Ransomware Group exitium Hits: KOIKE Sanso Kogoyo Co. Ltd.
Summary
In the latest cybersecurity news, KOIKE Sanso Kogoyo Co. Ltd. — an organization based in JP — has fallen victim to a ransomware attack conducted by the group exitium. This data breach, discovered on 2026-10-10T14:31:50.448423+00:00, underscores the increasing need for proactive cybersecurity defenses as we continue through 2026.
Incident Report
| Attribute | Information |
|---|---|
| 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 | 2026-10-10T14:31:32.355306+00:00 |
| Discovery Date | 2026-10-10T14:31:50.448423+00:00 |
| Region | JP |
| Target Domain | koike-asia.com |
| Business Sector | Manufacturing |
How to reduce your ransomware risk
Most ransomware intrusions start with a stolen password or a phishing email. A few proactive steps sharply cut your exposure:
- train staff to spot attacks — close the gap attackers exploit.
- monitor the dark web for leaked logins — close the gap attackers exploit.
Want to know if you’re already exposed? Run a free scan with the HookPhish data breach checker.
Disclaimer
HookPhish does not engage in the exfiltration, downloading, taking, hosting, viewing, reposting, or disclosure of any stolen information. All breach data reported here is sourced from publicly available threat intelligence feeds for awareness purposes only.
