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This tutorial demonstrates how to use API Monitor to crack copy protected software. Software cracking is the modification of software to remove or disable features which are considered undesirable by the person cracking the software, usually related to protection methods: copy protection, trial/demo version, serial number, hardware key, date checks, CD check or software annoyances like nag screens and adware – Wikipedia For this tutorial we will be using Mirial Softphone which is a HD video conferencing application. This tutorial is for educational purposes only, so please do not use this to create or distribute a cracked copy of the software. When you first install the application, it prompts you for a license file.

After installing the license you have 30 days to evaluate the application. The expiration date is displayed on this screen; in our case it is March 15, 2011. Step 1 Trial applications usually store license information in either the registry or on the file system. Since this application prompted us for a license file, we know that it uses the file system. Start up the 32-bit version of API Monitor and enable API’s from the File Management category.

Step 2 Select Hook Process from the File menu to start monitoring the application. API Monitor will start monitoring and displaying API calls. The application should now display a message indicating that it is an evaluation version.

Hit cancel to quit the application. Step 3 Now that we have captured the API calls made by the application, we need to find the one that reads the license file. Scan through the calls in the API summary view until you find the right one.

The application is reading from mirial.lic file. The name suggests that it might be a license file, so let’s open it up. We’ve located the license file and it has the expiration date in it. Step 4 Modify the expiration date in the license file to 2012-03-15 and save the file. Now launch the application again.

The application should now display an error indicating that the license is invalid. Hit cancel to quit the application. Step 5 Our next step is to start debugging the application right after it has read the license file. From Step 3, we know that the application uses CreateFileA to open the file and ReadFile to read the file. Setup a Breakpoint on CreateFileA and launch the application in API Monitor.

The breakpoint will be hit multiple times; continue until you reach the one that opens the license file. Switch back to API Monitor and enable a post-call breakpoint on the ReadFile API and disable the CreateFileA breakpoint. Now hit Continue to let the application run. API Monitor should now display the ReadFile breakpoint.

Now hit the Break button to have API Monitor generate a breakpoint in the application. You should now be able to attach to the application using a debugger. Step 6 Your debugger should now display disassembled instructions from the application If you look at the call stack, you’ll notice that the current frame is in apimonitor-drv-x86.sys. Use the debugger to step out until you reach code in the application. Step 7 The debugger is currently at a location right after the application has finished reading the license file and before it checks the validity of the license. We need to locate the code that performs this check and disable it.

The most common software crack is the modification of an application’s binary to cause or prevent a specific key branch in the program’s execution. This is accomplished by reverse engineering the compiled program code using a debugger such as SoftICE, OllyDbg, GDB, or MacsBug until the software cracker reaches the subroutine that contains the primary method of protecting the software (or by disassembling an executable file with a program such as IDA). The binary is then modified using the debugger or a hex editor in a manner that replaces a prior branching opcode with its complement or a NOP opcode so the key branch will either always execute a specific subroutine or skip over it. – Wikipedia Stepping though some of the code, we come across this location which looks like a possible match to the code we’re looking for.

Step 8 The value of register eax is 0, right after the function call. Let’s modify the value to 1 and continue running the application. The application displays a different error message this time; instead of an invalid license, the application is telling us that it is unable to locate the file. Step 9 Now that we have pinpointed the location where the application checks for a valid license, all we need to do is to play around with the values and jmp instructions to find one that works.

In this case, inverting the jump instruction from je to jne tells the application that it has a valid license file. Running the application with the modified code displays our new expiration date of March 15, 2012. Discuss this article here: http://www.rohitab.com/discuss/topic/37059-using-api-monitor-to-crack-co... CGI Scripts CGI-Telnet TrãnsLìngö Community Discussion Forums IRC Chat Pastebin Software API Monitor Boss! FreeVoice Password Decrypter Source Codes BlackBat Virus SEH in Assembly Shadow Virus Forum Posts Hello I m new and looking to learn from the community Is it worth it to code a driver? How to get ISP Carrier name like Comcast , AT&T from incoming packet What you Listened today, Megathread Best Screen Recording Tools? How to configure vuforia for android ?

API Monitor v2-r13 - Save Capture, View Asynchronous I/O Buffers, Monitor Windows 8 Metro applications, 2500 new API s and 500 COM Interfaces This tutorial demonstrates how to use API Monitor to crack copy protected software. Software cracking is the modification of software to remove or disable features which are considered undesirable by the person cracking the software, usually related to protection methods: copy protection, trial/demo version, serial number, hardware key, date checks, CD check or software annoyances like nag screens and adware – Wikipedia For this tutorial we will be using Mirial Softphone which is a HD video conferencing application. This tutorial is for educational purposes only, so please do not use this to create or distribute a cracked copy of the software. When you first install the application, it prompts you for a license file.

After installing the license you have 30 days to evaluate the application. The expiration date is displayed on this screen; in our case it is March 15, 2011. Step 1 Trial applications usually store license information in either the registry or on the file system. Since this application prompted us for a license file, we know that it uses the file system. Start up the 32-bit version of API Monitor and enable API’s from the File Management category. Step 2 Select Hook Process from the File menu to start monitoring the application.

API Monitor will start monitoring and displaying API calls. The application should now display a message indicating that it is an evaluation version. Hit cancel to quit the application. Step 3 Now that we have captured the API calls made by the application, we need to find the one that reads the license file.

Scan through the calls in the API summary view until you find the right one. The application is reading from mirial.lic file. The name suggests that it might be a license file, so let’s open it up. We’ve located the license file and it has the expiration date in it. Step 4 Modify the expiration date in the license file to 2012-03-15 and save the file. Now launch the application again.

The application should now display an error indicating that the license is invalid. Hit cancel to quit the application. Step 5 Our next step is to start debugging the application right after it has read the license file. From Step 3, we know that the application uses CreateFileA to open the file and ReadFile to read the file.

Setup a Breakpoint on CreateFileA and launch the application in API Monitor. The breakpoint will be hit multiple times; continue until you reach the one that opens the license file. Switch back to API Monitor and enable a post-call breakpoint on the ReadFile API and disable the CreateFileA breakpoint. Now hit Continue to let the application run. API Monitor should now display the ReadFile breakpoint.

Now hit the Break button to have API Monitor generate a breakpoint in the application. You should now be able to attach to the application using a debugger. Step 6 Your debugger should now display disassembled instructions from the application If you look at the call stack, you’ll notice that the current frame is in apimonitor-drv-x86.sys. Use the debugger to step out until you reach code in the application.

Step 7 The debugger is currently at a location right after the application has finished reading the license file and before it checks the validity of the license. We need to locate the code that performs this check and disable it. The most common software crack is the modification of an application’s binary to cause or prevent a specific key branch in the program’s execution. This is accomplished by reverse engineering the compiled program code using a debugger such as SoftICE, OllyDbg, GDB, or MacsBug until the software cracker reaches the subroutine that contains the primary method of protecting the software (or by disassembling an executable file with a program such as IDA). The binary is then modified using the debugger or a hex editor in a manner that replaces a prior branching opcode with its complement or a NOP opcode so the key branch will either always execute a specific subroutine or skip over it.

– Wikipedia Stepping though some of the code, we come across this location which looks like a possible match to the code we’re looking for. Step 8 The value of register eax is 0, right after the function call. Let’s modify the value to 1 and continue running the application. The application displays a different error message this time; instead of an invalid license, the application is telling us that it is unable to locate the file. Step 9 Now that we have pinpointed the location where the application checks for a valid license, all we need to do is to play around with the values and jmp instructions to find one that works. In this case, inverting the jump instruction from je to jne tells the application that it has a valid license file.

Running the application with the modified code displays our new expiration date of March 15, 2012. Discuss this article here: http://www.rohitab.com/discuss/topic/37059-using-api-monitor-to-crack-co... CGI Scripts CGI-Telnet TrãnsLìngö Community Discussion Forums IRC Chat Pastebin Software API Monitor Boss! FreeVoice Password Decrypter Source Codes BlackBat Virus SEH in Assembly Shadow Virus Forum Posts Hello I m new and looking to learn from the community Is it worth it to code a driver? How to get ISP Carrier name like Comcast , AT&T from incoming packet What you Listened today, Megathread Best Screen Recording Tools? How to configure vuforia for android ? API Monitor v2-r13 - Save Capture, View Asynchronous I/O Buffers, Monitor Windows 8 Metro applications, 2500 new API s and 500 COM Interfaces PC & Mobile Windows Mac Linux Android iPhone and iPad Internet Security Technology News Lifestyle Entertainment Productivity Creative Gaming Browsers Social Media Finance Self Improvement Hardware Technology Explained Buying Guides Smart Home DIY Product Reviews Deals Giveaways Top Lists About About MakeUseOf Newsletter Advertise Privacy Jobs Chats PC & Mobile Windows Mac Linux Android iPhone and iPad Internet Security Technology News Lifestyle Entertainment Productivity Creative Gaming Browsers Social Media Finance Self Improvement Hardware Technology Explained Buying Guides Smart Home DIY Product Reviews Deals Giveaways Top Lists About About MakeUseOf Newsletter Advertise Privacy Jobs Chats Facebook Facebook Facebook Facebook I think crackers are able to understand and find the algorithm used for license generation.

Hence, using the same they develop the keygen. Found some links. Follow/read at ur own risk http://www.scribd.com/doc/3042847/Hack-how-to-create-keygens http://www.governmentsecurity.org/forum/topic/19655-string-pattern-how-t... Software geeks use an original key to fool the program that the user has entered a valid key, but when the program tries to register online, they crack it. Actually the program has to download new versions of a file or two which the user replaces with the crack file, the program thinks its already register. In other cases, they modify some files, so the program thinks that it doesn t has to register online.

I don t know if you can generate keys, but to think about it, if you could do it, you wouldn t ask such a question. (No Offence

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More crack software download, cracked, free software download, full version, download free software, patch, activator, serial, portable, mediasoftwarezz Full Version Software Crack Patch Serial Keys License Numbers This tutorial demonstrates how to use API Monitor to crack copy protected software. Software cracking is the modification of software to remove or disable features.

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