This record tracks a ransomware attack claimed by the
Climax Inc group against
Maruki Medical Systems Inc.. It collects the publicly disclosed attack details — sector, location and
timeline — as published on the operator's leak site and indexed by Breach House.
Window Zero
EXPOSURE GAP
Window Zero is the time the breach stayed in the open before
anyone said so — the gap between when the attack was first discovered
on the operator's leak site (t1) and when it was publicly disclosed (t2).
The wider this window, the longer victims, staff and customers were exposed with no warning.
20days open
t1 · Published
t2 · Pending
Indexed by Breach House
November 10, 2026
Leak Status
leaked
checked 2026-11-10
Disclosed / Notified
Not disclosed yet
Attack Summary
maruki-ms.co.jp is a company based in Japan operating within the IT sector, providing digital services and infrastructure solutions. The entity has been documented within a threat-intelligence index under the classification of ransomware victim, with an associated threat actor identified as Climax Inc. This listing reflects cybersecurity intelligence concerning the organization's exposure to ransomware activity and its role within the incident landscape. The description maintains factual neutrality regarding the nature of the threat without speculating on unverified details such as data exfiltration scope or operational impact. Maruki-ms.co.jp serves as a reference point for analysts tracking ransomware campaigns in the Japanese IT environment and their connections to identified threat actors.
Leak Screenshots
2 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-11-10. Verdict evidence: [M1] PUBLISHED
Proof files published by the operator —
1 image(s) harvested from this entry.
Content is locked; type and dimensions shown.
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Dark Web Exposure
Findings for maruki-ms.co.jp
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
59+
found in Traditional breaches
1+
found in Ransomware leaks
2844Breaches_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Zurich.7z
DBs Backup · breach
••• emails
Japan.rar
🇷🇺Alexei Error504🇷🇺 · breach
••• emails
Full Clouds Cit0day_2.7z.001
DBs w MTDT · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
B F R e p o V 3 F i l e s · breach
••• emails
B F R e p o V 3 F i l e s · breach
••• emails
+ 12 more leak sources locked
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