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The package's preinstall hook runs index.js which fires automatically on npm install. The script collects host reconnaissance (os.hostname(), os.userInfo().username, home directory, DNS servers, __dirname) and reads the contents of /etc/passwd and /etc/hosts from the installer's machine, then HTTPS-POSTs a JSON payload to the hardcoded Burp Collaborator subdomain 5tzh3l2e1cetr1chf6osh4tg57b0zqnf.oastify.com. The behavior is unrelated to the package's advertised purpose as a React app template and is characteristic of a dependency-confusion exfiltration payload.
1.0.1Exploitability
AV:NAC:LPR:NUI:NScope
S:CImpact
C:HI:HA:H10.0/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H