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containedcritical

Malicious code in xxx-bale (PyPI)

The PyPI package xxx-bale contained malicious code designed to download and execute remotely stored malware with persistence mechanisms. The malicious payload requires a separate trigger to activate.

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Disclosed
Last updated
Blast radius
All users who installed the malicious xxx-bale package from PyPI
Ecosystems
PyPI
Attack vectors
Compromised package
Threat actor
2025 07 Cas Base Campaign
Affected entities
  • xxx-balePyPI package containing malicious code

The xxx-bale package on PyPI was found to contain malicious code as part of the 2025-07-cas-base campaign. The package includes functionality to download and execute a remote executable and establish persistence on the infected system.\n\nThe malicious code is not automatically triggered upon installation; instead, it requires a separate trigger mechanism to activate the payload. This design pattern is consistent with staged malware delivery tactics.\n\nThe malicious package was identified and credited to the OpenSSF's malicious-packages repository (MAL-2026-3428). The incident was disclosed on 2026-07-21 via GitHub Security Advisory GHSA-2qhr-vm43-8f4v.

Indicators of compromise

Packages
  • xxx-bale

Remediation

  • Remove the xxx-bale package immediately from all systems where it was installed
  • Audit systems that installed xxx-bale for signs of malware execution or persistence mechanisms
  • Review network logs for suspicious outbound connections to remote executable servers
  • Regenerate any credentials or sensitive data that may have been exposed on affected systems
  • Monitor for indicators of compromise related to the 2025-07-cas-base campaign

Sources

  1. GitHub Advisory GHSA-2qhr-vm43-8f4v · GitHub Advisory Database

Cite this entry

"Malicious code in xxx-bale (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-xxx-bale-pypi-3ym4fe

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