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The ransomware group Interlock has claimed responsibility for the recent cyberattack on Kettering Health, a US healthcare organization comprised of hospitals, clinics, and medical centers in Ohio. The attack, which initially disrupted the healthcare system on May 20th, forced the shutdown of all computer systems and has left Kettering Health struggling to fully recover over two weeks later. CNN first reported on Interlock’s involvement in the breach, but at the time, the group had not publicly taken credit, leading to speculation that ransom negotiations might be underway. However, Interlock has now come forward, potentially indicating that negotiations with Kettering Health have been unsuccessful.

Interlock announced its involvement by posting alleged stolen data on its dark web site, claiming to have exfiltrated over 940 gigabytes of data from Kettering Health’s internal network. A preliminary review of the posted files indicates that the stolen data includes sensitive private health information, such as patient names, patient numbers, and detailed clinical summaries. These summaries contain sensitive information including mental status assessments, medication lists, health concerns, and other specific details about patients' medical conditions. The stolen data also encompasses employee information and the contents of shared drives, raising concerns about further potential privacy breaches.

The cyberattack has severely impacted Kettering Health's operations. Since the initial breach, numerous medical procedures have been canceled or postponed, forcing healthcare professionals to revert to paper-based documentation. This digital standstill has significantly affected clinical care for approximately 1.5 million patients annually. While Kettering Health has reported progress in restoring its systems, including bringing the electronic health record (EHR) system "Epic" back online with the help of around 200 employees, the full extent of the damage and the long-term consequences of the data breach are still unfolding.

ImgSrc: www.it-daily.ne

References :

• infosec.exchange: Ransomware gang Interlock claims responsibility for the Kettering Health hack, posting some alleged stolen data on its dark web site. Data includes private health information, such as patient names, patient numbers, and clinical summaries written by doctors, which include categories such as mental status, medications, health concerns, and other categories of patient data.
• techcrunch.com: Ransomware gang Interlock claims responsibility for the Kettering Health hack, posting some alleged stolen data on its dark web site. Data includes private health information, such as patient names, patient numbers, and clinical summaries written by doctors, which include categories such as mental status, medications, health concerns, and other categories of patient data.
• www.it-daily.net: Report on a ransomware attack on Kettering Health.
• techcrunch.com: Health giant Kettering still facing disruption weeks after ransomware attack
• The Register - Security: Ransomware scum leak patient data after disrupting chemo treatments at Kettering
• BleepingComputer: Kettering Health confirms Interlock ransomware behind cyberattack
• www.bleepingcomputer.com: Details about the leaked data.

Classification:

• HashTags: #RansomwareAttack #HealthcareSecurity #Cybersecurity
• Company: Kettering Health
• Target: Kettering Health
• Attacker: Interlock
• Product: Healthcare
• Feature: Ransomware
• Malware: Interlock ransomware
• Type: Ransomware
• Severity: Major