Massive Data Breach: 2.7 billion Records from National Public Data Leaked on Dark Web
- Cyber Solin
- Aug 16, 2024
- 3 min read
Table of Contents

Overview of the National Public Data Breach
In August 2024, a massive data breach came to light when a hacker leaked 2.7 billion records from the background-checking service, National Public Data, on a dark web forum. This breach, considered one of the biggest in history, exposed sensitive information including Social Security Numbers (SSNs), names, mailing addresses, and other personal details. According to Bloomberg, the data may have been stolen from National Public Data at least four months prior to its disclosure.
How the Data Was Stolen
The breach is linked to an incident reported on April 8, 2024, when a cyber-criminal group known as USDod claimed access to the personal data of 2.9 billion individuals from the United States, United Kingdom, and Canada. They attempted to sell this data for a staggering $3.5 million. USDod allegedly obtained the database from another threat actor, SXUL, who initially accessed and extracted the data.
According to VX-Underground, a malware website, the data dump did not include information on individuals who had used data opt-out services, suggesting that certain privacy measures can provide some level of protection. On the dark web site "Breached," a user named "Fenice" later leaked 2.7 billion unencrypted records as two CSV files, totaling 277GB.
Implications of the Breach
The leaked records do not represent 2.7 billion unique individuals since each individual could have multiple records for different previous addresses. While some records are outdated or contain incorrect SSNs, many contain accurate and sensitive information, including details of deceased individuals and their relatives.
A class action complaint filed against National Public Data highlights that the company scrapes personal information from non-public sources to create profiles. This raises serious concerns about the legality and ethics of data collection practices. Many individuals may not have knowingly provided their data, yet they find themselves exposed in this breach.
Protecting Yourself from Data Breaches
If you suspect your data may have been compromised in this breach or similar incidents, here are some steps to safeguard your personal information:
Monitor Your Credit Reports: Regularly check your credit reports for any unauthorized activity or unusual changes.
Freeze Your Credit: Consider placing a credit freeze with major credit bureaus to prevent unauthorized access to your credit information.
Use Strong, Unique Passwords: Ensure that your passwords are strong and unique for each online account. Utilize a password manager to keep track of them.
Enable Multi-Factor Authentication (MFA): Add an extra layer of security to your accounts by enabling MFA wherever possible.
Be Vigilant Against Phishing Attempts: Stay alert for phishing emails or messages that attempt to trick you into providing personal information.
Steps for Businesses to Enhance Data Security
Businesses can take several measures to protect personal data and prevent future breaches:
Encrypt Sensitive Data: Ensure that all personal data is encrypted and securely stored.
Implement Multi-Factor Authentication: Require MFA for access to sensitive systems and data.
Conduct Regular Security Audits: Regularly assess and update security protocols and infrastructure to identify vulnerabilities.
Train Employees on Security Best Practices: Educate employees on recognizing phishing attempts, using secure networks, and handling sensitive data.
Deploy Threat Detection Tools: Utilize advanced threat detection and response tools to monitor and mitigate security threats in real-time.
Conclusion
The breach at National Public Data underscores the critical need for robust data security practices in both personal and business environments. By staying informed and taking proactive measures, individuals and businesses can better protect themselves against the ever-evolving landscape of cyber threats.
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