SHINDO4

Tokyo Hoso Kogyo

RansomwareSize not disclosed

POSSIBLE LEAKBank account / Postal addressInvestigating

Open in the live monitor ▶
Disclosed
May 12, 2026
Detected
Apr 2, 2026
Detection to disclosure
40 days
Leak
Leak possible
Type
Ransomware
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

Business dataCompany name, Contact name
ContactEmail address, Address
Financial & paymentBank account details
IdentityName, Date of birth

Who is affected

  • Customers
  • Business partners
  • Employees

Cause

Ransomware attack by a third party; the route is not stated in the article

Timeline

  1. Detected
  2. First disclosure

Response

  • Blocked the entry point
  • Forensic investigation
  • Notified individuals
  • Phishing warning

Isolated affected devices and investigated with an outside firm; notified current partners and employees individually; warned about suspicious contacts

What you should do

  1. Scammers who know your account number pose as refund staff. No bank or company asks for your PIN
  2. Don't open links in emails from this company. The apology email itself may be fake
  3. Watch for unexpected mail or invoices; your address is hard to change
  4. Expect targeted phishing posing as HR or interview contacts
  5. Check the company's notice to see if you're affected

Lessons for companies

  1. Offline backups with restore drills; segment the network
  2. Don't keep ID or bank data: delete after checks or use a KYC provider
  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