Childhood Photo

Category: Forensics Points: 500 Flag: KICTF{r3v3rs3d_jp3g_h34d3r_f1x3d}

Challenge Overview

We received a file named gepj.lanif. Reversed, this becomes final.jpeg.

Step 1 – Reverse File Content

The JPEG file was completely reversed at the byte level.

data = open("final.jpeg","rb").read()
open("fixed.jpeg","wb").write(data[::-1])

Step 2 – Check for Embedded Files

Using binwalk, we discovered two JPEG images embedded in the file.

We extracted the second image and found the hidden flag.