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supplychainattack.orgSupply chain attack incident catalog
resolvedcritical

Malicious code in aaiohttp (PyPI)

Attacker distributed 900+ malicious packages via PyPI, including aaiohttp, 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
  • aaiohttpMalicious package distributed on PyPI

An attacker distributed over 900 malicious packages via the Python Package Index (PyPI), including a package named aaiohttp. These packages contained malicious code that targeted end-user systems.\n\nThe malicious payload installed browser extensions that performed clipboard manipulation and cryptocurrency wallet address replacement attacks. This attack vector allowed attackers to intercept and modify cryptocurrency transactions by replacing legitimate wallet addresses with attacker-controlled addresses.\n\nThe incident was identified and documented by the OpenSSF's malicious-packages repository (MAL-2023-1574). The packages have since been removed from PyPI.

Indicators of compromise

Packages
  • aaiohttp

Remediation

  • Remove aaiohttp and any other suspicious packages from affected systems
  • Audit installed Python packages for unexpected or unfamiliar names
  • Check browser extensions for unauthorized or suspicious additions
  • Review cryptocurrency transaction history for signs of address manipulation
  • Use package verification tools and check PyPI package metadata before installation
  • Monitor for similar typosquatting or malicious package distribution campaigns

Sources

  1. GitHub Advisory GHSA-48qh-9gx4-j472 · GitHub Advisory Database

Cite this entry

"Malicious code in aaiohttp (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-aaiohttp-pypi-wvs87x

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