Exitium Claims to Have Stolen 5.8 TB of Data From Japanese Manufacturer KOIKE Sanso Kogyo
Summary
Ransomware group exitium claims it stole 5.8 TB of data from Japanese manufacturer KOIKE Sanso Kogyo and threatens to sell it unless the company makes contact by October 13, 2026. The claims are unverified.
Key points
- The extortion claim names KOIKE Sanso Kogyo Co. Ltd., a manufacturing company in Japan.
- The actor, exitium, claims to have exfiltrated 5.8 TB of data.
- The group threatens to sell the data if the company does not contact it by October 13, 2026.
- The claimed data includes agreements, confidential information, customer and client datasets, correspondence, and engineering drawings.
- The report says the claims are based on the ransomware group's public post and have not been independently confirmed.
Article Details
- Victim
- KOIKE Sanso Kogoyo Co. Ltd.
- Victim Domain
- koike-japan.com
- Claim Date
- 2026-10-10
- Encryption Status
- Unknown
- Exfiltration Status
- Claimed by exitium; not independently confirmed.
- Exfiltrated Data
- The claim lists agreements, confidential data, correspondence files, customer and client data, and engineering drawings.
- Exfiltrated Size
- 5.8 TB, according to exitium's claim.
- Ransom Demand
- None reported
- Leak Status
- exitium threatened to sell the data if the victim did not make contact by 2026-10-13; no publication is reported.