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Cyber Threat
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Ransomware victim Healthcare

West County Health Centers

Listed by Storm on · organisation based in United States

Disclosed
Sep 30, 2026
Leak-site listing date
Threat group
Storm
113 victims listed
Country
United States
#1 most targeted
Sector
Healthcare

ThreatAI analysis

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

About West County Health Centers

West County Health Centers provides comprehensive, quality and accessible health care services to the communities of western Sonoma County.The company is a cohesive team of health care providers, support staff and volunteers dedicated to wellness, compassion, affordability and excellence of care. The company believes in non-judgmental and equal care for all members of the company's diverse community. The company headquarters is located in 14045 Mill Street, Guerneville, CA 95446, United States. 51-200 Employees

Source record: ransomware.live

About the Storm group

Storm has listed 84 victims since August 2026.

Incident analysis

West County Health Centers was listed by Storm ransomware, a group with 113 victims recorded in this database. The listing appeared on the group's leak site on September 30, 2026.

West County Health Centers is based in United States and operates in the Healthcare sector. United States ranks #1 worldwide for ransomware disclosures, with 10,008 victims in this 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.

Storm typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was West County Health Centers attacked by ransomware?

Yes. West County Health Centers was listed as a victim of the Storm ransomware group on September 30, 2026. 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 West County Health Centers?

West County Health Centers was attacked by Storm ransomware. Storm is one of the most active ransomware groups, having claimed 113 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the West County Health Centers ransomware attack occur?

The ransomware attack on West County Health Centers was disclosed on September 30, 2026. 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 West County Health Centers ransomware attack?

The specific data stolen from West County Health Centers 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, West County Health Centers likely held patient records, medical data, and personally identifiable information (PII).

How can organisations protect against Storm attacks?

To defend against Storm 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.