WannaCry Ransomware

Global ransomware worm exploiting Windows EternalBlue SMB vulnerability, infecting 200,000+ systems in 2017.

Core Principles & Analysis

• Crippled UK National Health Service hospitals, canceling thousands of appointments.
• Halted when researcher Marcus Hutchins registered its kill-switch domain.
• Systems patched with MS17-010, released two months earlier, were immune.