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Fri, October 17, 2025

North Korean Actors Abuse Blockchains for Malware Delivery

🛡️ Google Threat Intelligence Group (GTIG) reports that North Korean-linked UNC5342 is using a method called EtherHiding to deliver malware and facilitate cryptocurrency theft by embedding encrypted payloads in smart contracts on Ethereum and BNB Smart Chain. The technique turns immutable contracts into resilient, hard-to-takedown command-and-control infrastructure. Initial lures include fake recruiter messages, poisoned npm packages and malicious GitHub repositories; a JavaScript downloader named JADESNOW fetches and decrypts subsequent backdoors such as INVISIBLEFERRET.

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