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HexEval Loader is a hex-encoded loader that collects host data, decodes follow-on scripts and acts as a downloader for the BeaverTail malware. HexEval Loader was first reported in April 2025. HexEval Loader has previously been leveraged by North Korea-affiliated threat actors identified as Contagious Interview. HexEval Loader has been delivered to victims through code repository sites utilizing typosquatting naming conventions of various npm packages.(Citation: Socket Contagious Interview NPM April 2025)(Citation: Socket BeaverTail XORIndex HexEval Contagious Interview July 2025)(Citation: Socket HexEval BeaverTail Contagious Interview June 2025)