Master License Registration Patching for Program (x64dbg)

Table of Contents

1. Introduction
2. What is Program Patching?
3. Choosing the Right Debugger
4. Installing the Debugger
5. Installing the Target Trial Software
6. Finding Clues for Reverse Engineering
7. Disassembling the Software
8. Identifying the Error Message
9. Searching for the Error Message String
10. Locating the Success Function
11. Making a Jump Procedure
12. Verifying the Changes Made
13. Creating the Patch
14. Testing the Patched Software
15. Renaming and Executing the Patched Software
16. Conclusion

Introduction

In this tutorial, we will explore the process of program patching to convert a trial software into a pro or premium version. We will use a debugger to analyze the software and reverse engineer its registration process. By finding and modifying specific code instructions, we will create a patch that bypasses the registration process and unlocks the full functionality of the software. Please note that modifying software without the owner's permission for resale or distribution is illegal.

What is Program Patching?

Program patching is the process of modifying a software application to alter its behavior or unlock additional features. It involves analyzing the software's code, identifying the relevant instructions, and making changes to achieve the desired outcome. In this tutorial, we will focus on patching trial software to convert it into a pro version.

Choosing the Right Debugger

Before we begin, it is important to choose the right debugger for analyzing and modifying the software. For this tutorial, we recommend using x64 dbg. It is a powerful debugger that allows us to access process memory at the kernel level, enabling us to inspect and manipulate the software's code effectively.

Installing the Debugger

To get started, we need to install x64 dbg on our system. You can find the download link in the video description or on the screen. Once downloaded, run the installer and follow the on-screen instructions to complete the installation process. After installation, make sure to run x64 dbg as an administrator to access process memory at the kernel level.

Installing the Target Trial Software

Next, we need to install the trial software that we want to patch. If you have already installed the software, make sure it is running before proceeding. If not, install the target software according to the instructions provided by the software's developer. Once the target software is installed and running, we can proceed with the patching process.

Finding Clues for Reverse Engineering

To reverse engineer the target software and create a patch, we need to find a clue about what happens when an incorrect registration code or details are entered. This clue will help us identify the error message that is displayed when an incorrect entry is made. To find this clue, locate the registration option in the target software and attempt entering the required name code. Take note of the error message that is returned when a wrong entry is made.

Disassembling the Software

With the error message identified, we can now disassemble the target software to reverse engineer a patch that bypasses the registration process. Using x64 dbg, we will disassemble the software and examine its code instructions to locate the relevant function and memory offsets.

Identifying the Error Message

In our disassembled code, we need to search for the error message string that we previously identified. By performing a literal string search using x64 dbg, we can locate all instances of the error message within the target software and its resource dependencies.

Searching for the Error Message String

To search for the error message string, right-click to reveal the context menu in x64 dbg and navigate to "Search For" and then "All Modules." This will initiate the search procedure, which will find all literal strings within the target application. Wait for the search to complete before proceeding.

Locating the Success Function

After the search is complete, input the error message you wrote down earlier into x64 dbg. The debugger will attempt to match the error message to one of the strings it found during the search. Once matched, you will be able to see the address offset and instruction that calls the error message.

Making a Jump Procedure

With the error message function identified, we need to find the function that is called when the registration details entered are correct. This success function is the key to creating our patch. Scroll through the code to locate the success message and its address offset. We will create a jump procedure from the original error message function to the success function.

Verifying the Changes Made

To ensure that the jump procedure is correct, follow the jump and the additional procedures that come after it. Verify that it is going to the correct address offset and executing the intended code. This verification step is essential to ensure the accuracy of our patch.

Creating the Patch

Now that we have confirmed the jump procedure, we can alter the function call from the error message function to the success function. Double-click the operational code and change it from its original form to a "jmp" instruction. Save the changes and create a patch using x64 dbg's patching options.

Testing the Patched Software

With the patch created, it is time to test our modified software. Detach x64 dbg from the kernel process and close the debugger application. Locate the newly patched software in the location where you saved it. Rename the original trialware version of the software to something else and rename the patched version with the same name as the target software. Run the program from its saved location and verify that the patched software functions as intended.

Renaming and Executing the Patched Software

To execute the newly patched software, rename the original trialware version to something else and rename the patched version to hold the name of the original software. By maintaining the original software's name, we ensure compatibility and seamless execution.

Conclusion

Congratulations! You have successfully learned the process of reverse engineering software and creating a patch to convert trial software into a pro or premium version. Remember, modifying software without permission for resale or distribution is illegal. This tutorial is solely for educational purposes and to gain a better understanding of software workings. If you found this tutorial informative, please share it with others and consider subscribing to support the channel.