Ransomware group exitium hits KOIKE Sanso Kogoyo Co. Ltd.
KOIKE Sanso Kogoyo Co. Ltd. — a manufacturing target operating in JP has been listed by the exitium ransomware group on 2026-10-10. 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 | KOIKE Sanso Kogoyo Co. Ltd. |
|---|---|
| Threat Group | exitium |
| Summary | Website: koike-japan.com You have time until Tuesday(10.13.2026). If you wouldn't contact us we will start selling data. We have 5.8 TB of data: agreements confidential data correspondence files all customers and clients data engineering drawings AND MUCH MORE... Contact us until your time runs out. |
| Date of Breach | 2026-10-10 |
| Discovery Date | 2026-10-10 |
| Region | JP |
| Target Domain | — |
| Business Sector | Manufacturing |
| Severity | MEDIUM |
Claim by exitium
Website: koike-japan.com You have time until Tuesday(10.13.2026). If you wouldn't contact us we will start selling data. We have 5.8 TB of data: agreements confidential data correspondence files all customers and clients data engineering drawings AND MUCH MORE... Contact us until your time runs out.
Posted by the exitium threat actor on its public leak site. This is the group's own statement and has not been independently verified by HackerFeeds.
Sources
Leak post (onion / Tor)
http://m3ksukzn2glzfdvlusohril7n3iyk4z4fudf6mm22lwhpbpt5aiee5qd.onion#KOIKE%20Sanso%20Kogoyo%20Co.%20Ltd.
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Disclaimer
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