Which versions of websign are malicious?

The following PyPI versions of websign are flagged malicious: 0.1.0. Treat any of these as compromised.

How do I remediate websign if I installed it?

websign 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 websign — how do I know if it already compromised me?

If websign 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 websign part of a known attack campaign?

Yes — websign is associated with the RLMA-2025-02631, 2025-04-alchemyrpcs, RLUA-2026-00925 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 websign across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for websign (version 0.1.0).

Part of a larger attack: 2025-04-alchemyrpcs published 10 malicious packages. See the full campaign →

Malicious package

websignPyPI

Advisory published Apr 27, 2025Updated Mar 19, 2026

websign is a confirmed malicious PyPI package (MAL-2025-4273) that steals credentials and exfiltrates sensitive data (malicious version 0.1.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in websign (PyPI)

MAL-2025-4273

Immediate action

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

pip uninstall websign

What this malware does

Package contains just a function to send out data. It (or a package sharing the same IoCs) is used in a malicious GitHub project to exfiltrate crypto currency private keys, e.g. https://github.com/taikoyaki/MegaEth-Auto-Bot/blob/772b4591daaa0b200d1bd1fd3be3d48b8433f084/cap/cap.py#L49

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

Campaign: 2025-04-alchemyrpcs

Reasons (based on the campaign):

crypto-related
The malicious code is intentionally included in a dependency of the package
exfiltration-crypto

Malicious versions

1 flagged

0.1.0

Indicators of compromise (SHA-256)

4a59dc6694a22280d53c39ce67f7230e3ebda36804168fcb82211273e324d878

6505d88c061e297b18178a440c9d55729c873a37a57a09115befe1fb6eb2a22e

25ea98e45fc0e99bfc731d77e2205bd14c901fc33ba6b8639b441b97739db0e2

1c2cd23b18ab4866022a4e611707833e084f18086971595f873b40013905455b

7b3df3514dc1c53965225b35305ca024f87fd90d1481ec4698f8023330d10283

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for websign (version 0.1.0).
If you installed it — respond
websign 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 websign 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. websign on PyPI has been identified as a malicious package (version 0.1.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-026312025-04-alchemyrpcsRLUA-2026-00925

References

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks websign-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

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