> JapanHacked_
[Contained][Severity: Critical][Ransomware]

Nippon Ceramic: ransomware and data leakage

An April 5 ransomware attack was detected on April 7. June's report put up to about 37,600 people and 1,500 companies at risk. September's update confirmed leakage concerning about 2,850 people and 900 companies, with another 35,650 people and 950 companies potentially exposed. Compromised systems were retired and operations continued in isolated environments.

Disclosed

2025-04-08

Organizations involved

1500

Leaked or at risk

37.6K

37,600

Downtime

Unknown

Timeline

  1. Started 2025-04-05
  2. Detected 2025-04-07
  3. Disclosed 2025-04-08
  4. 3 days

Attack or cause

Method
[Ransomware]
Impact
[Data leak][Service outage]
Entry point
Unknown
Affected, as stated
1,500

Data exposed or at risk

[Name][Postal address][Phone number][E-mail address][Date of birth][My Number][Employment]

Organizations involved

Open in organization search

Sources

  1. [1][Official]当社サーバーに対する不正アクセスに関するお知らせNippon Ceramic Co., Ltd. · 2025-04-08
  2. [2][Official]当社サーバーに対する不正アクセスに関するお知らせ(開示事項の経過)Nippon Ceramic Co., Ltd. · 2025-06-27
  3. [3][Official]当社サーバーに対する不正アクセスに関するお知らせ(開示事項の経過)Nippon Ceramic Co., Ltd. · 2025-09-26