Malicious code in xxoo-bale (PyPI)
The PyPI package xxoo-bale contained malicious code designed to download and execute remotely stored malware with persistence mechanisms. The malicious payload required a separate trigger to activate.
- Disclosed
- Last updated
- Blast radius
- All users who installed the malicious xxoo-bale package from PyPI
- Ecosystems
- Attack vectors
- Threat actor
- Affected entities
- xxoo-balePyPI package containing malicious code
The xxoo-bale package published on PyPI contained embedded malicious code as part of campaign 2025-07-cas-base. The code was designed to download and execute a remote executable and establish persistence on affected systems.\n\nThe malware did not execute automatically upon installation; instead, it required an external trigger to activate. This suggests the attack was targeted or relied on specific conditions to deploy the payload.\n\nThe malicious package was identified and credited to the OpenSSF's malicious-packages repository (MAL-2026-3425). The package has been removed from PyPI following disclosure.
Indicators of compromise
- Packages
- xxoo-bale
Remediation
- Remove xxoo-bale from all environments immediately
- Audit systems that installed xxoo-bale for signs of malware execution or persistence mechanisms
- Review system logs for suspicious remote executable downloads or execution
- Scan affected systems with updated antimalware tools
- Reset credentials on any systems that may have been compromised
- Monitor for indicators of compromise related to campaign 2025-07-cas-base
Sources
- GitHub Advisory GHSA-46v8-7x99-g2w6 · GitHub Advisory Database
Cite this entry
"Malicious code in xxoo-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-xxoo-bale-pypi-15pxxz
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