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resolvedcritical

Malicious code in yfinacne (PyPI)

Attacker distributed 900+ malicious packages via PyPI, including yfinacne, 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
  • yfinacneMalicious package distributed on PyPI

A malicious package named yfinacne was distributed on PyPI as part of a large-scale attack campaign. The attacker distributed over 900 malicious packages through the Python Package Index targeting developers and end users.

The malicious code in yfinacne and related packages installed browser extensions that performed clipboard manipulation and cryptocurrency wallet address replacement attacks. This allowed attackers to intercept and redirect cryptocurrency transactions by replacing legitimate wallet addresses with attacker-controlled addresses when users copied and pasted them.

The incident was identified and documented by the OpenSSF's malicious-packages repository (MAL-2023-2452), indicating coordinated detection and disclosure of the broader campaign.

Indicators of compromise

Packages
  • yfinacne

Remediation

  • Identify and remove yfinacne and any other suspicious packages from affected systems
  • Audit installed browser extensions and remove any unknown or suspicious extensions
  • Review cryptocurrency transaction history for any unauthorized address replacements
  • Update to clean Python environments and reinstall only trusted packages from verified sources
  • Monitor for signs of clipboard manipulation or unexpected browser behavior
  • Consider using package verification tools and dependency scanning to prevent installation of malicious packages

Sources

  1. GitHub Advisory GHSA-g8hj-3x3p-p498 · GitHub Advisory Database

Cite this entry

"Malicious code in yfinacne (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-yfinacne-pypi-1t6mxy

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