QILIN 4 Qilin ransomware escalates rapidly in 2025, targeting critical sectors with 700 attacks amid RansomHub shutdown Oct 27, 2025 Russia-linked hackers attack Texas electric cooperatives Oct 14, 2025 Nissan confirms design studio data breach claimed by Qilin ransomware Aug 25, 2025 Ransomware Gangs Collapse as Qilin Seizes Control Jun 18, 2025