# MAL-2025-991: Malicious code in sysfunc (PyPI)


- **Type:** Malicious package
- **Package:** `sysfunc` (PyPI)
- **Published:** 26 Dec 2024

## What is MAL-2025-991?

MAL-2025-991 is a malicious package in sysfunc, published on 26 Dec 2024. 

### Official description

Importing the module starts downloading and executing an Infostealer targeting browsers' and Discord data

In first packages, there was a hidden line triggering downloading and running an infostealer

---

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

Campaign: 2024-12-syscontrol

Reasons (based on the campaign):

 - infostealer

 - obfuscation

 - action-hidden-in-lib-usage

 - infostealer:kiwi

 - exfiltration-browser-data

 - exfiltration-crypto

## What should I do about MAL-2025-991?

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-2025-991 is a malicious package: sysfunc (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-2025-991/ (Markdown: https://insights.sbomify.com/MAL-2025-991/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2025-991

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From sbomify Insights: https://insights.sbomify.com/MAL-2025-991/
Summaries are generated and may contain mistakes; the official description above is the record.