> JapanHacked_
[Contained][Severity: Major][Intrusion][Misconfiguration]

444: intruders entered the TechFUL programming skills service via a development server, putting about 45,000 user accounts at risk, with a ransom demand

A development server with poor access limits was breached and the production database may have been compromised, putting 45,576 individual user accounts and more at risk.

Disclosed

2024-12-25

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

What happened

  1. It received an alert email from its cloud management company about suspicious network activity. [1]

  2. It announced the case. The investigation found that a development server with flawed access control had been breached from outside, and that the production database used in development might have been compromised. A message demanding a ransom to keep data from being published was also found. [1] [2]

Impact

The accounts at risk are 45,576 individual TechFUL users who registered on or before August 13, 2023, plus 475 school accounts and 264 company accounts. Passwords were hashed, but it urged password changes because they could be cracked. [1]

Timeline

  1. Detected 2024-12-11
  2. Disclosed 2024-12-25
  3. 14 days

Attack or cause

Method
[Intrusion][Misconfiguration]
Impact
[Data leak][Extortion]
Entry point
Unknown

Data exposed or at risk

[Name][Postal address][Passwords]

Organizations involved

Open in organization search

Sources

  1. [1][News]「TechFUL」ユーザーアカウント約4万5千件漏えい懸念│444株式会社cybersecurity-jp.com · 2025-01-06
  2. [2][News]機密データ公開しないことを条件に身代金を要求 ~「TechFUL」サーバに不正アクセスScanNetSecurity · 2025-01-10 08:05