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 (8f27a3b0f4b5c8f210576fe33a1251d774926e6c7405591948c5bc3dfa00e7aa)
On require, index.js loads _init.js which selects an OS/arch-specific staging path, downloads a binary payload from hardcoded Cloudflare Workers hosts assembled by joining split character arrays (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT fallback channel across *.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site), writes the bytes to disguised paths such as /var/tmp/.cache_<rand> or a Windows Temp/dotnet_diag_<rand>.exe, chmods to 0755, and spawn-detaches /bin/sh (or cmd) to execute the binary in the background. Destination hostnames are obfuscated by array-split-and-join to defeat static scanners; the payload is staged under decoy filenames posing as.NET diagnostics or cache files. A second full copy of the dropper is bundled in lib/telemetry.js (not reached from the current entry graph) using the same base64-decode, chmod 0755, and /bin/sh spawn shape, providing an alternate loader.
Source: ghsa-malware (3b82b8abbaab89079233a8bd4e99a3a23c618d6bf481e8d0eaeb29805ed52ee1)
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.