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resolvedcritical

Malicious code in adhttp (PyPI)

The adhttp 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 malware executed spyware and information-stealing functionality.

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

The adhttp 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 repositories.\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, which tracks confirmed malicious package submissions.\n\nThe package has been identified with the OpenSSF malicious package identifier MAL-2023-2485, indicating it was cataloged as part of their malicious package tracking efforts.

Indicators of compromise

Packages
  • adhttp

Remediation

  • Remove adhttp from all environments and dependency lists
  • Audit systems that installed adhttp for signs of compromise, including unauthorized network connections and data exfiltration
  • Review and rotate any credentials or sensitive information that may have been exposed
  • Monitor for indicators of compromise related to spyware and information-stealing malware
  • Check PyPI and NPM repositories for other packages from the same campaign and remove them

Sources

  1. GitHub Advisory GHSA-jr55-mmq9-whqv · GitHub Advisory Database

Cite this entry

"Malicious code in adhttp (PyPI)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 21, 2026; last updated July 21, 2026. https://supplychainattack.org/incident/malicious-code-in-adhttp-pypi-1m1w3i

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