The Insomnia ransomware group listed Southern Illinois Dermatology on its website in February, claiming to have stolen the information of 150,000 patients. The cybercriminals have leaked the data allegedly taken from the healthcare organization’s systems.The third significant data breach hitSaint Anthony Hospital, which told the HHS that an email security incident exposed the information of 146,000 people.The Chicago, Illinois-based hospital said two employee email accounts were compromised, exposing patients’ personal and health information. The intrusion occurred in February 2025.While it does not seem to be related, Saint Anthony Hospital was previously targeted by the LockBit ransomware group, which listed the organization on its leak website in January 2024.Related:Other Healthcare Security IncidentsRelated:Data Breach at Tennessee Hospital Affects 337,000Related:Massachusetts Hospital Diverts Ambulances as Cyberattack Causes Disruption

The third significant data breach hitSaint Anthony Hospital, which told the HHS that an email security incident exposed the information of 146,000 people.The Chicago, Illinois-based hospital said two employee email accounts were compromised, exposing patients’ personal and health information. The intrusion occurred in February 2025.While it does not seem to be related, Saint Anthony Hospital was previously targeted by the LockBit ransomware group, which listed the organization on its leak website in January 2024.Related:Other Healthcare Security IncidentsRelated:Data Breach at Tennessee Hospital Affects 337,000Related:Massachusetts Hospital Diverts Ambulances as Cyberattack Causes Disruption

The Chicago, Illinois-based hospital said two employee email accounts were compromised, exposing patients’ personal and health information. The intrusion occurred in February 2025.While it does not seem to be related, Saint Anthony Hospital was previously targeted by the LockBit ransomware group, which listed the organization on its leak website in January 2024.Related:Other Healthcare Security IncidentsRelated:Data Breach at Tennessee Hospital Affects 337,000Related:Massachusetts Hospital Diverts Ambulances as Cyberattack Causes Disruption

While it does not seem to be related, Saint Anthony Hospital was previously targeted by the LockBit ransomware group, which listed the organization on its leak website in January 2024.Related:Other Healthcare Security IncidentsRelated:Data Breach at Tennessee Hospital Affects 337,000Related:Massachusetts Hospital Diverts Ambulances as Cyberattack Causes Disruption

Related:Other Healthcare Security IncidentsRelated:Data Breach at Tennessee Hospital Affects 337,000Related:Massachusetts Hospital Diverts Ambulances as Cyberattack Causes Disruption

Related:Data Breach at Tennessee Hospital Affects 337,000Related:Massachusetts Hospital Diverts Ambulances as Cyberattack Causes Disruption

Related:Massachusetts Hospital Diverts Ambulances as Cyberattack Causes Disruption

Eduard Kovacs (@EduardKovacs) is senior managing editor at SecurityWeek. He worked as a high school IT teacher before starting a career in journalism in 2011. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

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Source: SecurityWeek