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supplychainattack.orgSupply chain attack incident catalog
resolvedcritical

Malicious code in yfinanec (PyPI)

Attacker distributed 900+ malicious packages via PyPI, including yfinanec, which installed malicious browser extensions designed to manipulate clipboard contents and replace cryptocurrency wallet addresses. The campaign was identified and documented by the OpenSSF malicious-packages project.

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Disclosed
Last updated
Blast radius
900+ malicious packages distributed; targets local browsers and cryptocurrency wallets
Ecosystems
PyPI
Attack vectors
Compromised package
Affected entities
  • yfinanecPyPI package containing malicious code

An attacker distributed over 900 malicious packages through the Python Package Index (PyPI), with yfinanec being one of the identified packages. These packages contained code that installed malicious browser extensions on infected systems.\n\nThe malicious extensions were designed to intercept and manipulate clipboard data, specifically targeting cryptocurrency wallet addresses. When users copied wallet addresses, the extension would replace them with attacker-controlled addresses, enabling theft of cryptocurrency transfers.\n\nThe incident was identified and documented by the OpenSSF's malicious-packages project (reference MAL-2023-2456). The packages have since been removed from PyPI.

Indicators of compromise

Packages
  • yfinanec

Remediation

  • Remove yfinanec and any other suspicious packages from affected systems
  • Audit pip package installation history for the 900+ malicious packages identified in the OpenSSF malicious-packages repository
  • Uninstall any malicious browser extensions from affected browsers
  • Review recent cryptocurrency transactions for signs of address manipulation
  • Use package verification tools and check PyPI advisories before installing packages
  • Monitor clipboard activity and use hardware wallets or verified address verification methods for cryptocurrency transfers

Sources

  1. GitHub Advisory GHSA-796h-8x9j-2cwg · GitHub Advisory Database

Cite this entry

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

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