Hackers exploit Ethereum smart contracts to spread malware
Researchers discovered two NPM packages that used blockchain queries to fetch malicious URLs, bypassing traditional scans by appearing as normal blockchain traffic.
Cybersecurity researchers have uncovered a new method hackers use to deliver malware, which hides malicious commands inside Ethereum smart contracts. ReversingLabs identified two compromised NPM packages on the popular Node Package Manager repository.
The packages, named ‘colortoolsv2’ and ‘mimelib2,’ were uploaded in July and used blockchain queries to fetch URLs that delivered downloader malware. The contracts hid command and control addresses, letting attackers evade scans by making blockchain traffic look legitimate.
Researchers say the approach marks a shift in tactics. While the Lazarus Group previously leveraged Ethereum smart contracts, the novel element uses them as hosts for malicious URLs. Analysts warn that open-source repositories face increasingly sophisticated evasion techniques.
The malicious packages formed part of a broader deception campaign involving fake GitHub repositories posing as cryptocurrency trading bots. With fabricated commits, fake user accounts, and professional-looking documentation, attackers built convincing projects to trick developers.
Experts note that similar campaigns have also targeted Solana and Bitcoin-related libraries, signalling a broader trend in evolving threats.
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