# MAL-2025-191533: Malicious code in spellcheckers (PyPI)


- **Type:** Malicious package
- **Package:** `spellcheckers` (PyPI)
- **Published:** 15 Nov 2025

## What is MAL-2025-191533?

MAL-2025-191533 is a malicious package in spellcheckers, published on 15 Nov 2025. 

### Official description

This package is malicious and typosquating the legitimate pyspellchecker library.
This package will deploy a remote-access trojan that allows the attacker full
control of the victim's host.

Package contains hidden code that is effectively run during importing and downloads second stage code. Then, a process running in background periodically connects to a remote host and waits for next code to execute

---

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

Campaign: 2025-11-spellcheckers

Reasons (based on the campaign):

 - obfuscation

 - Downloads and executes a remote malicious script.

 - 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-2025-191533?

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-2025-191533 is a malicious package: spellcheckers (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-2025-191533/ (Markdown: https://insights.sbomify.com/MAL-2025-191533/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2025-191533

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From sbomify Insights: https://insights.sbomify.com/MAL-2025-191533/
Summaries are generated and may contain mistakes; the official description above is the record.