State-Sponsored Cyber Operations in Southeast Asia: A 2026 Assessment

Executive Summary

As of March 2026, Southeast Asia continues to be a focal point for state-sponsored cyber operations, particularly those attributed to Chinese threat actors. These campaigns primarily aim to gather intelligence on regional governments and critical infrastructure, aligning with China's geopolitical interests.

Chinese State-Sponsored Cyber Espionage

Chinese advanced persistent threat (APT) groups have been actively targeting Southeast Asian nations, including Malaysia, Indonesia, Vietnam, the Philippines, Laos, Cambodia, and Thailand. These operations are believed to support China's Belt and Road Initiative (BRI), focusing on intelligence collection related to territorial disputes in the South China Sea and strategic projects associated with the BRI. (thecyberwire.com)

A notable example is the group known as Silver Dragon, likely affiliated with APT41. Since mid-2024, Silver Dragon has conducted cyber-espionage campaigns targeting government entities in Southeast Asia and Europe. The group employs sophisticated techniques to evade detection, embedding malware within legitimate services such as Google Drive and core Windows components like Windows Update and .NET utilities. Their custom backdoor, GearDoor, uses Google Drive for command-and-control operations, disguising communication as regular file uploads and downloads. (techradar.com)

Targeted Sectors and Techniques

The primary targets of these cyber espionage campaigns are government entities and critical infrastructure sectors, including telecommunications and financial services. For instance, in 2025, Chinese state-sponsored APT groups conducted sustained cyber espionage campaigns against ASEAN and Asian government networks, demonstrating coordinated intelligence collection aligned with Beijing’s geopolitical priorities. (linkedin.com)

In the telecommunications sector, the group CL-STA-0969, with significant overlap with China-linked Liminal Panda, employed advanced anti-detection techniques and operational security measures. Their attacks involved brute-force methods to facilitate compromise, utilizing tools such as the AuthDoor Pluggable Authentication Module for credential theft and persistent access, the Cordscan network scanning tool, the GTPDOOR malware, and the EchoBackdoor backdoor. Initial access was leveraged to deploy the Serving GPRS Support Node emulator, ChronosRAT payload, and NoDepDNS backdoor. (scworld.com)

Implications and Recommendations

The persistence and sophistication of state-sponsored cyber operations in Southeast Asia underscore the need for enhanced cybersecurity measures. Organizations should prioritize securing critical infrastructure, implementing robust detection and response capabilities, and fostering regional cooperation to mitigate the risks associated with these cyber threats.

Given the evolving nature of cyber threats, continuous monitoring and adaptation of cybersecurity strategies are essential to safeguard national interests and maintain regional stability.

Highlights:

• Chinese hackers hide malware within Windows and Google Drive to hit government targets, Published on Thursday, March 05