Kettering Health Hit by System-Wide Outage After Ransomware Attack
Kettering Health, a healthcare network in Ohio, experienced a ransomware attack on May 20, 2025, causing a system-wide technology outage. The attack, attributed to the Interlock ransomware group, forced the cancellation of inpatient and outpatient procedures and disrupted phone lines and patient portals. While emergency rooms remained open, staff reverted to manual, pen-and-paper workflows. The Interlock group claimed to have exfiltrated 941 GB of data, including patient information, and leaked it when the ransom was not paid.
Ketteringhealth
- Domain
- ketteringhealth.org
- Sector
- Health Care and Social Assistance
- Signals
- 1 linked
Signal context
First seen: May 20, 2025
Last updated: Jun 26, 2026
Status: Public signal
Key points
- Ransomware attack on May 20, 2025, caused a system-wide outage at Kettering Health.
- Interlock ransomware group claimed responsibility, exfiltrating 941 GB of data.
- Disrupted operations, including canceled procedures, phone lines, and patient portals.
Signal analysis
BetaThis analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Sector: Health Care and Social Assistance
Likely country: Location not provided
The feed marks multiple actor roles. Treat this as a review signal rather than a final attribution.
- Source type: outside the affected organization
- Source type: possible insider or internal misuse
Impact area: Confidentiality, Availability
Likely asset: User or customer data
- 6 signals in the same sector
- 100 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Kettering Health Cyberattack: Cyber Resilience Lessons for Every Business - DataYardhttps://www.datayard.com/blog/kettering-health-cyberattack-cyber-resilience-lessons-for-every-business/Public source from datayard.com.
Kettering Health hit by system-wide outage after ransomware attack - Bleeping Computerhttps://www.bleepingcomputer.com/news/security/kettering-health-hit-by-system-wide-outage-after-ransomware-attack/Public source from bleepingcomputer.com.
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