The malicious web3-eth-util package version 6.2.8 impersonates the legitimate ethereumjs-util package by copying its README, contributor list, and repository URL, but is published under a different name and ownership. The package's Node-targeted build injects a require call to 'assertcore', a third-party package resembling a typosquat of the standard 'assert' module, which is not present in the legitimate source code or browser build. This hidden dependency is loaded at runtime, enabling attacker-controlled code execution on any system that installs and imports this package. This is a dependency-chain dropper attack delivering malicious code via npm.

Any computer with web3-eth-util version 6.2.8 installed or running is considered fully compromised. The malicious code runs with full privileges in the Node.js environment, potentially exposing all secrets and keys stored on the system. Removal of the package does not guarantee full remediation as the attacker may have established persistent control or installed additional malware.

Remove the web3-eth-util package version 6.2.8 immediately. Rotate all secrets and keys from a secure, uncompromised environment. Because the package delivers attacker-controlled code with full privileges, assume full system compromise and conduct a thorough incident response. Patch status is not applicable as this is a malicious package impersonation rather than a vulnerability with a vendor fix. Avoid installing packages with suspicious metadata or unexpected dependencies.