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Malicious package

tiny-viewport-unit-calcnpm

Advisory published Updated

tiny-viewport-unit-calc is a confirmed malicious npm package (MAL-2026-17528) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in tiny-viewport-unit-calc (npm)

MAL-2026-17528
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall tiny-viewport-unit-calc

What this malware does

The package ships thunderboltRegistry.js, a module that imports Node's child_process primitives and executes whoami plus repeated ping commands against external hostnames, with POST calls present in the same file. The pattern (whoami capture + repeated ping-based beacons + outbound POSTs) is host-reconnaissance and DNS/ICMP-channel exfiltration shape, directed from the installer's machine to an external endpoint. The behavior is unrelated to the package's advertised purpose (a trivial viewport-unit calculator) and provides no functionality to a consumer; its only effect is to leak host identity information off-host when the module is loaded or invoked.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

34c221d8f8f0fedded27bfc22763912ffd96e9f3d1b2c08932e054ed418f493e

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for tiny-viewport-unit-calc (version 1.0.0).

  2. If you installed it — respond

    tiny-viewport-unit-calc is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If tiny-viewport-unit-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. tiny-viewport-unit-calc on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020960

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks tiny-viewport-unit-calc-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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tiny-viewport-unit-calc (npm) malicious package — MAL-2026-17528 | O3 Security