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 (b7e5ae73b4b2f79e2790e4c9f503a3f469166c8d5587f7e84ac6a09022d1617f)
On require() of the package, index.js unconditionally loads _vendor.js, which selects an OS/arch-specific payload path and fetches an opaque binary over HTTPS from string-obfuscated Cloudflare Workers hosts (oob-worker.cf*-*.workers.dev, assembled at runtime via array-join to evade static analysis). A DNS-TXT covert-channel fallback reads a chunk count from c.dl.wel1.ru and reassembles base64-encoded bytes across numbered subdomains of dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under disguised names (e.g. dotnet_diag_*.exe,.cache_*), chmod 0755, and spawned detached via /bin/sh -c or cmd. No pinning, hash check, or signature verification is performed, and the destinations are not the publisher's infrastructure.