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resolvedcritical

Malicious code in adcraft (PyPI)

The adcraft package on PyPI contained malicious code as part of a campaign by EsqueleSquad group that published nearly 6000 malicious packages across PyPI and NPM. The malicious code executed spyware and information-stealing malware.

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Disclosed
Last updated
Blast radius
Potentially thousands of installations; part of a large-scale malicious package campaign affecting both PyPI and NPM ecosystems.
Ecosystems
PyPI
Attack vectors
Compromised package
Threat actor
Esquelesquad
Affected entities
  • adcraftPyPI package containing malicious code

The adcraft package on PyPI was identified as containing malicious code. This package was part of a large-scale coordinated campaign by the EsqueleSquad group, which published nearly 6000 malicious packages across both PyPI and NPM ecosystems.\n\nThe malicious code in these packages was designed to execute spyware and information-stealing malware on affected systems. The incident was documented and credited to the OpenSSF's malicious-packages repository, with the specific advisory identified as MAL-2023-2480.\n\nAny system that installed the adcraft package from PyPI during the period it was available would have been at risk of compromise.

Indicators of compromise

Packages
  • adcraft

Remediation

  • Immediately uninstall the adcraft package from all systems
  • Audit systems that previously installed adcraft for signs of compromise, including unauthorized network connections and data exfiltration
  • Review and revoke any credentials or sensitive information that may have been exposed
  • Monitor affected systems for persistence mechanisms or secondary malware
  • Update dependency management tools to block or alert on known malicious packages from the OpenSSF malicious-packages database

Sources

  1. GitHub Advisory GHSA-f2vv-jgq5-cfw5 · GitHub Advisory Database

Cite this entry

"Malicious code in adcraft (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-adcraft-pypi-flq2nn

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