Silent Chollima: North Korea’s Dual-Track Cyber Weapon

**Silent Chollima (APT45)** is profiled as a North Korea–linked, hybrid APT that combines espionage and financially motivated cyber operations—using spear-phishing, VPN/web-application exploits, living‑off‑the‑land tools, cloud-based persistence and C2, and malware families such as DTrack, Maui, and KEYMARBLE—to target healthcare, defense, financial and cryptocurrency sectors from 2013 through 2025; the report reviews notable campaigns, evolving ransomware and supply‑chain tactics, and provides defensive recommendations (zero trust, patching, credential management, and threat hunting).