This was the same as crackme question from the same CTF, just that we had to do the same for about 200 files.
I used this command to get the answer for all the files, then encodeed in base64 and sent to server.
```
for i in *; do objdump $i -d -M intel| grep 'cmp rdi' | python3 -c 'while 1: print(chr(int(input()[-2:],16)),end="")'; printf '|%s\n' $i; done 2>/dev/null
```

crackme writeup: [https://ctftime.org/writeup/6625](https://ctftime.org/writeup/6625)