YubitSec CTF - File - Forensic

Problem

Challenge's link

https://drive.google.com/open?id=0B_jBF_ZqfxnBd0tKcDJMVkw1Njg

What is this file ? Can you find hidden flag ?

Flag format: YUBITSEC{}

Solution

Using binwalk to analyse the downloaded file reveals a collection of zip files.

Running binwalk -e to extract gives another zip file. Repeating the extraction process eventually leads to folder labelled last that contains flag.png which has the text C0MPR3SS10N_1S_G00D.

FLAG: YUBITSEC{C0MPR3SS10N_1S_G00D}