MAL-2025-6549 Malicious code in memtools (PyPI)
Malicious package
Published
MAL-2025-6549 is a malicious package: memtools (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-2025-6549/ (Markdown: https://insights.sbomify.com/MAL-2025-6549/index.md)
- Package
- memtools
- Registry
- PyPI
What is MAL-2025-6549?
MAL-2025-6549 is a malicious package in memtools, published on 16 Jul 2025.
Official description
Installing the package triggers a code that looks like downloading a picture, but in fact downloads and starts an executable with malware. Note that file supplied from the URL differs depending on the presence of the special header
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2025-07-memlib
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.
malware
What should I do about MAL-2025-6549?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.