Which versions of @zalastax/nolb-calc are malicious?

Every published version of @zalastax/nolb-calc on npm is considered malicious. Remove the package entirely.

How do I remediate @zalastax/nolb-calc if I installed it?

Remove @zalastax/nolb-calc 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 @zalastax/nolb-calc — how do I know if it already compromised me?

If @zalastax/nolb-calc 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 @zalastax/nolb-calc across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for @zalastax/nolb-calc (all published versions).

Part of a larger attack: @zalastax published 4544 malicious packages. See the full campaign →

Malicious package

@zalastax/nolb-calcnpm

Advisory published Aug 14, 2025Updated Aug 14, 2025

@zalastax/nolb-calc is a confirmed malicious npm package (MAL-2025-10854) that executes malicious code on install. Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @zalastax/nolb-calc (npm)

MAL-2025-10854

Immediate action

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

npm uninstall @zalastax/nolb-calc

What this malware does

The package @zalastax/nolb-calc was found to contain malicious code.

Malicious versions

all versions

Every published version of this package is considered malicious — remove it entirely.

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for @zalastax/nolb-calc (all published versions).
If you installed it — respond
Remove @zalastax/nolb-calc 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 @zalastax/nolb-calc 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. @zalastax/nolb-calc on npm has been identified as a malicious package (all published versions flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks @zalastax/nolb-calc-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

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