# MAL-2025-5113: Malicious code in fernetpy (PyPI)


- **Type:** Malicious package
- **Package:** `fernetpy` (PyPI)
- **Published:** 27 May 2025

## What is MAL-2025-5113?

MAL-2025-5113 is a malicious package in fernetpy, published on 27 May 2025. 

### Official description

If imported, the module starts a multi-stage infostealer, exfiltrating browser data as well as crypto wallets, and also attempts to monitor clipboard looking for crypto wallets addresses

---

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

Campaign: 2025-05-fernets

Reasons (based on the campaign):

 - infostealer

 - clipboard-stealing

 - exfiltration-generic

 - obfuscation

 - exfiltration-browser-data

 - exfiltration-crypto

 - typosquatting

## What should I do about MAL-2025-5113?

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-2025-5113 is a malicious package: fernetpy (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-2025-5113/ (Markdown: https://insights.sbomify.com/MAL-2025-5113/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2025-5113

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From sbomify Insights: https://insights.sbomify.com/MAL-2025-5113/
Summaries are generated and may contain mistakes; the official description above is the record.