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

Hoken Minaoshi Hompo Group: ransomware attack

Ransomware was detected on February 16. About 5.1 million records relating to insurance applications, consultations and outsourced work were considered at risk. The completed investigation reported on August 29 confirmed encryption but found no evidence of external leakage or publication. Normal operations resumed in a verified environment.

Disclosed

2025-02-25

Organizations involved

1

Leaked or at risk

5.1M

5,100,000

Downtime

Unknown

Timeline

  1. Detected 2025-02-16
  2. Disclosed 2025-02-25
  3. 9 days

Attack or cause

Method
[Ransomware]
Impact
[Data leak][Service outage]
Entry point
Unknown

Data exposed or at risk

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

Organizations involved

Open in organization search

Sources

  1. [1][Official]当社グループにおけるランサムウェア被害に関しまして（第2報）Hoken Minaoshi Hompo Group, Inc. · 2025-04-30
  2. [2][Official]当社グループにおけるランサムウェア被害についての調査と再発防止策のご報告Hoken Minaoshi Hompo Group, Inc. · 2025-08-29