Dainichiseika Color & Chemicals Mfg. Co., Ltd.
Notice Regarding Ransomware Incident at a Consolidated Subsidiary (3rd Report / Final)
On December 15, 2025, a ransomware attack occurred at a Vietnamese subsidiary. Financial and tax data were encrypted but no traces of information leakage were found, and the impact on business results is minimal.
Key Figures
- Date of Ransomware Incident: 2025-12-15
- Affected Information: Financial and tax data, government agency reports, import/export and customs documents
- Impact on Business Results: Minimal
AI要約
Overview of the Ransomware Incident and Scope of Impact
On December 15, 2025, the data server and files on PCs of the Vietnamese local subsidiary "DAINICHI COLOR VIETNAM CO., LTD." were encrypted in a ransomware incident. The network was immediately disconnected and an investigation on the scope of impact was conducted with external experts. The encrypted data included financial and tax data, reports submitted to government agencies, and import/export and customs documents, but no evidence supporting information leakage was found.
Future Measures and Impact on Business Results
Vulnerability countermeasures on the intrusion path have been completed, and we will continue to reconstruct information security systems, introduce advanced security functions, and strengthen employee training. Core operations such as manufacturing and shipping are operating normally, and the impact on the Group’s business results from this incident is minimal.
Dainichi Seika Kogyo Co., Ltd.
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