> JapanHacked_
[Contained][Severity: Major][Ransomware][Intrusion]

Anabuki Kosan: ransomware attack on the group

Server encryption detected February 3 was disclosed February 4. The April 3 report traced intrusion to a network-device vulnerability, followed by administrator takeover and ransomware on multiple servers. Some customer, applicant and employee information leaked; scope and counts remained under investigation. Business continued. JOINT Alpha member data and card data, which it did not hold, were excluded.

Disclosed

2026-02-04

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

Timeline

  1. Detected 2026-02-03
  2. Disclosed 2026-02-04
  3. 1 days

Organizations involved

Open in organization search

Sources

  1. [1][Official]ランサムウェア被害発生のお知らせAnabuki Kosan Inc. · 2026-02-04
  2. [2][Official]情報流出に関するお知らせとお詫び(第4報)Anabuki Kosan Inc. · 2026-04-03