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New Lua-based malware “LucidRook” observed in targeted attacks against Taiwanese organizations

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Cisco Talos uncovered a cluster of activity we track as UAT-10362 conducting spear-phishing campaigns against Taiwanese non-governmental organizations (NGOs) and suspected universities to deliver a newly identified malware family,

Cisco Talos uncovered a cluster of activity we track as UAT-10362 conducting spear-phishing campaigns against Taiwanese non-governmental organizations (NGOs) and suspected universities to deliver a newly identified malware family, “LucidRook. ”  LucidRook is a sophisticated stager that embeds a Lua interpreter and Rust-compiled libraries within a dynamic-link library (DLL) to download and execute staged Lua bytecode payloads.

 The dropper “LucidPawn” uses region-specific anti-analysis checks and executes only in Traditional Chinese language environments associated with Taiwan.   Talos identified two distinct infection chains used to deliver LucidRook, involving malicious LNK and EXE files disguised as antivirus software.

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