Which versions of node-calculator-b549 are malicious?

The following npm versions of node-calculator-b549 are flagged malicious: 2.2.3, 2.2.4, 2.2.5. Treat any of these as compromised.

How do I remediate node-calculator-b549 if I installed it?

Remove node-calculator-b549 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-b549 — how do I know if it already compromised me?

If node-calculator-b549 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-b549 part of a known attack campaign?

Yes — node-calculator-b549 is associated with the RLMA-2025-06424 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-b549 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for node-calculator-b549 (3 malicious versions).

Malicious package

node-calculator-b549npm

Advisory published Nov 17, 2025Updated Dec 24, 2025

node-calculator-b549 is a confirmed malicious npm package (MAL-2025-190538) that executes malicious code on install (malicious versions 2.2.3, 2.2.4, 2.2.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in node-calculator-b549 (npm)

MAL-2025-190538

Immediate action

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

npm uninstall node-calculator-b549

What this malware does

The package node-calculator-b549 was found to contain malicious code.

Malicious versions

3 flagged

2.2.32.2.42.2.5

Indicators of compromise (SHA-256)

9f6998e40655502ee87b114336440ce7dda9b63892957467df8866506a1c671a

4aeb8ef97af5a84455c33b94f545b2bd1cc238b98cd4dbd30595e525789d39e6

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for node-calculator-b549 (3 malicious versions).
If you installed it — respond
Remove node-calculator-b549 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-b549 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-b549 on npm has been identified as a malicious package (versions 2.2.3, 2.2.4, 2.2.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-06424

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks node-calculator-b549-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