SheHacks Intervarsity CTF

Over the weekend, I had the opportunity of attending the Intervarsity CTF organized by Shehacks Kenya whith my school’s CTF team @Dumb1d0r3♾️🟰♾️

I and my team solved some few challenges and we had fun playing and learning.

I’ll take you through some of the challenges we solved.

Android

The first challenge was called Multilingual and was pretty easy.

I can’t seem to pick out the hidden message. Can you assit? multilingual.apk

I solved this one quite easy. We get an android APK file and we are to find the flag.

I first decompile the application with apktool.

I then went ahead to grep the strings with words like flag and was able to capture interesting encoded strings.

I then went ahead to arrange the identified parts in the order part1,part2,part3 to form ZmxhZ3tDNGxsX00zX011bHQxbDFuZ3U0bH0=

This been base64 encoded, I decoded it using echo "ZmxhZ3tDNGxsX00zX011bHQxbDFuZ3U0bH0" | base64 -d and we got our flag.

That was it for that challenge.