Malicious Code Injection in modirai-igno-jiamugu: A Threat to npm Ecosystem
Summary
MAL-2025-160666: Malicious code in modirai-igno-jiamugu (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
modirai-igno-jiamugu is an npm package that has been identified as part of a malicious campaign targeting the npm registry. This package is associated with the tea.xyz token reward initiative, which aims to inflate developer reputation scores through the automatic generation and publication of derivative packages. The package's functionality has been compromised, making it a vector for malicious activities.
Vulnerability Detail
The vulnerability in modirai-igno-jiamugu stems from its malicious code that modifies the package.json file to remove private flags and alters version numbers. It generates random package names, often themed around Indonesian culture, and continuously republishes these variants to pollute the npm registry. This behavior not only affects the integrity of the npm ecosystem but also poses risks to developers who may unknowingly use these compromised packages.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall modirai-igno-jiamuguIf 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 modirai-igno-jiamugu package until a secure version is released. Additionally, consider using alternative packages that provide similar functionality without the associated risks.
Conclusion
The modirai-igno-jiamugu package poses a significant threat to the npm ecosystem due to its malicious code that modifies package metadata and repopulates the registry with compromised packages. It is essential for developers to remain vigilant, update their dependencies, and utilize tools like Vulert to monitor for vulnerabilities.
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FAQ
modirai-igno-jiamugu is an npm package that has been identified as part of a malicious campaign to inflate developer reputation scores through the automatic generation of derivative packages.
The vulnerability can lead to the inclusion of malicious code in your project, potentially compromising its security and integrity.
If you have used the modirai-igno-jiamugu package, it is crucial to remove it from your project and update to a secure version or an alternative package.
You can use tools like Vulert, which monitors your package-lock.json file for open-source vulnerabilities in real-time without requiring code access or installation.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
