Kettering Health hit by Interlock ransomware, data leaked
Kettering Health, an Ohio-based healthcare network, confirmed a ransomware attack by the Interlock group that disrupted internal systems, phone lines, and electronic health records across its 14 hospitals.
Key points
- Ransomware attack by Interlock group.
- Disrupted internal systems, phone lines, and electronic health records.
- Affected 14 hospitals, leading to procedure cancellations and ambulance diversions.
Connected intelligence
Signal brief
Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.
- Published
- Jun 6, 2025
- Updated
- Jun 26, 2026
- Confidence
- Medium
- Evidence
- 1 source
Structured assessment
Signal analysis
This 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.
Threat source
Watch ransomware, endpoint compromise and business interruption exposure.
- Source type: possible insider or internal misuse
Business impact
- Impact area
- Confidentiality, Availability
- Likely asset
- User or customer data
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
Kettering Health, an Ohio-based healthcare network, confirmed a ransomware attack by the Interlock group that disrupted internal systems, phone lines, and electronic health records across its 14 hospitals. The attack, which began in late May, led to procedure cancellations and ambulance diversions. The Interlock ransomware group claimed responsibility on June 4, 2025, and allegedly stole 941 GB of data, including patient and employee information. Kettering Health publicly acknowledged the ransomware group's link on June 6, 2025, and confirmed eradication of the threat actors' tools by June 5, 2025.
When was this signal reported?
Shadow Tier lists Jun 6, 2025 as the signal date.
Which organization is connected to this signal?
Ketteringhealth is the organization connected to this public signal.
Explore KetteringhealthWhich attack pattern is relevant?
This signal is connected to current ransomware incidents based on its reported incident context.
Explore current ransomware incidentsWhich impact area is relevant?
This signal is connected to data exposure and breach intelligence based on its reported consequences.
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