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resolvedcritical

Malicious code in yfinnce (PyPI)

Attacker distributed 900+ malicious packages via PyPI, including yfinnce, which infected local browsers with a malicious extension designed to manipulate the clipboard and replace cryptocurrency wallet addresses. The incident was identified and documented by the OpenSSF malicious packages project.

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Disclosed
Last updated
Blast radius
900+ malicious packages distributed via PyPI; local browser infection and cryptocurrency wallet address manipulation
Ecosystems
PyPI
Attack vectors
Compromised package
Affected entities
  • yfinncePyPI package containing malicious code

An attacker distributed over 900 malicious packages through the Python Package Index (PyPI), with yfinnce being one of the identified packages. These packages contained malicious code that targeted end-user systems.\n\nThe malicious packages were designed to install browser extensions that performed clipboard manipulation and cryptocurrency wallet address replacement attacks. This attack vector is particularly dangerous as it can silently redirect cryptocurrency transactions to attacker-controlled addresses.\n\nThe incident was identified and documented by the OpenSSF's malicious packages project, which maintains a public record of known malicious packages across package ecosystems. The attack demonstrates the risk of supply chain compromise through package repositories.

Indicators of compromise

Packages
  • yfinnce

Remediation

  • Remove and uninstall the yfinnce package and any other packages from the malicious campaign
  • Audit system for installed browser extensions, particularly those installed without explicit user action
  • Review cryptocurrency wallet transaction history for unauthorized address changes
  • Check clipboard history for suspicious modifications
  • Update to clean versions of legitimate packages if yfinnce was a typosquat or dependency
  • Monitor systems for signs of browser extension installation or clipboard manipulation

Sources

  1. GitHub Advisory GHSA-rc32-pp7j-5j6r · GitHub Advisory Database

Cite this entry

"Malicious code in yfinnce (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-yfinnce-pypi-rsqv6d

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