Tags: rev 

Rating:

# Break My Record

## Task

![task](./src/task.png)

[Tale_Rang.apk](./src/Tale_Rang.apk)

## Solution

I didn't wanna to install this app, so I just decompiled it with jadx. There are a lot of files with code, but I didn't analyze all of it, I just watched it through in order to find something interesting. And here it is! In FourthActivity if found the following code:

![fourth_activity](./src/fourth_activity.png)

Seems like here your score compares to the best score. And if you scored more, base64 encoded flag will be printed.

Decoding the base:

![base](./src/base.png)

UUTCTF{7c34446d10bbb60d0cae15059fffc98d}

Original writeup (https://github.com/0awawa0/CTF-Writeups/tree/master/UUTCTF%202019/Reverse/Break%20My%20Record).