SHINDO3

Takakatsu Group Holdings

RansomwareSize not disclosed

POSSIBLE LEAKPostal address / Phone numberClosed (final report)

Open in the live monitor ▶
Disclosed
Mar 17, 2026
Leak
Leak possible
Type
Ransomware
Status
Closed (final report)
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityName
ContactAddress, Phone number
Transactions & activityConstruction work details

Who is affected

  • Customers

Cause

The business server was attacked and data encrypted; route and vulnerability not disclosed

Timeline

  1. Intrusion began
  2. First disclosure

Response

  • Phishing warning

Warned customers about impersonation, spam and phishing

What you should do

  1. Treat refund or apology calls and texts as scams. Call back only on the number from the official site
  2. Watch for unexpected mail or invoices; your address is hard to change
  3. Check the company's notice to see if you're affected

Lessons for companies

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

Sources