MAL-2026-14290 Malicious code in anhn-cli (npm)

bin/install/install.js appends a heavily obfuscated top-level IIFE (obfuscator.io-style rotated string array _0x240a/_0x4963 with arithmetic index decoding) after the benign install() helper. The payload queries public Ethereum RPCs and etherscan.io for transactions from the hardcoded sender address 0xa322E5f3…, decodes the transaction to field as an IPv4 address, fetches an XOR-encrypted body from that host, and executes it via eval(prefix+xor(body)) and a detached spawn('node', ['-e',...], {detached:true}).unref(). The package's main entry (bin/index.js) unconditionally requires./install/install, so the IIFE runs whenever the package is required or the CLI is invoked. The attacker controls the fetched payload by publishing new Ethereum transactions from the sender address; there is no version pinning, no signature check, and the destination host rotates on-chain. Decoded strings inside the string array include eth_getBlockByNumber, etherscan.io, eval, and spawn.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.