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Malicious package

xa424234657567npm

Advisory published Updated

xa424234657567 is a confirmed malicious npm package (MAL-2026-16277) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in xa424234657567 (npm)

MAL-2026-16277
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall xa424234657567

What this malware does

The package ships console.js, which when loaded in a browser on any host matching duel.com fetches https://unpkg.com/[email protected]/1.js and https://unpkg.com/[email protected]/ui.js and executes both via (0, eval)(...). On other hosts it redirects the page to duel.com. The declared main/unpkg entry 1.js is a ~740KB single-line Function("ZU7mhwD", "...") loader built from hex-escaped char arrays and a rotor-style decoder, with no readable source. Package metadata is placeholder-quality (name xa424234657567, no README, no repository), inconsistent with a library and consistent with a payload-delivery artifact. Consuming this package on a page served under duel.com results in remote, mutable, attacker-controlled code executing in the page context.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

0174148efc99cd1130b3b9f2c57599aac0f80ead454fd7dc0f397386db891b0c

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for xa424234657567 (version 1.0.0).

  2. If you installed it — respond

    Remove xa424234657567 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 xa424234657567 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. xa424234657567 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-2026-020175

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks xa424234657567-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

xa424234657567 (npm) malicious package — MAL-2026-16277 | O3 Security