Which versions of certufi are malicious?

The following PyPI versions of certufi are flagged malicious: 2022.12.7. Treat any of these as compromised.

How do I remediate certufi if I installed it?

Remove certufi from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed certufi — how do I know if it already compromised me?

If certufi 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 certufi part of a known attack campaign?

Yes — certufi is associated with the RLMA-2025-04128 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 certufi across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for certufi (version 2022.12.7).

Malicious package

certufiPyPI

certufi is a confirmed malicious PyPI package (MAL-2025-41637) that executes malicious code on install (malicious version 2022.12.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in certufi (PyPI)

MAL-2025-41637

Immediate action

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

pip uninstall certufi

Malicious versions

1 flagged

2022.12.7

Indicators of compromise (SHA-256)

5a984dfd8dc81dcc3aaffcaf52d1f35b40d4c9dcb0031a0289739088d5698d43

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for certufi (version 2022.12.7).
If you installed it — respond
Remove certufi from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If certufi 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. certufi on PyPI has been identified as a malicious package (version 2022.12.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-04128

Credits

ReversingLabs · finder

Detect & block this

O3 blocks certufi-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

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