JACCS: ransomware hit its servers and encrypted data of its electronic form service

1. 2023-07-25

   It confirmed unauthorized access to its servers. To stop the damage from spreading it cut external communications and had an outside expert run a forensic investigation. [1] [2] [3]

2. 2023-07-28

   It announced the case, saying that the use of loans, credit cards and other services was not affected. [1] [2]

3. 2023-08-16

   It published a follow-up. Ransomware had encrypted the data of its electronic form service, which handles settlement data with merchants. No trace of a leak has been confirmed. [3]

The encrypted data of the electronic form service includes personal information. Loans, credit cards and other services were not affected, and no trace of a leak has been confirmed. [3]