups in our database with 160 confirmed victims globally. The attack was disclosed on December 8, 2025, when Comcast appeared on the group's dark web leak site.

Comcast is based in United States , operating in the Telecommunication sector. United States ranks #1 globally for ransomware attacks, with 9,433 victims in our database.

Sector context: Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

Spacebears typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats — paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Sep 7, 2026 18:00 UTC.

Frequently Asked Questions

Was Comcast attacked by ransomware?

Yes. Comcast was listed as a victim of the Spacebears ransomware group on December 8, 2025. The organisation is based in United States and operates in the Telecommunication sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Comcast?

Comcast was attacked by Spacebears ransomware. Spacebears is one of the most active ransomware groups, having claimed 160 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Comcast ransomware attack occur?

The ransomware attack on Comcast was disclosed on December 8, 2025. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the Comcast ransomware attack?

The specific data stolen from Comcast has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Telecommunication organisation, Comcast likely held sensitive business data, client information, and operational records.

How can organisations protect against Spacebears attacks?

To defend against Spacebears and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.