SHINDO2

Accretive Co., Ltd.

RansomwareSize not disclosed

LEAK UNCLEARInvestigating

Open in the live monitor ▶
Disclosed
Oct 24, 2025
Leak
Unknown
Type
Ransomware
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

Cause

The system vendor misconfigured a firewall during replacement work, leaving some firewall functions disabled; a ransomware attack followed immediately and servers were encrypted

Timeline

  1. Immediately after the firewall replacement work
  2. Date of the Security NEXT report

Response

  • Blocked the entry point
  • Forensic investigation
  • More monitoring

What you should do

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

Lessons for companies

  1. Put security requirements, audit rights and reporting deadlines in vendor contracts
  2. Offline backups with restore drills; segment the network
  3. Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
  4. Run red teaming and AI-assisted hardening, and publish how much you invest

Sources