Cyber Threat Intelligence
CO
Ransomware Victim Healthcare

Colorado Health Network Inc

Ransomware attack by Cephalus · Disclosed August 28, 2025 · 🇺🇸 United States

coloradohealthnetwork.org

Date Disclosed
Aug 28, 2025
2025
Threat Group
Cephalus
19 total victims
Country
🇺🇸 United States
Industry
Healthcare

Incident Analysis

Colorado Health Network Inc was targeted by Cephalus ransomware, one of the most active ransomware groups in our database with 19 confirmed victims globally. The attack was disclosed on August 28, 2025, when Colorado Health Network Inc appeared on the group's dark web leak site.

Colorado Health Network Inc is based in United States , operating in the Healthcare sector. United States ranks #1 globally for ransomware attacks, with 8,273 victims in our database.

Sector context: Healthcare organisations are high-value ransomware targets because patient data is extremely sensitive, regulatory penalties for breaches are severe, and operational downtime can threaten patient safety — all factors that increase ransom payment pressure.

Cephalus 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: May 14, 2026 18:01 UTC.

Frequently Asked Questions

Was Colorado Health Network Inc attacked by ransomware?

Yes. Colorado Health Network Inc was listed as a victim of the Cephalus ransomware group on August 28, 2025. The organisation is based in United States and operates in the Healthcare sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Colorado Health Network Inc?

Colorado Health Network Inc was attacked by Cephalus ransomware. Cephalus is one of the most active ransomware groups, having claimed 19 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Colorado Health Network Inc ransomware attack occur?

The ransomware attack on Colorado Health Network Inc was disclosed on August 28, 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 Colorado Health Network Inc ransomware attack?

The specific data stolen from Colorado Health Network Inc 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 Healthcare organisation, Colorado Health Network Inc likely held patient records, medical data, and personally identifiable information (PII).

How can organisations protect against Cephalus attacks?

To defend against Cephalus 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.