MALICIOUS (1) package from Python Package Index.

1. The campaign has clearly malicious intent, like infostealers.

cas-base

Affected versions: (1) 1.5.2, 1.5.3, 1.5.5, 1.5.6, 1.5.7, 1.5.8, 1.5.9, 1.6.0, 1.6.1, 1.6.2, 1.6.3, 1.6.5, 1.6.6, 1.6.9, 1.7.1

1. Version numbers are usually added automatically. In most cases, the packages listed here were created only to distribute malicious code.

The package contains code to install remotely stored malware and ensure its persistence. The code is not triggered automatically; it requires a separate trigger.

Originally, cas-base was detected in 2025-07 with an unclear payload. Later it got updated to a clearly malicious payload

Campaign data

Campaign information may not always be 100% accurate for every related package.

Campaign description

The package contains code to install remotely stored malware and ensure its persistence. The code is not triggered automatically; it requires a separate trigger.

See more details on the campaign page.

malware

Package contains or installs known malware.

persistence

Campaign targets persistence.

remote_executable

Downloads and executes a remote executable.

Look up in other services

• Check metadata in pypi-data project (1)
• Search for the package in deps.dev(2)
• Search for the package in socket.dev (3)
• Search for the package in secure.software (4)
• Search for the package in Snyk Advisor (5)

1. May not be available. See more in pypi-json-data repository.
2. Open Source Insights project, provided by Google.
3. Service from Socket.dev, a cybersecurity company.
4. Spectra Assure Community, a service from ReversingLabs, a cybersecurity company.
5. Service from Snyk, a cybersecurity company.