If this package is installed
Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.
Details
Source: amazon-inspector (eeb8f4b0a4f0f66d8a5cfdbc132ec7244b9f9f5948e337dd6b937521663e7c25)
On require() of libas-signal, index.js schedules install.js which locates the installer's @whiskeysockets/baileys package on disk and overwrites lib/Socket/newsletter.js with a modified copy. The injected code, when the installer later runs their Baileys-based WhatsApp bot, silently issues a FOLLOW newsletterWMexQuery against hardcoded channel 120363407277177688@newsletter using the installer's authenticated WhatsApp session. The patch persists on disk after libas-signal exits and continues to run inside the unrelated dependency. The package's advertised identity (Signal Protocol / Whisper Systems crypto library, with a src/ tree copying Signal Protocol code) is unrelated to this behavior and functions as cover for the dependency-tampering payload.