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Malicious package

cjdfswifuem3npm

Advisory published Updated

cjdfswifuem3 is a confirmed malicious npm package (MAL-2026-13793) 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 cjdfswifuem3 (npm)

MAL-2026-13793
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall cjdfswifuem3

What this malware does

The package has no JavaScript module; package.json declares main as index.html, which cannot be require()'d, so installing or importing this package produces no code execution on the installer. The sole shipped content is an index.html that renders a fake 'Performing security verification' page impersonating a Cloudflare Turnstile challenge, then after ~1s executes obfuscator.io-style code (rotating string array _0x5d5d, base64 decoder _0x92a0 with self-defense anti-debug class, indirect accessors) that constructs a URL and calls window.location.replace(targetUrl.toString()), forwarding the visitor's query parameters to a destination that is not readable in the shipped source. The only in-clear URLs are decoy cloudflare.com footer links used to sell the disguise. The npm registry is being abused as a hosting/distribution channel for a phishing-lure page rather than as a code package. Installers who run npm install cjdfswifuem3 are not attacked (no lifecycle scripts, no importable code, no credential access); the victims are end users who reach the hosted HTML via a phishing link. This is registry abuse warranting takedown but is not an installer-side supply-chain attack under this engine's threat model.

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

1 flagged
1.0.0

Indicators of compromise (SHA-256)

732b38878101a7d2632168e8014abfd9b8cf68f5625601bc05a2604cee9c5ff9
565ffd2f5127412df02a03f80345ff2420dc5545b65abff5298eac3bf1bf2990

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for cjdfswifuem3 (version 1.0.0).

  2. If you installed it — respond

    cjdfswifuem3 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 cjdfswifuem3 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. cjdfswifuem3 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

GHSA-w32m-789q-9hghIN-MAL-2026-017541

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks cjdfswifuem3-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

cjdfswifuem3 (npm) malicious package — MAL-2026-13793 | O3 Security