China-Linked PlugX and Bookworm Malware Strike Asian Telecoms in Advanced Attack
In mid-2025, a coordinated advanced persistent threat (APT) campaign linked to China targeted telecommunications and manufacturing entities across Central and South Asia. Attackers leveraged new PlugX and Bookworm malware variants, utilizing DLL side-loading techniques via legitimate applications to achieve persistence and evade detection. The intrusions allowed the threat actors to perform extensive reconnaissance, deploy additional payloads, and exfiltrate sensitive operational data from ASEAN and Asian telecom networks, demonstrating a high degree of stealth and sophistication in lateral movement. This incident underscores a growing uptick in nation-state cyber activity against Asian critical infrastructure, highlighting emerging malware evolution and increasingly covert lateral movement. With similar TTPs proliferating, organizations must elevate east-west traffic security and anomaly detection to stay ahead.
Kill Chain