MalwarePublished 5 Aug 2026

gs-uitk-object-utils (npm) · Malicious Code

Affects gs-uitk-object-utilsSource GCVE Database

Malicious package : remove gs-uitk-object-utils and rotate any secrets on hosts that installed it.

Data as of 5 Aug 2026, 16:50 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12791

What to do

Remove gs-uitk-object-utils from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmgs-uitk-object-utils	Affected =9.9.11	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

The npm package gs-uitk-object-utils version 9.9.11 contains malicious code that exfiltrates host environment information during installation and when required. It reads the OS username, hostname, and current working directory, then encodes and sends this data via DNS queries to an attacker-controlled domain. This behavior is concealed through obfuscated code and is inconsistent with the package's purported utility functionality.

Impact

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.

Defensive guidance

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.

Summary

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.

References

npmjs.com/package/gs-uitk-object-utils/v/9.9.11 (opens in a new tab)

Community reviews

Loading reviews…

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Aug 2026, 16:50 UTC

Technical details

References

Community reviews