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Malicious package

stnsxmp3npm

Advisory published Updated

stnsxmp3 is a confirmed malicious npm package (MAL-2026-1858) that executes malicious code on install (malicious version 0.30.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in stnsxmp3 (npm)

MAL-2026-1858
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall stnsxmp3

What this malware does

The package stnsxmp3 was found to contain malicious code.

Malicious versions

1 flagged
0.30.1

Indicators of compromise (SHA-256)

5fe72f8d1f44f9fecf26723940a62a4983b73cd18aa7c56b3b978b9b4283405c
7ceb45e3044f3a3acbefdbdf144ca9aae81091d1cfdf84f5768de4df7176a231

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for stnsxmp3 (version 0.30.1).

  2. If you installed it — respond

    Remove stnsxmp3 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.

  3. Did it already run?

    If stnsxmp3 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. stnsxmp3 on npm has been identified as a malicious package (version 0.30.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01593

Credits

  • Amazon Inspector · finder
  • ReversingLabs · finder

Detect & block this

O3 blocks stnsxmp3-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.

Explore

stnsxmp3 (npm) malicious package — MAL-2026-1858 | O3 Security