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resolvedcritical

Malicious code in adurl (PyPI)

The adurl package on PyPI was identified as malicious, containing spyware and information-stealing malware. It was part of a campaign by EsqueleSquad group that published nearly 6,000 malicious packages across PyPI and NPM.

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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
  • adurlPyPI package containing malicious code

The adurl package on PyPI was identified as containing malicious code designed to execute spyware and information-stealing malware. This package was part of a large-scale coordinated campaign by the EsqueleSquad group.

The EsqueleSquad group published nearly 6,000 malicious packages across both PyPI and NPM ecosystems as part of this campaign. The malicious adurl package was documented and tracked by the OpenSSF's malicious-packages repository (MAL-2023-2506).

Users who installed the adurl package from PyPI may have been exposed to spyware and information-stealing capabilities. The incident was identified and documented through security research and coordinated disclosure efforts.

Indicators of compromise

Packages
  • adurl

Remediation

  • Remove the adurl package from all environments where it was installed
  • Audit systems that may have installed adurl for signs of compromise or data exfiltration
  • Review PyPI package dependencies to identify and remove any other packages from the EsqueleSquad malicious campaign
  • Monitor for suspicious network activity or unauthorized data access on affected systems
  • Consider using package verification and scanning tools to detect malicious packages before installation

Sources

  1. GitHub Advisory GHSA-xm33-6p9v-23jp · GitHub Advisory Database

Cite this entry

"Malicious code in adurl (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-adurl-pypi-yg7ado

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