Which versions of node-calculator-b57e are malicious?

The following npm versions of node-calculator-b57e are flagged malicious: 2.2.3. Treat any of these as compromised.

How do I remediate node-calculator-b57e if I installed it?

Remove node-calculator-b57e 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-b57e — how do I know if it already compromised me?

If node-calculator-b57e 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-b57e part of a known attack campaign?

Yes — node-calculator-b57e is associated with the RLMA-2025-06425 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-b57e across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for node-calculator-b57e (version 2.2.3).

Malicious package

node-calculator-b57enpm

Advisory published Nov 17, 2025Updated Dec 24, 2025

node-calculator-b57e is a confirmed malicious npm package (MAL-2025-190539) that executes malicious code on install (malicious version 2.2.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in node-calculator-b57e (npm)

MAL-2025-190539

Immediate action

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

npm uninstall node-calculator-b57e

What this malware does

The package node-calculator-b57e was found to contain malicious code.

Malicious versions

1 flagged

2.2.3

Indicators of compromise (SHA-256)

55fce009148ad3e1daee59968f79f4d2699c313e012d062e6fe9bf5aed9833f5

a3bfd04c841aded075a852259ba0e968b543b9a98142da6a3112c37b1bc087cc

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for node-calculator-b57e (version 2.2.3).
If you installed it — respond
Remove node-calculator-b57e 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-b57e 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-b57e on npm has been identified as a malicious package (version 2.2.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-06425

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks node-calculator-b57e-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