# MAL-2026-4829: Malicious code in quatres (PyPI)


- **Type:** Malicious package
- **Package:** `quatres` (PyPI)
- **Published:** 27 May 2026

## What is MAL-2026-4829?

MAL-2026-4829 is a malicious package in quatres, published on 27 May 2026. 

### Official description

During import, the hidden code downloads and executes the second-stage code. After performing anti-analysis checks, it downloads a malicious executable and ensures its persistence.

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

Campaign: 2026-05-helu

Reasons (based on the campaign):

 - obfuscation

 - Downloads and executes a remote malicious script.

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

 - Downloads and executes a remote executable.

 - malware

 - persistence

 - covering-tracks

## What should I do about MAL-2026-4829?

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-2026-4829 is a malicious package: quatres (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-2026-4829/ (Markdown: https://insights.sbomify.com/MAL-2026-4829/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-4829

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-4829/
Summaries are generated and may contain mistakes; the official description above is the record.