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Malicious package

niksinnkatalappnpm

Advisory published Updated

niksinnkatalapp is a confirmed malicious npm package (MAL-2026-17435) that steals credentials and exfiltrates sensitive data (malicious version 100.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in niksinnkatalapp (npm)

MAL-2026-17435
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall niksinnkatalapp

What this malware does

niksinnkatalapp is a dependency-confusion package: it takes a name that looks like an internal project, uses an inflated version (100.0.0) so it outranks private-registry versions, and runs node setup.js || true as a preinstall script on npm install. setup.js sends the hostname, username, working directory, OS, architecture, Node.js version and configured npm registry, with a per-package tracking token, in an HTTPS POST to https://s85r5k14qk.execute-api.us-east-1.amazonaws.com/prod/hook. The npm account amel10 published niksinnkatalapp and 9 similar packages within two minutes on 2026-09-30, all with the same setup.js.

The package declares a preinstall hook that runs setup.js on npm install. setup.js collects host identifiers (os.hostname(), os.userInfo().username, process.cwd(), platform, arch, node version, and the configured npm registry) and POSTs them as JSON, together with a hardcoded correlation token, to https://s85r5k14qk.execute-api.us-east-1.amazonaws.com/prod/hook. The advertised purpose is a trivial celsius-to-fahrenheit conversion, which does not require telemetry or network activity. The package name and 100.0.0 version pin are consistent with a dependency-confusion lure intended to win resolution against an internal package name and beacon out from build environments that install it.

Malicious versions

1 flagged
100.0.0

Indicators of compromise (SHA-256)

25ce51139798c658f3018f19912e889df1b0ce31025a6236a473d959b12ef0d9

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for niksinnkatalapp (version 100.0.0).

  2. If you installed it — respond

    niksinnkatalapp 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 niksinnkatalapp 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. niksinnkatalapp on npm has been identified as a malicious package (version 100.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020940

References

Credits

  • Amazon Inspector · finder
  • InvisiRisk, Inc. · finder

Detect & block this

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

Explore

niksinnkatalapp (npm) malicious package — MAL-2026-17435 | O3 Security