CTF-Writeups/HackTheBox/MD5-4-life.md

HackTheBox-Emdee Five For Life

We are presented with this html page having a string and told to encrpyt it with MD5 but when we try to submit it after encrpyting we get a message "Too Slow"

Intercepting the request with Burp Suite and found that we have to make a POST request to send the MD5 hash

Also the string is generated randomly so we need to script it and the best language for this is python so I used python libraries requests , hashlib and BeautifulSoup

import hashlib
import requests
from bs4 import BeautifulSoup

# Persists cookies across all requests
request = requests.session()
# URL For the challenge page
url = "http://159.65.25.97:31667"
page = request.get(url)

soup = BeautifulSoup(page.content,"html.parser")
# Saving the string to be encrpyted
string_to_encrpyt = soup.select('h3')[0].text

# Caluclating hash of the string
MD5 = hashlib.md5(string_to_encrpyt.encode('utf-8')).hexdigest()

# POST data to send
data = {'hash' :MD5}

# Sending data as POST request
response = request.post(url,data)
print(response.text)

We got the flag !!!