Which versions of clean-packager are malicious?

The following PyPI versions of clean-packager are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate clean-packager if I installed it?

clean-packager 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 clean-packager — how do I know if it already compromised me?

If clean-packager 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 clean-packager part of a known attack campaign?

Yes — clean-packager is associated with the RLMA-2025-00445, 2024-12-langer-updater, RLUA-2026-00195 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 clean-packager across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for clean-packager (version 1.0.0).

Part of a larger attack: 2024-12-langer-updater published 9 malicious packages. See the full campaign →

Malicious package

clean-packagerPyPI

Advisory published Dec 16, 2024Updated Mar 19, 2026

clean-packager is a confirmed malicious PyPI package (MAL-2025-907) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in clean-packager (PyPI)

MAL-2025-907

Immediate action

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

pip uninstall clean-packager

What this malware does

During installation, the package collects quite extensive information about the host and has no other purpose. To avoid detection, the real code is put in a ZIP archive and includes also some VM-detection techniques. The malicious code is activated via metaclass set for the "install" command class in setup.py

Over the time, techniques used in packages are slightly changing, including that some of marked packages don't have malicious part, but rather are used only for tests.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2024-12-langer-updater

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.
The package overrides the install command in setup.py to execute malicious code during installation.
exfiltration-env-variables
The package contains code to detect if it is running in a sandbox environment.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

20fe8f634a614a242ec00ad34ed515345e2f952b7501e561a526b0711b715b79

fbb097402e20ab66d3841e8177d2bbbcee99b4033d8614b12faa48ec325679b5

262c927312d80c4f09dc74bcc93a7036c67a0e3c831d802ce8cbebc21b37e4b5

3cb47eea62bccc5c5b14580f9462c8a81962689373dccdd136117ca63cba343d

a7bd70395f6968b313f4c86a51a00735f26e05b3d20f2a4e7e2b726b074b882c

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for clean-packager (version 1.0.0).
If you installed it — respond
clean-packager 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 clean-packager 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. clean-packager on PyPI has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-004452024-12-langer-updaterRLUA-2026-00195

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks clean-packager-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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