# MAL-2025-191663: Malicious code in syschecker (PyPI)


- **Type:** Malicious package
- **Package:** `syschecker` (PyPI)
- **Published:** 26 Oct 2025

## What is MAL-2025-191663?

MAL-2025-191663 is a malicious package in syschecker, published on 26 Oct 2025. 

### Official description

Package downloads and runs an obfuscated bat file, which executes malicious activity according to VirusTotal results.

---

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

Campaign: 2025-10-windowsrequir

Reasons (based on the campaign):

 - impersonation

 - Downloads and executes a remote malicious script.

 - malware

## What should I do about MAL-2025-191663?

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-2025-191663 is a malicious package: syschecker (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-2025-191663/ (Markdown: https://insights.sbomify.com/MAL-2025-191663/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2025-191663

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From sbomify Insights: https://insights.sbomify.com/MAL-2025-191663/
Summaries are generated and may contain mistakes; the official description above is the record.