# MAL-2025-3440: Malicious code in codeoptimizer (PyPI)


- **Type:** Malicious package
- **Package:** `codeoptimizer` (PyPI)
- **Published:** 23 Mar 2025

## What is MAL-2025-3440?

MAL-2025-3440 is a malicious package in codeoptimizer, published on 23 Mar 2025. 

### Official description

On importing the module, there is an automated start of a Telegram bot capable of exfiltrating passwords from browsers, executing arbitrary commands and so on. While the description states it's a monitoring tool, the automated start, capabilities targeting secret values suggest malicious intentions.

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

Campaign: 2025-03-yolov8mini

Reasons (based on the campaign):

 - infostealer

 - exfiltration-generic

 - dependency-confusion

 - exfiltration-browser-data

 - The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.

## What should I do about MAL-2025-3440?

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-2025-3440 is a malicious package: codeoptimizer (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-2025-3440/ (Markdown: https://insights.sbomify.com/MAL-2025-3440/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2025-3440

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From sbomify Insights: https://insights.sbomify.com/MAL-2025-3440/
Summaries are generated and may contain mistakes; the official description above is the record.