On September 11, 2025, The Moinian Group, a major U.S. real estate firm managing office buildings, hotels, retail spaces, and residential properties, fell victim to a ransomware attack by the cybercriminal group Abyss. The attackers exfiltrated 4.7 terabytes of uncompressed data, including personally identifiable information (PII) such as names, addresses, Social Security numbers, financial records, lease agreements, and confidential business documents. The breach potentially affects clients, tenants, employees, and business partners, though the exact number of impacted individuals remains undisclosed.The ransomware group threatened to leak or sell the stolen data unless their demands were met. The Moinian Group has not issued a public response but is likely collaborating with cybersecurity experts to assess the damage and comply with state and federal disclosure requirements. The incident was first disclosed on the dark web via Abyss’s Tor-based leak site, raising concerns over identity theft, financial fraud, and reputational harm. Affected individuals are advised to monitor financial accounts, place fraud alerts, and remain vigilant against phishing attempts.