Tick APT Group (BRONZE BUTLER): A Long-Running East Asian Cyber Espionage Actor

### Executive Summary This report profiles the Tick (Bronze Butler) APT as a long-running, China-linked espionage actor focused on East Asian government, defense, and industrial targets; it highlights Tick’s patient, low-noise tradecraft (spear-phishing, custom loaders/backdoors, stealthy HTTP/S C2, persistence via registry/task/service entries), its regional targeting and operational history, and provides defensive guidance around phishing controls, long-term monitoring, outbound traffic review, and patch management.