# MAL-2025-6540: Malicious code in mainx (PyPI)


- **Type:** Malicious package
- **Package:** `mainx` (PyPI)
- **Published:** 24 Jun 2025

## What is MAL-2025-6540?

MAL-2025-6540 is a malicious package in mainx, published on 24 Jun 2025. 

### Official description

While described as educational package to simulate post-exploitation environment, the malware is active and once started, automatically attempts to exfiltrate sensitive data (credentials, cookies, etc.) and places a Discord implant. The remote target is hard coded in the code.

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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2025-06-mainx

Reasons (based on the campaign):

 - obfuscation

 - infostealer

 - files-exfiltration

 - exfiltration-credentials

 - exfiltration-browser-data

 - peristence-autorun

 - The package contains code to detect if it is running in a sandbox environment.

## What should I do about MAL-2025-6540?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2025-6540 is a malicious package: mainx (PyPI). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2025-6540/ (Markdown: https://insights.sbomify.com/MAL-2025-6540/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2025-6540

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From sbomify Insights: https://insights.sbomify.com/MAL-2025-6540/
Summaries are generated and may contain mistakes; the official description above is the record.