# MAL-2026-5271: Malicious code in goodoldtoulas (PyPI)


- **Type:** Malicious package
- **Package:** `goodoldtoulas` (PyPI)
- **Published:** 5 Jun 2026

## What is MAL-2026-5271?

MAL-2026-5271 is a malicious package in goodoldtoulas, published on 5 Jun 2026. 

### Official description

During `pip install goodoldtoulas`, setup.py invokes setup_helper() which downloads main.exe from https://cold-eu-par-1.gofile.io/download/web/deb39e07-da2d-4081-a86b-6380e555788c/main.exe (anonymous file host) into C:\MALWARE_DELETE and executes it via os.system('main.exe') (setup.py lines 6, 21, 33). The fetch is unpinned, has no hash verification, the destination is an opaque Windows binary, the host is not the publisher's domain, and the staging path name is self-incriminating. Any installer running pip install of this package on Windows fetches and executes an attacker-controlled binary at install time.

During installation, package attempts to download and run an executable imitating malicious activity.

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Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: 2026-06-goodoldtoulas

Reasons (based on the campaign):

 - The package overrides the install command in setup.py to execute malicious code during installation.

 - Downloads and executes a remote executable.

## What should I do about MAL-2026-5271?

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-2026-5271 is a malicious package: goodoldtoulas (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-2026-5271/ (Markdown: https://insights.sbomify.com/MAL-2026-5271/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5271

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-5271/
Summaries are generated and may contain mistakes; the official description above is the record.