Which versions of importlib-resource are malicious?

The following PyPI versions of importlib-resource are flagged malicious: 95.6. Treat any of these as compromised.

How do I remediate importlib-resource if I installed it?

importlib-resource is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed importlib-resource — how do I know if it already compromised me?

If importlib-resource was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is importlib-resource part of a known attack campaign?

Yes — importlib-resource is associated with the 2024-11-byted-dast campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find importlib-resource across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for importlib-resource (version 95.6).

Part of a larger attack: 2024-11-byted-dast published 183 malicious packages. See the full campaign →

Malicious package

importlib-resourcePyPI

Advisory published Nov 6, 2024Updated Dec 12, 2025

importlib-resource is a confirmed malicious PyPI package (MAL-2024-10737) that steals credentials and exfiltrates sensitive data (malicious version 95.6). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in importlib-resource (PyPI)

MAL-2024-10737

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

pip uninstall importlib-resource

What this malware does

A campaign of probably pentest packages flooding PYPI. Installing the package or importing the module triggers reporting basic info like hostname, path and the username to the package author. There is no other purpose of the package.

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: 2024-11-byted-dast

Reasons (based on the campaign):

The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.
typosquatting
dependency-confusion

The OpenSSF Package Analysis project identified 'importlib-resource' @ 95.6 (pypi) as malicious.

It is considered malicious because:

The package communicates with a domain associated with malicious activity.

Malicious versions

1 flagged

95.6

Indicators of compromise (SHA-256)

2088fd86875cb6a00ffdaae2e324f3b93e22b289fcca046ce26bd96cda8dfdc2

278d41daef43491c49e1d12623146ed12d9be34df180e0a50c9bff78d3337d59

0fd6066b0541bd12a7a24cd00cf0cebdc0d82832ae6ead0c90db2589bf50e152

f5aead36ba33543bd93336e52e3b17515f9fb0adbdfc3459e107f6e3af8f07a7

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for importlib-resource (version 95.6).
If you installed it — respond
importlib-resource is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If importlib-resource was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. importlib-resource on PyPI has been identified as a malicious package (version 95.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2024-11-byted-dast

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)
OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks importlib-resource-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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