Saihat's Network Security Blog

Introduction Today we're going to be doing a CTF challenge walkthrough of the Emdee Five for Life challenge hosted at https://app.hackthebox.eu/challenges/67 . Emdee five for life is a cryptography and scripting challenge. For this walkthrough, we'll be using a Kali Linux virtual machine as our attacking system. After starting the challenge instance, we find that the associated URL is http://139.59.178.146:30204/ . The challenge's description is as follows: CHALLENGE DESCRIPTION Can you encrypt fast enough? Initial Enumeration From the challenge name and description, we can guess that MD5 encryption will play a part in completing the challenge. Let's visit the challenge URL : http://139.59.178.146:30204/  We can copy the string, then use the MD5sum command to return a MD5 -encrypted version of the string: echo -n "dc4YGQyrs6q9BsIAituO" | md5sum Then we copy the output of the command and submit it to the web form, which results in this: We kn...