Which versions of node-calculator-603e are malicious?

The following npm versions of node-calculator-603e are flagged malicious: 2.2.0, 2.2.1, 2.3.0, 4.0.0. Treat any of these as compromised.

How do I remediate node-calculator-603e if I installed it?

Remove node-calculator-603e 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 node-calculator-603e — how do I know if it already compromised me?

If node-calculator-603e 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 node-calculator-603e part of a known attack campaign?

Yes — node-calculator-603e is associated with the RLMA-2025-06412 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 node-calculator-603e across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for node-calculator-603e (4 malicious versions).

Malicious package

node-calculator-603enpm

Advisory published Dec 23, 2025Updated Jan 2, 2026

node-calculator-603e is a confirmed malicious npm package (MAL-2025-192831) that executes malicious code on install (malicious versions 2.2.0, 2.2.1, 2.3.0…). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in node-calculator-603e (npm)

MAL-2025-192831

Immediate action

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

npm uninstall node-calculator-603e

What this malware does

The package node-calculator-603e was found to contain malicious code.

Malicious versions

4 flagged

2.2.02.2.12.3.04.0.0

Indicators of compromise (SHA-256)

e70dfc249856de7b9ca8785caa2aa8532cf755d64b055cdd267dc7a48cb3e49e

55c44b3865cd161870b982402be851887051df13ed2fd57023ea4aeacd17c567

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for node-calculator-603e (4 malicious versions).
If you installed it — respond
Remove node-calculator-603e 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 node-calculator-603e 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. node-calculator-603e on npm has been identified as a malicious package (versions 2.2.0, 2.2.1, 2.3.0, 4.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-06412

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks node-calculator-603e-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

All malware advisories How O3 detects malware Vulnerability database