@offa-uwk/offa-uwk@999.0.6

On `npm install`, the package's postinstall script (`node index.js`) collects host identifiers (`os.hostname()`, `os.userInfo().username`, `process.cwd()`) and POSTs them via HTTPS to a hardcoded webhook.site collector at `https://webhook.site/e6b10849-38dc-4280-a8e3-72ab39cfaf65`. Immediately after the beacon, the script executes `shutdown -h now` with a fallback of `systemctl poweroff`, forcibly powering off the installing host. A preinstall step also writes a marker file to the absolute path `/home/OFFA/flag`, outside the package directory. Package metadata (name `@offa-uwk/offa-uwk`, version `999.0.6`) is consistent with a proof-of-concept malicious artifact.