What does the node-calculator-6a88 malware do?

The package node-calculator-6a88 was found to contain malicious code. The OpenSSF Package Analysis project identified 'node-calculator-6a88' @ 2.5.0 (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-6a88 are malicious?

The following npm versions of node-calculator-6a88 are flagged malicious: 2.5.0. Treat any of these as compromised.

How do I remediate node-calculator-6a88 if I installed it?

Remove node-calculator-6a88 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-6a88 — how do I know if it already compromised me?

If node-calculator-6a88 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-6a88 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for node-calculator-6a88 (version 2.5.0).

Malicious package

node-calculator-6a88npm

Advisory published Nov 17, 2025Updated Nov 17, 2025

node-calculator-6a88 is a confirmed malicious npm package (MAL-2025-190514) that executes malicious code on install (malicious version 2.5.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in node-calculator-6a88 (npm)

MAL-2025-190514

Immediate action

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

npm uninstall node-calculator-6a88

What this malware does

The package node-calculator-6a88 was found to contain malicious code.

The OpenSSF Package Analysis project identified 'node-calculator-6a88' @ 2.5.0 (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

2.5.0

Indicators of compromise (SHA-256)

25a92b8d02d9ea706cba7f9c449c35b0f6d1e5e9a21209ff42e734152e6f39bb

4d3d08012b0edb7ff8014e7fd9d38b051af2d415bc1d506a474477a85d62eaf0

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for node-calculator-6a88 (version 2.5.0).
If you installed it — respond
Remove node-calculator-6a88 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-6a88 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-6a88 on npm has been identified as a malicious package (version 2.5.0 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-6a88-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