Brinztech Alert: Alleged Real Estate and Property Database of China is on Sale

Dark Web News Analysis

A threat actor on a known cybercrime forum is advertising an alleged real estate and property database from China, comprising 143,535 records. The dataset, likely sourced from bj.pc.zhipaicn.com (a broker-facing platform), includes sensitive personal information such as username, name, mobile, payment_status, and idcardno.

This claim, if true, represents another critical data breach in what has become a systemic crisis of data loss in China. Throughout 2024 and 2025, massive leaks—including a catastrophic 4-billion-record breach in May 2025 and a separate “Property Owners Database” leak—have exposed the residential, financial, and government ID data of hundreds of millions of Chinese citizens.

While smaller, this new 143k-record leak is highly targeted. It appears to be a full database from a broker or agency, containing not just PII but also internal IDs (companyid, brokerid) and financial data (payment_status). The inclusion of the idcardno (Chinese national ID number) alongside this data provides a complete toolkit for criminals to commit identity theft, financial fraud, and highly targeted social engineering.

Key Cybersecurity Insights

This alleged data breach presents a critical threat to the individuals in the database:

• Extensive PII Exposure: The presence of name, mobile, and idcardno in 143,535 records signifies a major breach of Personally Identifiable Information (PII), creating high risks for identity theft, fraud, and targeted social engineering attacks against individuals in China.
• Financial and Property-Related Risks: The inclusion of payment_status and property-specific details (block) could be exploited for financial scams, extortion, or even physical targeting of individuals and their assets.
• Third-Party and Supply Chain Vulnerability: The data fields like companyid and brokerid suggest that the compromise might originate from a real estate agency, property management firm, or a related third-party service provider, highlighting a critical supply chain security failure.
• Facilitation of Highly Targeted Attacks: The detailed demographic and property information allows threat actors to craft highly convincing and personalized phishing campaigns, ransomware attacks, or other forms of fraud tailored to specific individuals or companies within the Chinese real estate sector.

Mitigation Strategies

In response to this claim, organizations in this sector must take immediate and decisive action:

• Implement Robust Data Loss Prevention (DLP) Controls: Deploy and continuously monitor advanced DLP solutions to detect and prevent unauthorized exfiltration of sensitive data, especially PII, from internal systems and third-party integrations.
• Strengthen Third-Party Risk Management (TPRM): Conduct stringent security audits and continuous monitoring of all third-party vendors and partners (e.g., real estate brokers, property management software providers) that handle or have access to sensitive client data.
• Enhance Multi-Factor Authentication (MFA) and Access Controls: Enforce mandatory MFA for all internal and customer-facing systems, coupled with strict role-based access controls to limit who can access sensitive property and personal data.
• Proactive Employee and Customer Security Awareness Training: Regularly educate employees on recognizing and reporting phishing, social engineering tactics, and potential insider threats, while also advising customers on safeguarding their personal information and being wary of unsolicited communications.

Secure Your Organization with Brinztech As a cybersecurity provider, we can protect your business from the threats discussed here. Contact us to learn more about our services.

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