A simple APK, reverse engineer the logic, recreate the flag, and submit!
2 weeks ago
Super Easy !
3 weeks ago
I also jumped out of my chair when I solved it! Good challenge.
1 month ago
2 months ago
3 months ago
I don't know Android (well, except for what i do with my phone), neither do i know Java (i am a C and assembly aficionado). Nevertheless, this challenge was funny ...
Moreover, i have been able to solve it using only online tools (which is great, IMHO) ...
4 months ago
It was freakin awesome!!!! I just jumped out of my chair when the flag matched at last!!!!!!
My very first RE. I loved that the flag was not given as a single piece. Nicely done. Thank you
1 year ago
Ive been told by a number of users that they have had issues with the md5 portion of this challenge. As cracking it was not the focus point I have provided a link below to a website that will successfully decrypt it.
5 months ago
Excellent! I learned to use 2 new online tools, one to decompile the api file and the other to decode the MD5 hash.
Thanks your hint
This is a good one. You can use apktool on linux, but use it only if you are a little familiar with assembly. Otherwise use one of the online tools mentioned in the comment.
9 months ago
To be honest, this was best. Here's the hint:
use apktool , dex-tools and jd-gui. Newbie you will surely enjoy this.