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 (fe9863d2e47d22ca16f42efd68d0c79e0b2730b48984bf68b040f6f920fb70ec)
Package presents itself as a date-formatting utility (index.js is a four-line toLocaleDateString wrapper) but its package.json postinstall hook runs an inline shell pipeline that reads /proc/self/status, /dev, /home/work, /wenchain, and /etc/hosts, probes internal Kubernetes API endpoints, and POSTs the collected output to an attacker-controlled Interactsh OAST endpoint at safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfo2. The tarball also ships postinstall.js, which enumerates the installer's ~/.ssh directory, gathers filenames plus username and platform, and POSTs the JSON payload over HTTPS to the hardcoded IP 124.221.154.135. Both behaviors auto-execute on npm install.