Arbeitsgemeinschaft Wirtschaftlichkeitsprüfung Niedersachsen e.V. (Arwini)
May 5, 2026
•[ ransomware, data exfiltration, health information ]
Kairos ransomware actors attacked Arbeitsgemeinschaft Wirtschaftlichkeitsprfung Niedersachsen e.V. (Arwini), the prescription-review association for statutory health insurance prescriptions in Lower Saxony. Police confirmed Kairos was responsible, that ransomware was used to encrypt data, and that data exfiltration occurred. Potentially affected data included contact, health, and billing information for patients; more than 70,000 records may have been stolen, though the exact scope remained under investigation.
Monterrey Water Utility
February 26, 2026
•[ unauthorized access, data leak, billing information ]
Attackers gained unauthorized access to Monterreys municipal water utility databases and stole internal and customer records. The exposed data reportedly includes billing and account information linked to utility customers.
