Malicious code in yvper (PyPI)
Attacker distributed 900+ malicious packages via PyPI, including yvper, which infected local browsers with malicious extensions designed to manipulate clipboard and replace cryptocurrency wallet addresses.
- Disclosed
- Last updated
- Blast radius
- 900+ malicious packages distributed via PyPI
- Ecosystems
- Attack vectors
- Affected entities
- yvperPyPI package containing malicious code
A malicious package campaign distributed over 900 compromised packages via PyPI, with yvper being one of the affected packages. The malicious code installed browser extensions that performed clipboard manipulation and cryptocurrency wallet address replacement attacks.
The attack targeted users installing these packages from PyPI, compromising their local browser environments. The malicious extensions were designed to intercept and modify cryptocurrency wallet addresses in the clipboard, potentially redirecting funds to attacker-controlled addresses.
This incident was documented by the OpenSSF's malicious-packages repository (MAL-2023-2472) and identified by Checkmarx security researchers. The campaign represents a significant supply chain attack affecting the Python ecosystem.
Indicators of compromise
- Packages
- yvper
Remediation
- Immediately uninstall yvper and any other suspicious packages from the affected campaign
- Audit installed browser extensions and remove any unfamiliar or suspicious extensions
- Review cryptocurrency wallet addresses and transaction history for signs of manipulation
- Check clipboard history for modified wallet addresses
- Update all dependencies and use only verified packages from PyPI
- Monitor PyPI for similar malicious package distributions
- Use package verification tools and check package integrity before installation
Sources
- GitHub Advisory GHSA-qpgg-2jf8-jh25 · GitHub Advisory Database
Cite this entry
"Malicious code in yvper (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-yvper-pypi-37u9gd
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