Which versions of rimuru-md are malicious?

The following npm versions of rimuru-md are flagged malicious: 3.3.0. Treat any of these as compromised.

How do I remediate rimuru-md if I installed it?

Remove rimuru-md 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 rimuru-md — how do I know if it already compromised me?

If rimuru-md 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.

How do I find rimuru-md across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for rimuru-md (version 3.3.0).

Malicious package

rimuru-mdnpm

Advisory published Oct 27, 2026Updated Nov 9, 2026

rimuru-md is a confirmed malicious npm package (MAL-2026-19009) that executes malicious code on install (malicious version 3.3.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in rimuru-md (npm)

MAL-2026-19009

Immediate action

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

npm uninstall rimuru-md

What this malware does

rimuru-md is a fork of the Baileys WhatsApp Web library that silently subscribes the installer's own WhatsApp account to WhatsApp Channels chosen by the publisher. When the socket connects, code in src/connection.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363407306241749@newsletter and the channel invite code(s) 0029Vb8dmsUElagkVPIw9X2P, 0029VbB37bgBfxoAmAlsgE0t, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

Malicious versions

1 flagged

3.3.0

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for rimuru-md (version 3.3.0).
If you installed it — respond
Remove rimuru-md 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 rimuru-md 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. rimuru-md on npm has been identified as a malicious package (version 3.3.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

References

Credits

CyberXYZ · finder

Detect & block this

O3 blocks rimuru-md-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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