The Moinian Group Data Breach Lawsuit

On September 11, 2025, The Moinian Group, a prominent real estate development company, fell victim to a devastating ransomware attack by the cybercriminal group Abyss. The attackers claimed responsibility for stealing a massive 4.7 terabytes of uncompressed data, including sensitive personal and business information.

The Moinian Group’s Data Breach Investigation

The Moinian Group operates a diverse portfolio of real estate properties, including office buildings, hotels, retail spaces, and residential apartments in multiple U.S. cities. On September 11, 2025, the cybercriminal group Abyss publicly claimed responsibility for the ransomware attack and posted details of the breach on their Tor-based leak site. According to the group, 4.7 terabytes of data was stolen from The Moinian Group’s systems during the attack.

The ransomware group threatened to leak or sell the stolen data unless their demands were met, heightening concerns for those whose personal information may have been exposed. While the total number of affected individuals has not been disclosed, it is believed that the breach could impact clients, tenants, employees, and business partners, with potentially catastrophic consequences for all parties involved.

The compromised data may include personally identifiable information (PII), such as names, addresses, contact details, Social Security numbers, financial records, lease agreements, and possibly confidential business documents. This kind of exposure poses significant risks for identity theft, financial fraud, and other malicious activity.

At present, The Moinian Group has not issued a public statement regarding the attack, but it is expected that the company is working with cybersecurity experts to assess the full extent of the breach and determine which individuals have been impacted. Additionally, the company will likely make the required state and federal disclosures once the investigation is complete.

When Did This Breach Occur?

The ransomware attack on The Moinian Group was reported on September 11, 2025, when the Abyss group made their claim on the dark web. The breach involved the theft of 4.7 terabytes of data, with the attackers threatening to sell or leak the data if their demands were not met. The attack itself is believed to have occurred shortly before the disclosure, but specific details regarding the timeline remain unclear.

What Information Was Breached?

The breach exposed a vast amount of sensitive data, which may include:

• Personally Identifiable Information (PII):
  • Names
  • Addresses
  • Contact details
  • Social Security numbers
• Financial Information:
  • Financial records
• Lease and Contract Information:
  • Lease agreements and possibly other confidential business documents

The exposure of such sensitive data leaves individuals vulnerable to identity theft, financial fraud, and other malicious uses of personal information.

What You Can Do

If you believe your information was impacted by the Moinian Group data breach, here are some steps you can take to protect yourself:

1. Monitor Financial Accounts: Regularly review your bank statements, credit card accounts, and other financial accounts for any unauthorized transactions.
2. Check Your Credit Reports: Obtain your free credit report from the three major credit bureaus—Equifax, Experian, and TransUnion—and look for any suspicious activity or new accounts opened in your name.
3. Consider Fraud Alerts or Credit Freezes: To protect your credit and prevent unauthorized access, consider placing a fraud alert or credit freeze with the major credit bureaus.
4. Be Alert for Phishing Scams: Be cautious of unsolicited emails, phone calls, or messages that may attempt to exploit your exposed information. Do not provide any personal details unless you are sure of the sender’s identity.
5. Stay Informed: Keep an eye out for any communications from The Moinian Group or related businesses regarding the breach. Follow any instructions they provide to protect your data.

If you need further guidance or legal advice, fill out our quick, secure form to connect with a lawyer specializing in data breach cases.

File a Data Breach Lawsuit Against The Moinian Group

If you have received a notification about this breach or suspect your personal information was compromised, you may be entitled to file a class action lawsuit and seek compensation for the damages caused by the exposure of your sensitive data.

Data breaches like this one can have long-term effects, including identity theft, financial fraud, and emotional distress. The Moinian Group’s failure to secure its network has placed its clients, tenants, and business partners at serious risk, and you may be eligible for compensation.

At Class Action U, we can help connect you with experienced attorneys who specialize in data breach lawsuits. These legal professionals can help you navigate the legal process and pursue the compensation you deserve.

Fill out our secure form today for a free consultation. There is no cost to reach out to our legal partners, and no obligation unless you decide to take further action. Join the fight for justice today—your voice matters.