MAL-2025-991 Malicious code in sysfunc (PyPI)
Malicious package
Published
MAL-2025-991 is a malicious package: sysfunc (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-2025-991/ (Markdown: https://insights.sbomify.com/MAL-2025-991/index.md)
- Package
- sysfunc
- Registry
- PyPI
What is MAL-2025-991?
MAL-2025-991 is a malicious package in sysfunc, published on 26 Dec 2024.
Official description
Importing the module starts downloading and executing an Infostealer targeting browsers' and Discord data
In first packages, there was a hidden line triggering downloading and running an infostealer
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2024-12-syscontrol
Reasons (based on the campaign):
infostealer
obfuscation
action-hidden-in-lib-usage
infostealer:kiwi
exfiltration-browser-data
exfiltration-crypto
What should I do about MAL-2025-991?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.