Ransomware Attacks Surge 50% In 2025, Qilin Leads Wave

Cyble's September 2025 threat landscape report highlights a 50% year-over-year surge in ransomware through Oct 21, 2025 (5,010 claimed victims), with Qilin leading September activity and several newcomer groups (e.g., The Gentlemen, Sinobi) emerging; it documents major supply-chain incidents, significant data exfiltration claims across multiple sectors and countries (notably the U.S. and South Korea), and provides prioritized mitigation recommendations such as vulnerability management, network segmentation, MFA, immutable backups, and enhanced monitoring.