What does the node-calculator-8bf9 malware do?

The package node-calculator-8bf9 was found to contain malicious code. The OpenSSF Package Analysis project identified 'node-calculator-8bf9' @ 2.1.1 (npm) as malicious. It is considered malicious because: - The package communicates with a domain associated with malicious activity. - The package executes one or more commands associated with malicious behavior.

Which versions of node-calculator-8bf9 are malicious?

The following npm versions of node-calculator-8bf9 are flagged malicious: 2.1.1. Treat any of these as compromised.

How do I remediate node-calculator-8bf9 if I installed it?

Remove node-calculator-8bf9 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-8bf9 — how do I know if it already compromised me?

If node-calculator-8bf9 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 node-calculator-8bf9 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for node-calculator-8bf9 (version 2.1.1).

Malicious package

node-calculator-8bf9npm

Advisory published Nov 19, 2025Updated Nov 24, 2025

node-calculator-8bf9 is a confirmed malicious npm package (MAL-2025-190570) that executes malicious code on install (malicious version 2.1.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in node-calculator-8bf9 (npm)

MAL-2025-190570

Immediate action

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

npm uninstall node-calculator-8bf9

What this malware does

The package node-calculator-8bf9 was found to contain malicious code.

The OpenSSF Package Analysis project identified 'node-calculator-8bf9' @ 2.1.1 (npm) as malicious.

It is considered malicious because:

The package communicates with a domain associated with malicious activity.
The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged

2.1.1

Indicators of compromise (SHA-256)

9b9deb9df1c50aa7f0a81914c4a26ff198e50dd6d4d0545eb6317944726ce72c

10b1f195cda1193bb7e83d1da57c34d1a22ca912d27dbb065199754dcc8c47f8

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for node-calculator-8bf9 (version 2.1.1).
If you installed it — respond
Remove node-calculator-8bf9 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-8bf9 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-8bf9 on npm has been identified as a malicious package (version 2.1.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

Amazon Inspector · finder
OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks node-calculator-8bf9-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