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Yin Chang

As seen in: Medium, TODAY, American Chemical Society, Royal Society of Chemistry, BioRxiv, Security Boulevard, Semiconductor Engineering, British Columbia Medical Journal, Mochi Magazine
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Articles

Tropic Trooper Pivots to AdaptixC2 and Custom Beacon Listener

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By Yin Chang
| Security Boulevard Verified
The post Tropic Trooper Pivots to AdaptixC2 and Custom Beacon Listener appeared first on Security Research | Blog. IntroductionOn March 12, 2026, Zscaler ThreatLabz discovered a malicious ZIP archive containing military-themed document lures targeting Chinese-speaking individuals.
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China-nexus Threat Actor Targets Persian Gulf Region With PlugX

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By Sudeep Singh, Yin Chang
| zscaler.com
T1587.001 Develop Capabilities: Malware The threat actor developed custom PlugX loaders. T1588.001 Resource Development: Obtain Capabilities, Malware The threat actor used the PlugX backdoor, a known backdoor commonly used by China-nexus threat actors. T1608.001 Resource Development: Stage Capabilities: Upload Malware The threat actor staged a malicious CHM file on a threat actor-controlled server.
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APT Attacks Target Indian Government Using SHEETCREEP, FIREPOWER, and MAILCREEP | Part 2

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By Yin Chang
| Security Boulevard Verified
This is Part 2 of our two-part technical analysis on the Gopher Strike and Sheet Attack campaigns. For details on the Gopher Strike campaign, go to Part 1.IntroductionIn September 2025, Zscaler ThreatLabz uncovered three additional backdoors, SHEETCREEP, FIREPOWER, and MAILCREEP, used to power the Sheet Attack campaign.
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