Storm-1175, a China-based cybercriminal group, deploys Medusa ransomware using high-velocity attacks with n-day and zero-day exploits. They rapidly move from initial access to data exfiltration and ransomware deployment within 24 hours to a few days. The group chains multiple exploits for persistence by creating new user accounts, deploying remote monitoring software, stealing credentials, and disabling security software. They weaponize vulnerabilities within a day and sometimes exploit them a week before patches are released. Recent attacks heavily impact healthcare, education, professional services, and finance sectors in Australia, UK, and US.