SHINDO2

Kobayashi Co., Ltd.

Unauthorized accessSize not disclosed

LEAK CONFIRMEDInvestigating

Open in the live monitor ▶
Disclosed
Nov 6, 2025
Detected
Nov 4, 2025
Detection to disclosure
2 days
Leak
Leak confirmed
Type
Unauthorized access
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

UnspecifiedInformation on servers

Cause

Information on servers was stolen; no ransomware encryption or system outage

Timeline

  1. World Leaks claimed the attack
  2. Detected
  3. First disclosure

Response

  • Forensic investigation

Investigating with an outside security firm; reported to the police and the PPC

What you should do

  1. Check the company's notice to see if you're affected

Lessons for companies

  1. Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
  2. Run red teaming and AI-assisted hardening, and publish how much you invest

Sources