MAL-2025-6541 Malicious code in malimalo (PyPI)
Malicious package
Published
MAL-2025-6541 is a malicious package: malimalo (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-2025-6541/ (Markdown: https://insights.sbomify.com/MAL-2025-6541/index.md)
- Package
- malimalo
- Registry
- PyPI
What is MAL-2025-6541?
MAL-2025-6541 is a malicious package in malimalo, published on 4 Jul 2025.
Official description
The only goal of the package is to execute a webhook or a suspicious file during installation.
Closely related to 2025-07-0x9xnx - created after previous packages were quarantined, similar names, similar usage, but no clearly malicious parts.
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: 2025-07-malimalo
Reasons (based on the campaign):
- The package overrides the install command in setup.py to execute malicious code during installation.
What should I do about MAL-2025-6541?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.