APT15: A Comprehensive Intelligence BlogAPT15 (Ke3Chang / Nylon Typhoon) | China-Aligned Cyber Espionage APT

**Executive Summary:** APT15 (also known by many aliases such as Ke3Chang/Nylon Typhoon) is a long-running, China-aligned advanced persistent threat organization focused on strategic cyber espionage against governments, diplomatic missions, defense contractors and policy research organizations; the report details their tailored phishing and weaponized-document initial access methods, modular custom malware (including backdoors and loaders), multi-layered persistence, stealthy encrypted C2, and targeted data exfiltration designed to avoid detection.