49th Security Division

What are CTF's?

A Capture the Flag (CTF) competition is a type of computer security competition in which a person or team is given a variety of problems to complete. To receive points, the person or team must submit the proper flag or solution, which is discovered through completing the tasks. We've put up a little CTF for you to try out. If you're having trouble finding the flag, click the hint button to assist you.


Challenge 1: HTML

Can you find the hidden flag on this webpage?



Hint: (F12)

Challenge 2: Decode

Can you decrypt the encrypted message?

Message: 01110101 01011111 01010010 01011111 01001000 01000000 01100011 01101011 00110011 01110010



Hint: Binary

Challenge 3: Log Analysis

For this challenge you'll need this log file

Question 1

How many lines are there in the log file?



Command Line Tool wc

Question 2

How many Unique IP's are there in the log file?



Command Line Tool cat, cut uniq

Question 3

What is the IP address from which the server got more traffic from?



Command Line Tool cat, cut, sort, uniq

Question 4

What is the URL which was most visited?



Command Line Tool cat, cut, sort, uniq

Question 5

What is the Total count of requests which got a 200 response?



Command Line Tool cat, cut, sort, uniq

Challenge 4: Cryptography

Alice just sent a secret message to Bob, can you find out what they were trying to communicate?

Encrypted Message: o3Ss0_i0I



This text is encoded using a popular Encryption technique

More challenges are on the way...