On March 12, 2026, Zscaler ThreatLabz discovered a malicious ZIP archive containing military-themed document lures targeting Chinese-speaking individuals. Our analysis of this sample uncovered a campaign leveraging a multi-stage attack chain where a trojanized SumatraPDF reader deploys an AdaptixC2 Beacon agent, ultimately leading to the download and abuse of Visual Studio (VS) Code tunnels for remote access. During our analysis, we observed that the threat actor likely targeted Chinese-speaking individuals in Taiwan, and individuals in South Korea and Japan. Based on the tactics, techniques, and procedures (TTPs) observed in this attack, ThreatLabz attributes this activity to Tropic Trooper (also known as Earth Centaur and Pirate Panda) with high confidence.