Simple reverse engineering challenge for 100 points, full writeup:

[https://ctf.rip/write-ups/crypto/rsa/reversing/rarctf-2021/#verybabyrev](https://ctf.rip/write-ups/crypto/rsa/reversing/rarctf-2021/#verybabyrev)

Original writeup (https://ctf.rip/write-ups/crypto/rsa/reversing/rarctf-2021/#verybabyrev).