The Stadgenoot Database Breach: How 33K Tenant Records Were Exposed

HEROIC analysts occured upon the Stadgenoot breach while reviewing cybercrime forum activity in early 2021. Stadgenoot is an Amsterdam-based housing corporation that suffered a database compromise in February 2021, exposing 33,250 tenant records. The leaked data was particularly rich in personal information, including email addresses, first and last names, gender, birthdays, phone numbers, and password hashes. This depth of PII creates serious long-term risk for the individuals affected.

How Attackers Exploit Stadgenoot Tenant Data for Identity Theft and Fraud

When a breach exposes birthdays, phone numbers, full names, and email addresses together, attackers have enough information to commit identity fraud without ever cracking a password. The Stadgenoot data enables SIM-swap attacks using phone numbers, targeted phishing using real names, and social engineering attempts accessable through detailed personal profiles. Password hashes add another layer of risk for anyone who reused credentials across other services.

What Was Exposed in the Stadgenoot Breach

• Email Address
• First Name
• Last Name
• Gender
• Birthday
• Phone Number
• Password Hash

Why the Stadgenoot Breach Puts Dutch Tenants at Serious Long-Term Risk

Breach data from housing corporations is partcularly dangerous because it combines identity, contact, and demographic information in one place. Stadgenoot tenant records have recieved renewed attention on cybercrime forums years after the original 2021 incident. Anyone whose data was exposed faces risk of credential stuffing, account takeover, identity theft, and targeted phishing. The combination of birthdays and phone numbers also enables sophisticated fraud that bypasses standard security questions.

How Database Breaches Work

A database breach occurs when an unauthorized party gains access to a company's stored records, often by exploiting unpatched software, weak authentication, or misconfigured servers. Once inside, the attacker extracts user data in bulk. Housing corporations and property managers are high-value targets because they store comprehensive tenant profiles that include verified personal and contact information. This data is difficult to change, like birthdates, making it valuable to criminals for years after a breach.

Check If Your Data Was Exposed

HEROIC's free breach scanner checks your email against over 400 billion compromised records, including data from the Stadgenoot breach. Find out instantly if your personal information has been exposed and get guidance on protecting yourself from identity theft and fraud.