internallib_v875npm
Advisory published Updated
internallib_v875 is a confirmed malicious npm package (MAL-2026-17635) that executes malicious code on install (malicious version 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in internallib_v875 (npm)
What this malware does
internallib_v875 ships an index.js whose exported command() function invokes /bin/bash -c with curl piped to sh, fetching a reverse-shell payload from https://reverse-shell.sh targeted at the hardcoded endpoint 10.0.19.80:8443. Any consumer that requires this package and calls the exported function triggers a fetch-and-execute of attacker-controlled shell content, giving whoever controls that IP:port an interactive shell on the host. The destination is unrelated to any legitimate publisher, the fetched bytes are executed without verification, and the package has no other functionality consistent with its name.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for internallib_v875 (version 1.0.1).
If you installed it — respond
Remove internallib_v875 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_v875 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_v875-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.