File Recovery

Files

When we unzip the tar file, we end up with two files.
We use our best friend file

file *

flag.enc:    data
private.pem: PEM RSA private key

So we got a RSA private key.

Openssl

Openssl will help us decrypt flag.enc using the private.pem

openssl rsautl -decrypt -inkey private.pem  -in flag.enc -out something

cat something

FLAG-vOAM5ZcReMNzJqOfxLauakHx

The flag is : FLAG-vOAM5ZcReMNzJqOfxLauakHx