Which versions of web3yrpcs are malicious?

The following PyPI versions of web3yrpcs are flagged malicious: 1.1.2. Treat any of these as compromised.

How do I remediate web3yrpcs if I installed it?

web3yrpcs 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 web3yrpcs — how do I know if it already compromised me?

If web3yrpcs 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 web3yrpcs part of a known attack campaign?

Yes — web3yrpcs is associated with the RLMA-2025-02630, 2025-04-alchemyrpcs, RLUA-2026-00923 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 web3yrpcs across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for web3yrpcs (version 1.1.2).

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

Malicious package

web3yrpcsPyPI

Advisory published Apr 27, 2025Updated Mar 19, 2026

web3yrpcs is a confirmed malicious PyPI package (MAL-2025-4272) that steals credentials and exfiltrates sensitive data (malicious version 1.1.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in web3yrpcs (PyPI)

MAL-2025-4272

Immediate action

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

pip uninstall web3yrpcs

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

1.1.2

Indicators of compromise (SHA-256)

02407a1ef9536438cbb08658bb0328e4ca6657a6214ebd329bc8b56b57c058c1

defde073e7bd3ba063a00577964c26c6256d20a9221cc4de5f675598618e5062

171ec4f4bbfb34688348ecdda292249487574c8fb28caf8467c0bbafb1563cb7

6cae6c04abcfa97bd481e2ea2bb7fab7613522da692eab369c4af589addbf971

b6f73f2a0ef14631157a06327e68782be871d8e66e3b2bd4ca0262dc50b6c557

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for web3yrpcs (version 1.1.2).
If you installed it — respond
web3yrpcs 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 web3yrpcs 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. web3yrpcs on PyPI has been identified as a malicious package (version 1.1.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-026302025-04-alchemyrpcsRLUA-2026-00923

References

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks web3yrpcs-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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