China-Linked Cyber Espionage: How OP-512 Exploited Legacy IIS Servers and Evaded Detection

Your team built defenses around known China-linked clusters. The file hashes are tracked. The behavioral patterns are documented. What those weren't built to catch is a new cluster that studied those exact defenses and engineered around them. A China-linked attacker compromised an internet-facing IIS server, maintained access for over 75 days, and came back on fresh infrastructure. With four China-linked clusters converging on the same legacy IIS stack in twelve months, defenders building det...