Qilin Ransomware Claims Attack on Proterial, ex-Hitachi Metals
The Qilin ransomware gang listed Japan's Proterial, known as Hitachi Metals until 2023, on its leak site on Oct 29, 2026, per DailyDarkWeb. No details on the volume or type of data allegedly taken have been shared, and Proterial has not confirmed an incident. Partners should monitor statements and review dependencies with the maker.
What happened
The Qilin ransomware gang listed Proterial, a Japanese specialty steel and magnetic materials maker known as Hitachi Metals until 2023, on its leak site. The listing appeared on Oct 29, 2026. Per DailyDarkWeb, the claim has not been independently verified and Proterial has not confirmed a cyber incident.
Why it matters
Proterial reports about 16,000 group employees and supplies magnets, specialty steels and components to automotive, electronics and industrial customers worldwide. If the claim holds, stolen engineering and customer data could create supply-chain and third-party risk for its partners, per the source.
What to do
Monitor Proterial statements and map dependencies with the company. Review contacts and integrations with the maker pending confirmation of the incident.
For the technical team
- Affected
- Proterial Rede de TI da Proterial, Ltd., fabricante japonesa de materiais especiais com sede em Tóquio, conhecida como Hitachi Met · Proterial, Ltd., Tokyo-based materials maker (ransomware gang claim; no company confirmation).
- Exploitation
- Listing on Qilin's leak site reported by DailyDarkWeb on Oct 29, 2026 (UTC). No details on the volume or type of data allegedly taken. Unverified claim; Proterial has not publicly confirmed a cyber incident.
- Fix
- None involved; the incident has not been confirmed by the company.
- More details
- Proterial was known as Hitachi Metals until 2023 and produces specialty steel, magnetic materials, power-electronics materials, electric wire and cable, and automotive components, with about 16,000 group employees. The source classifies the case as an unverified threat-actor claim, not confirmation of a breach.
Timeline
Incident opened.
Sources 1 source
- @DailyDarkWeb @DailyDarkWeb
