SHINDO2

Gunma Prefecture

Students324people

POSSIBLE LEAKPhishing · Closed (final report)

Open in the live monitor ▶
Disclosed
Jan 8, 2026
Leak
Leak possible
Type
Phishing
Status
Closed (final report)
Security spend
Not checked yet
Compensation
Not announced

What leaked

UnspecifiedStudents' personal data

How many

  • Students 324 people

Who is affected

  • Students at three prefectural high schools and the prefectural agriculture and forestry college

Cause

While making teaching materials at home, a fake warning appeared; the teacher called the number shown and, following instructions, let a third party remotely control the personal PC

Timeline

  1. Intrusion began
  2. Security NEXT report date

Response

  • Blocked the entry point

Cut the connection on realizing it was a scam and examined the device

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