Cats At Play

50 Points / 355 Solves
Overall difficulty for me (From 1-10 stars): ★☆☆☆☆☆☆☆☆☆☆

Background

My cat has decided to become a programmer. What a silly guy!

Find the flag

In this challenge, we can download a file:

┌[siunam♥earth]-(~/ctf/RITSEC-CTF-2023/Reversing/Cats-At-Play)-[2023.04.01|18:39:26(HKT)]
└> file meow.exe 
meow.exe: PE32 executable (console) Intel 80386, for MS Windows, 4 sections

It’s an 32-bit executable for Windows.

As the challenge’s title suggested, let’s use strings and grep to find the flag!

┌[siunam♥earth]-(~/ctf/RITSEC-CTF-2023/Reversing/Cats-At-Play)-[2023.04.01|18:40:44(HKT)]
└> strings meow.exe | grep -E '^RS'
RS{C4tsL1keStr1ng5}

The strings <filename> will list out all the strings inside that file.

The grep -E '^RS' will grab anything that starts with RS.

Flag: RS{C4tsL1keStr1ng5}

Conclusion

What we’ve learned:

Using strings To List Out All The Strings Inside A File