Ransomware group netrunner hits Nippon Medical School Musashi Kosugi Hospital
Nippon Medical School Musashi Kosugi Hospital — a healthcare target operating in JP has been listed by the netrunner ransomware group on 2026-04-03. The information below reflects what the threat actor has publicly claimed on their leak site; the details have not been independently verified.
Incident Report
| Target Organization | Nippon Medical School Musashi Kosugi Hospital |
|---|---|
| Threat Group | netrunner |
| Summary | Nippon Medical School Musashi Kosugi Hospital is a 372-bed regional teaching hospital in Nakahara-ku, Kawasaki (Musashi-Kosugi area), affiliated with Nippon Medical School. Established in 1937, it offers comprehensive services across 36 clinical departments, including emergency and critical care, ICU, NICU, perinatal and pediatric care, cancer treatment, and minimally invasive endovascular procedures. The hospital serves as a regional hub with disaster-resistant facilities and an on-site heliport, and emphasizes advanced, patient-centered care and medical education. |
| Date of Breach | 2026-04-03 |
| Discovery Date | 2026-04-03 |
| Region | JP |
| Target Domain | www.nms.ac.jp/kosugi-h |
| Business Sector | Healthcare |
| Severity | MEDIUM |
Claim by netrunner
Nippon Medical School Musashi Kosugi Hospital is a 372-bed regional teaching hospital in Nakahara-ku, Kawasaki (Musashi-Kosugi area), affiliated with Nippon Medical School. Established in 1937, it offers comprehensive services across 36 clinical departments, including emergency and critical care, ICU, NICU, perinatal and pediatric care, cancer treatment, and minimally invasive endovascular procedures. The hospital serves as a regional hub with disaster-resistant facilities and an on-site heliport, and emphasizes advanced, patient-centered care and medical education.
Posted by the netrunner threat actor on its public leak site. This is the group's own statement and has not been independently verified by HackerFeeds.
Sources
Victim website
www.nms.ac.jp/kosugi-h
Leak post (onion / Tor)
http://netrunrsb3bivj5gnwajzxlig5qkteb6edgthxj7fmsvhkzxtwfxwaad.onion/view/MusashiKosugi
Open this URL in Tor Browser. Browsing leak sites carries real risk — view passively, never click further.
Disclaimer
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