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supplychainattack.orgSupply chain attack incident catalog
resolvedcritical

Malicious code in yfinane (PyPI)

Attacker distributed 900+ malicious packages via PyPI, including yfinane, which infected local browsers with malicious extensions designed to manipulate clipboard and replace cryptocurrency wallet addresses.

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Disclosed
Last updated
Blast radius
900+ malicious packages distributed via PyPI
Ecosystems
PyPI
Attack vectors
Compromised package
Affected entities
  • yfinaneMalicious package distributed via PyPI

An attacker distributed over 900 malicious packages via the Python Package Index (PyPI), with yfinane being one of the identified affected packages. The malicious code was designed to install browser extensions on infected systems.

The installed extensions targeted cryptocurrency users by manipulating the clipboard and replacing legitimate cryptocurrency wallet addresses with attacker-controlled addresses. This attack vector allows theft of cryptocurrency transfers when users copy and paste wallet addresses.

The incident was documented by the OpenSSF's malicious-packages repository (MAL-2023-2455) and credited to Checkmarx for discovery. The attack represents a significant supply chain compromise affecting PyPI users who installed these packages.

Indicators of compromise

Packages
  • yfinane

Remediation

  • Immediately uninstall yfinane and any other suspicious packages from affected systems
  • Audit installed Python packages for unknown or suspicious entries
  • Review browser extensions for unauthorized or suspicious additions
  • Verify cryptocurrency wallet addresses independently before transfers
  • Monitor accounts for unauthorized cryptocurrency transactions
  • Update to patched versions if available or use alternative packages
  • Check PyPI for removal of malicious packages and review security advisories

Sources

  1. GitHub Advisory GHSA-rx4g-rmv4-3gjf · GitHub Advisory Database

Cite this entry

"Malicious code in yfinane (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-yfinane-pypi-t8mclz

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