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Level 2

Level 2 is a bit more of an intermediate level. This level was designed for people who want to understand reverse engineering from a deeper angle and take the knowledge and theory they built from the previous level and advance it during this stage of the playground.

This level is a bit more secure :0

Objectives ( Sections 1.0 - 8.0 )

Section 1.0 (Binary Integrity System)

  • Figure out the amount of time (in hex) that the program took before comparing the hashes again. This was done on a thread.
  • Figure out the filename that the program writes to and also figure out the hash it uses.
  • Figure how the data fetched remotely and what was called to get it to fetch the resource
  • Find out what hashing algorithm did the program utilize for binary integrity
  • Find out what was the RAW URL that the program used to fetch the production hash
  • How are you able to bypass the integrity system?

Section 2.0 (Protection Systems)

  • Figure out the protection method(s) used within this application
  • Explain how the binary integrity system worked. What algorithms, was it mixing algorithms or just using one? Was the system also server side or client side?

Section 3.0 (Data & information)

  • What was the user of the account that was made on the remote resource (where the hash was fetched)

Section 4.0 (Beeps and Kinks)

  • FUCK! That beep is so annoying and it lags the menu SUPERRR hard when you login...can you find out the few functions that are called every time a button is pressed and shut those timers and durations to 0s?
  • Find out what frequency the beeps are
  • Find out how the Beeps are created
  • Find out what the seconds were for the lasting effect of the beep.

Section 5.0 (Vulnerabilities & Binary Auditing)

  • There were a few good vulnerabilities in here. Try to find them and explain what kind of vulnerabilities there is.

Section 6.0 (Networking & Web)

  • Find out what port the server was hosted on
  • Find out what the main homepage was and how you can swap it out
  • Figure out the endpoint URL the page makes a POST request to for login
  • There was a buffer overflow within the server's parsing logic, what area was it in?
  • There was also an integer overflow system here, where was it?
  • There was a function that compared the pre-generated license. What is the license algorithm? Is it using a specific standard? And what is the seed? Could you generate the same example?
  • If you could load the main page, what location was the logo inside of the login form being pulled from?
  • Once done analyzing the paths, maybe create your own HTML file for the server to load! Make it customized (not a question or objective but something fun to do)
  • What made it easy to trace the server calls / binding / startup functions?
  • There was a vulnerability in the website itself, what was it?

Section 7.0 (Exploit Development)

  • This is a really long task- but your task is to build your own exploit preferably in C++ using the Windows API to read and write from the cheats process. This code will then write to a specific address in memory, this address, is the address of where a specific variable is being stored. You then need to change the variable to hold the value that represents the user is logged in all the time.

Skills Required

In order to solve this level, you need to not only go through level 1 but also have core fundamental reverse engineering theory and also decent CompSCI knowledge, and a tiny bit of web testing experience. Some binary auditing is required, but at this point and stage, you can learn it.

Tip: Check attack map below

Objectives you need to complete L1-L2 before being able to do this level

  • Crack the login system 100%
  • Bypass the binary integrity system to crack the login system