Rhysida Ransomware Hits Tennessee Hospital, Leaks 500GB Data
Cookeville Regional Medical Center, a Tennessee-based hospital, fell victim to a significant data breach last year, as reported by SecurityWeek. The notorious Rhysida ransomware group claimed responsibility for the attack, which resulted in the exfiltration of a staggering 500GB of sensitive data. This incident highlights the persistent and aggressive targeting of critical healthcare infrastructure by ransomware operators.
SecurityWeek further detailed that the breach ultimately impacted 337,000 individuals. This kind of widespread exposure is a harsh reminder of the downstream effects of these attacks, moving beyond just operational disruption to direct patient data compromise. The healthcare sector remains a prime target, largely due to the critical nature of its services and the invaluable, often irreplaceable, patient information it holds.
What This Means For You
- If your organization is in the healthcare sector, this isn't just another headline; it's a direct warning. Rhysida is relentless. You need to review your data exfiltration monitoring, endpoint detection and response (EDR) capabilities, and incident response plans *now*. Assume breach and validate your backups, especially off-network ones.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 auto-generated detection rules for this incident, mapped to MITRE ATT&CK. Available in Sigma, Splunk SPL, Sentinel KQL, Elastic Lucene, QRadar AQL, and Wazuh.
Monitor Authentication from Breached Vendor — Cookeville Regional Medical Center
Want this in your SIEM's native format? Get Splunk SPL, Sentinel KQL, Elastic, QRadar AQL, or Wazuh — ready to paste.
2 Sigma rules mapped to the ATT&CK techniques from this breach — pick your SIEM and get a ready-to-paste query.
Get All SIEM Formats →Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| Rhysida-Ransomware-2023 | Information Disclosure | Data exfiltration of 500GB by Rhysida ransomware group |
| Rhysida-Ransomware-2023 | Ransomware | Rhysida ransomware group activity |
| Rhysida-Ransomware-2023 | Targeted Attack | Cookeville Regional Medical Center |
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