tertiary

114pt 39solves

Solution

$ gdb ./tertiary
(gdb)$ b *0x555555554000+0x11ef
(gdb)$ run
(gdb)$ x/s $rsp 

Reference

twitter: @kam1tsur3

Original writeup (https://github.com/kam1tsur3/2021_CTF/blob/master/s4ctf/rev/tertiary/README.md).