Which versions of noway-back are malicious?

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

How do I remediate noway-back if I installed it?

noway-back 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 noway-back — how do I know if it already compromised me?

If noway-back 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 noway-back part of a known attack campaign?

Yes — noway-back is associated with the RLMA-2025-00488, 2024-12-langer-updater, RLUA-2026-00562 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 noway-back across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for noway-back (version 1.0.0).

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

Malicious package

noway-backPyPI

Advisory published Dec 16, 2024Updated Mar 19, 2026

noway-back is a confirmed malicious PyPI package (MAL-2025-947) 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 noway-back (PyPI)

MAL-2025-947

Immediate action

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

pip uninstall noway-back

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)

afdb5e6dc7b6d22e57b74cb58bb5bc308c6932af9567fc977a7abf9320ea8d7d

d50b7ca0e39fedefe649f9c13a5723c3aac5db4cc3f4b57922b64a22ecce43fd

ddfd888bb0cff1ee81f07dbdfce95081afa43d43a18f8a0417b3724337c2e287

3d694c7e858a28c7100da5e6f03a41fe9d96946b3e142bbd09c8d8aaf03cf32a

39778044601429de0385453f1262cd2ed3f43d4b0c294609977e0680402ec25d

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for noway-back (version 1.0.0).
If you installed it — respond
noway-back 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 noway-back 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. noway-back 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-2025-004882024-12-langer-updaterRLUA-2026-00562

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks noway-back-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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