Chaos Ransomware Group Claims 1,500 GB Data Theft from Astrana Health
A ransomware group calling itself Chaos announced on October 9, 2026 that it had exfiltrated 1,500 gigabytes of data from Astrana Health, Inc., a California-based physician-management company whose network supports roughly 20,000 affiliated medical providers. The group claims the theft followed Astrana's decision not to negotiate with the attackers, and says the stolen trove includes patient diagnoses and personal information.