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Malicious package

twcvhjlksdmxnpm

Advisory published Updated

twcvhjlksdmx is a confirmed malicious npm package (MAL-2026-13836) that typosquats a legitimate package to trick installs (malicious versions 1.0.0, 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in twcvhjlksdmx (npm)

MAL-2026-13836
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall twcvhjlksdmx

What this malware does

The tarball contains only package.json and index.html. package.json declares no preinstall/install/postinstall/prepare lifecycle hooks and sets main to index.html, which is not a loadable JavaScript module and will not execute on npm install or on require(). index.html impersonates a Cloudflare 'Just a moment' interstitial and embeds an obfuscator.io-style script (string-array + base64 _0x5844 decoder) that constructs a URL and calls window.location.replace to redirect the browser. The redirect only fires if a user opens the HTML file in a browser; it does not run against a developer or build system that installs or requires this package.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

2 flagged
1.0.01.0.1

Indicators of compromise (SHA-256)

9b23aefc385a2c9eb5243177ecee09d4e2490a26764cf686946d343cbab9fe53
60b37bf3e91951e089b31d7aa6d31834fef110ba5bfc1c8c3cb09e701c9c1878
799b4b725cf0fc509be84ebef8ce52e119581d1ea493521523745e9208997beb

Detection & response playbook

Typosquat
  1. Find it

    Search your lockfiles and build artifacts for twcvhjlksdmx (2 malicious versions).

  2. If you installed it — respond

    twcvhjlksdmx is a typosquat — you almost certainly intended a legitimately-named package. Remove twcvhjlksdmx, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

  3. Did it already run?

    If twcvhjlksdmx 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. twcvhjlksdmx on npm has been identified as a malicious package (versions 1.0.0, 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-pw3v-jpfx-hh5wIN-MAL-2026-017417IN-MAL-2026-017440

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks twcvhjlksdmx-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

twcvhjlksdmx (npm) malicious package — MAL-2026-13836 | O3 Security