Summary

Author: @proslasher

This trick is nothing new, you know what to do: iSteg. Look for the tail that's older than time, this Spike, you shouldn't climb.

Steps

The challenge description gave us a hint by calling for iSteg. Looking on Github I discovered iSteg by rafiibrahim8. I downloaded the the jar file to Kali and executed it using java -jar iSteg-v2.1_GUI.jar. This launched the GUI and I was able to reveal the hidden text and get the flag.

flag: flag{da1e2bf9951c9eb1c33b1d2008064fee}