Seiko Group: ransomware hit its servers and about 60,000 pieces of personal data of group companies leaked

1. 2023-07-28

   It confirmed unauthorized access by a third party to some servers. [1] [3]

2. 2023-08-02

   It asked an outside expert organization to investigate. [1] [3]

3. 2023-08-10

   It announced the case, saying that part of the group information stored on the servers may have leaked. [1] [3]

4. 2023-08-22

   It published a follow-up. The unauthorized access turned out to be a ransomware attack, and a leak of some information on group company employees and related people was confirmed. It has reported to the Personal Information Protection Commission and is working with investigators. [2] [4]

5. 2023-10-25

   It published a third report. It confirmed that about 60,000 pieces of personal data of Seiko Group, Seiko Watch and Seiko Instruments leaked in the ransomware attack. [5] [6]

About 60,000 pieces of personal data were confirmed leaked. They include Seiko Watch customers (name, address, phone number and email address; no credit card data), contacts at business partners, applicants to Seiko Group and Seiko Watch, and employees and former employees of group companies. [5] [6]