In this paper, a detailed overview on steganography & its Types, tools, techniques is conducted to study and look over them. This research involves the steganography using binwalk tool in the Necromancer. Necromancer is the vulnerable virtual machine, in order to gain the root access of VM (Virtual Machine) there are 11 flags to collect on the way, Few flags are found by using the Binwalk tool, to know the hint behind image, so we have used an Image steganography in one of flag of Necromancer. Flags are nothing but any encrypted code. Steganography refers to the act of camouflage the secret data within any image, audio, video in order to avoid the detection. The secret data is then extracted at its destination. The use of steganography are often combined with encryption as an additional step for hiding or protecting data.