Malicious Code Injection in utomo-kue84-ruro: A Threat to npm Packages

utomo-kue84-ruro Updated 18 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-110277: Malicious code in utomo-kue84-ruro (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The package 'utomo-kue84-ruro' is part of a series of npm packages that emerged during the tea.xyz token reward campaign. These packages are designed to manipulate the npm registry by automatically generating and publishing derivative packages with randomized names. The primary function of this package is to inflate developer reputation scores in exchange for token rewards, but it has been compromised to include malicious code.

Vulnerability Detail

The vulnerability in 'utomo-kue84-ruro' originates from its association with the tea.xyz token reward campaign. It includes malicious scripts that modify the package.json file to remove private flags, alter version numbers, and generate random package names. This behavior leads to the continuous republishing of variants, polluting the npm registry and potentially compromising other packages. The malicious payload can affect developers' reputations and the integrity of the npm ecosystem.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall utomo-kue84-ruro

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

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Workaround

As a temporary workaround, you can avoid using the 'utomo-kue84-ruro' package and look for alternative packages that provide similar functionality without the associated risks. Additionally, consider using tools like Vulert to monitor your project for vulnerabilities. You can check if your application is affected by this vulnerability using the Vulert playground at https://vulert.com/scanner without any signup.

Conclusion

The 'utomo-kue84-ruro' package poses a significant threat due to its malicious code designed to manipulate the npm registry. Developers are urged to remove this package from their projects and utilize tools like Vulert to monitor for vulnerabilities. Staying informed and proactive is crucial in maintaining the security of your software.

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FAQ

The main issue is that it contains malicious code that modifies package.json files and floods the npm registry with derivative packages.

You can check your package-lock.json file or use tools like Vulert to scan for vulnerabilities in your project.

Using this package can lead to reputation damage for developers and compromise the integrity of the npm ecosystem.

Regularly monitor your dependencies using tools like Vulert and stay updated on security advisories related to the packages you use.

Immediately uninstall the package using 'npm uninstall utomo-kue84-ruro' and check for any updates or patches.

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How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall utomo-kue84-ruro

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

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