The gs-uitk-object-utils npm package (version 9.9.11) includes malicious code embedded in its install script and main module. Upon installation or requiring the package, it collects sensitive host identifiers such as the OS username, hostname, and current working directory basename. These identifiers are combined with a hardcoded prefix 'goldman1' to form a subdomain under 'oob.sl4x0.xyz'. A DNS resolve4 query is then issued to this subdomain, effectively leaking host information to an attacker-controlled DNS server. The code responsible for this exfiltration is obfuscated by storing key strings as character code arrays decoded at runtime, hiding the malicious intent. The package masquerades as an object-utility library, which does not align with the observed network beaconing behavior.

This malicious package leaks sensitive host environment information (username, hostname, current directory) to an attacker-controlled domain during installation and module loading. This data exposure can aid attackers in reconnaissance and targeted attacks. There is no indication of further payload delivery or code execution beyond information leakage. No known exploits in the wild have been reported.

No official patch or remediation is currently documented. Users should immediately remove and avoid using gs-uitk-object-utils version 9.9.11. Verify dependencies to ensure this package is not included transitively. Monitor for updates or advisories from the package maintainers or npm registry. Consider using package integrity verification and supply chain security tools to detect similar malicious packages.