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Naum Aksenov
Naum Aksenov

CoreAVC Professional Edition v2.5.5.0 Patch - Modify DLL File and Enjoy High-Quality Videos




How to Hack CoreAVC Professional Edition v2.5.5.0




CoreAVC is a video software that uses the H.264 codec to decode and play high-quality videos with low CPU usage. It is one of the fastest and most efficient video decoders available, but it is not free. You need to purchase a license key to register and use it without limitations.




HACK CoreAVC Professional Edition V2.5.5.0 Key



However, if you are not willing or able to pay for a license key, there is a way to hack CoreAVC and use it for free. In this article, I will show you how to crack CoreAVC Professional Edition v2.5.5.0 by modifying its DLL file and bypassing its registration check.


Before we begin, I must warn you that hacking software is illegal and unethical, and may cause damage to your system or data. You should only do this for educational purposes and at your own risk.


What You Need to Hack CoreAVC




To hack CoreAVC, you will need some tools and skills that will help you analyze and modify its code.


  • A disassembler: This is a program that converts executable files into assembly code, which is a low-level programming language that you can read and edit.



  • A hex editor: This is a program that allows you to view and edit binary data in hexadecimal format.



  • Assembly programming knowledge: This is a skill that allows you to understand and manipulate assembly code.



There are many disassemblers and hex editors available online, but for this tutorial, I will use IDA Pro as my disassembler and HxD as my hex editor.


Downloading and Installing CoreAVC




The first step is to download and install CoreAVC Professional Edition v2.5.5.0 on your Windows computer.


  • Go to [1](https://coreavc.en.softonic.com/) and click on "Free Download".



  • Save the file "Core AVC_Professional_Edition_v2.5.5.0.exe" to your desired location.



  • Run the file and follow the installation wizard. You can choose the default settings or customize them according to your preferences.



  • When the installation is complete, you will see a window asking you to enter your registration key. You can click on "Cancel" for now, as we will hack it later.



Congratulations, you have successfully installed CoreAVC on your computer. Now, let's move on to the next step.


Finding the Registration Key




The second step is to find the registration key that CoreAVC uses to verify its license. This key is stored in the CoreAVC.dll file, which is located in the installation folder of CoreAVC (usually C:\Program Files\CoreCodec\CoreAVC Professional Edition).


  • Open HxD and click on "File" > "Open". Navigate to the CoreAVC installation folder and select the CoreAVC.dll file. Click on "Open".



  • In the hex editor window, press Ctrl+F to open the search dialog. Select "Hex-values" as the search mode and enter "43 6F 72 65 41 56 43 20 50 72 6F 66 65 73 73 69 6F 6E 61 6C" as the search string. This is the hexadecimal representation of the text "CoreAVC Professional". Click on "OK".



  • You will see that HxD has highlighted the first occurrence of the search string in the hex editor window. If you look at the right panel, you will see that it corresponds to the text "CoreAVC Professional Edition v2.5.5.0".



  • Now, look at the next line below the highlighted one. You will see a series of hexadecimal values that look like this: "31 32 33 34 35 36 37 38 39 30". If you look at the right panel, you will see that they correspond to the text "1234567890". This is the registration key that CoreAVC uses to check its license.



  • Right-click on the highlighted text "1234567890" and select "Copy". You have just copied the registration key to your clipboard.



Well done, you have just found the registration key that CoreAVC uses to verify its license. Now, let's move on to the next step.



Modifying the CoreAVC.dll File




The third step is to modify the CoreAVC.dll file so that it accepts any registration key as valid. To do this, we will use IDA Pro to open the DLL file and locate the function that checks the registration key.


  • Open IDA Pro and click on "File" > "Open". Navigate to the CoreAVC installation folder and select the CoreAVC.dll file. Click on "Open".



  • IDA Pro will start analyzing the DLL file and display its code in assembly language. This may take some time, so be patient.



  • When the analysis is done, you will see a window with a list of functions in the DLL file. Scroll down and look for a function named "_CheckKey@4". This is the function that checks the registration key.



Double-click on the function name to open it in a new window. You will see the assembly code of the function, which looks something like this:


push ebp mov ebp, esp sub esp, 0Ch mov eax, [ebp+8] mov [esp+4], eax mov [esp], offset a1234567890 ; "1234567890" call _strcmp test eax, eax jnz short loc_100010F9 mov eax, 1 jmp short loc_100010FB loc_100010F9: xor eax, eax loc_100010FB: mov esp, ebp pop ebp retn 4


This code may look complicated, but it is actually very simple. Here is what it does:


  • It takes one argument, which is the registration key entered by the user.



  • It compares it with the hardcoded key "1234567890" using the strcmp function.



  • If they are equal, it returns 1 (true). If they are not equal, it returns 0 (false).



Our goal is to change this code so that it always returns 1 (true) regardless of the input key.



Bypassing the Key Check




The fourth step is to bypass the key check by changing the code of the _CheckKey@4 function. To do this, we will use IDA Pro to edit the assembly code and patch the DLL file.


  • In the window where you opened the _CheckKey@4 function, right-click on the line that says "test eax, eax" and select "Edit" > "Patch program" > "Assemble".



  • A dialog box will appear with the current instruction in the text box. Delete it and type "mov eax, 1" instead. This will replace the instruction that tests the result of the strcmp function with an instruction that simply sets the value of eax to 1.



  • Click on "OK". You will see that the line has changed to "mov eax, 1" in the window.



  • Now, right-click on the next line that says "jnz short loc_100010F9" and select "Edit" > "Patch program" > "Assemble".



  • A dialog box will appear with the current instruction in the text box. Delete it and type "nop" instead. This will replace the instruction that jumps to a different location if the result of the strcmp function is not zero with an instruction that does nothing.



  • Click on "OK". You will see that the line has changed to "nop" in the window.



  • Repeat steps 5 and 6 for the next line that says "jmp short loc_100010FB". This will replace the instruction that jumps to a different location if the result of the strcmp function is zero with an instruction that does nothing.



  • You have just modified the code of the _CheckKey@4 function so that it always sets eax to 1 and does not jump to any other location. This means that it always returns 1 (true) regardless of the input key.




Saving and Replacing the DLL File




The fifth and final step is to save the modified DLL file and replace the original one in the CoreAVC installation folder. To do this, we will use IDA Pro to apply the patches and create a new DLL file.


  • In the window where you opened the _CheckKey@4 function, click on "Edit" > "Patch program" > "Apply patches to input file".



  • A dialog box will appear asking you to confirm the changes. Click on "Yes".



  • Another dialog box will appear asking you to create a backup file. Click on "Yes".



  • IDA Pro will create a new file named "CoreAVC.dll.bak" in the same folder as the original DLL file. This is the backup file that contains the original code of the DLL file.



  • Now, go to the CoreAVC installation folder and rename the original DLL file to something else, such as "CoreAVC.dll.old". This will prevent any conflicts with the modified DLL file.



  • Copy the modified DLL file from IDA Pro's folder to the CoreAVC installation folder. Make sure that it has the same name as the original DLL file, which is "CoreAVC.dll".



  • You have just replaced the original DLL file with the modified one that has the hack applied.



Testing and Enjoying Your Hacked CoreAVC




You have completed all the steps to hack CoreAVC Professional Edition v2.5.5.0. Now, it is time to test if your hack worked and enjoy your free video decoder.


  • Open CoreAVC and go to "Help" > "About". You will see a window that shows your registration information. You will notice that it says "Registered to: 1234567890". This means that your hack worked and CoreAVC is now registered with any key.



  • Now, you can use CoreAVC to decode and play high-quality videos with low CPU usage. You can also access all the features and settings of CoreAVC without any limitations.



  • To use CoreAVC, you need a media player that supports it, such as Media Player Classic or VLC. You can also configure CoreAVC to be your default video decoder for any media player that uses DirectShow filters.



  • To do this, go to "Start" > "All Programs" > "CoreCodec" > "CoreAVC Configuration". You will see a window that allows you to change various options for CoreAVC, such as video output, hardware acceleration, subtitles, and more.



  • Click on the tab that says "System Default". You will see a button that says "Set as Default Video Decoder". Click on it and confirm your choice. This will make CoreAVC your system default video decoder for any media player that uses DirectShow filters.



Congratulations, you have successfully hacked CoreAVC Professional Edition v2.5.5.0 and can now enjoy its benefits for free. You can now watch high-quality videos with low CPU usage and customize your video settings according to your preferences.



FAQs




Here are some frequently asked questions and answers related to hacking CoreAVC or using it for video decoding.


  • Q: Is hacking CoreAVC legal?



  • A: No, hacking CoreAVC is illegal and unethical, as it violates the terms and conditions of the software license agreement. You should only do this for educational purposes and at your own risk.



  • Q: Will hacking CoreAVC harm my computer or data?



  • A: Hacking CoreAVC may cause damage to your computer or data, as it involves modifying the DLL file and replacing it with a modified one. You should always backup your system and data before attempting to hack any software.



  • Q: What is the difference between CoreAVC and other video decoders?



  • A: CoreAVC is a video decoder that uses the H.264 codec, which is a standard for compressing and playing high-quality videos. CoreAVC is one of the fastest and most efficient video decoders available, as it uses low CPU resources and delivers high-quality output.



  • Q: What are the benefits of using CoreAVC for video decoding?



  • A: Using CoreAVC for video decoding has many benefits, such as:



  • It can decode and play high-definition videos with low CPU usage and power consumption.



  • It can support various video formats, such as MKV, MP4, AVI, MOV, etc.



  • It can provide hardware acceleration for supported graphics cards, such as NVIDIA, AMD, and Intel.



  • It can handle subtitles, aspect ratios, deinterlacing, and other video settings.



  • Q: How can I update CoreAVC to the latest version?



  • A: You can update CoreAVC to the latest version by visiting the official website of CoreCodec and downloading the latest installer. However, you should be aware that updating CoreAVC may undo your hack and require you to repeat the steps in this article.



I hope you found this article helpful and informative. If you have any questions or comments, feel free to leave them below. Thank you for reading and happy hacking!


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