Challenge Description

The challenge asks the attacker to uncover the hidden strings within the given apk ie the flag

Approach

The files are extracted from the apk using apktools
This creates a folder called challenge , which stores all the extracted files and folders
A 'cat * | grep -wR 'p3nt35t' is ran in the challenge folder which reads the whole world -w (ie all folders) recursively -R for the string 'p3nt35t'
The stdout returns that a matching binary is found in lib/armeabi-v7a/libfindme.so file
Upon using strings upon the file we find the flag hidden in it
Flag = p3nt35t{y0u_f0uNd_$tr!ng5.xm1_f!13}