Themida 184.108.40.206 + XBundler + LICENSE KEY
When an application is being created, the Compiler will compile the application source code into several object files made of machine language code. Then the object files are linked together to create the final executable.
Figure 1: Compilation of your source code
In the same manner that the source code of an application is converted into machine code at compilation time, there are tools that can convert a compiled application into assembly language or a higher programming language. These tools are known as dissemblers and de-compilers.
Figure 2: Decompilation of your application
An attacker can use a dissembler or de-compiler to study how a specific application works and what a specific routine does. When the attacker has a good knowledge of the target application, he can modify the compiled application to alter his behavior. For example, the attacker could bypass the routine that checks for the trial period in an application and make it run forever or even worse, cause the application to behave as if it was registered.
Software protectors where created to keep an attacker from directly inspecting or modifying a compiled application. A software protector is like a shield that keeps an application encrypted and protected against possible attacks. When a protected application is going to be run by the operating system, the software protector will first take control of the CPU and check for possible cracking tools (dissemblers or de-compilers) that may be running on the system. If everything is safe the software protector will proceed to decrypting the protected application and giving it the control of the CPU to be executed as normal.
The advantages of using a Software Protector are:
- Protect an application against piracy.
- Prevents attackers from studying how an application is implemented.
- Will not allow attackers to modify an application to change its behavior .
Since software protectors were born, many attackers have centered most of their efforts on attacking the software protectors themselves instead of the applications. Many tools have been developed that aid in the attacking of software protectors. These attacks often result in the attacker obtaining the original application that is decrypted and has the protection wrapper removed.
Figure 3: Common software protectors philosophy
The main problem with software protectors is that they use protection techniques very well known by crackers, so they can be easily bypassed with traditional cracking tools.
Another important problem in software protectors is that they have restricted execution by the operating system, that is, they run with normal application privileges. Because of this attackers can use cracking tools that run at the same priority level as the operating system allowing them to fully supervise what a software protector is doing at a certain time and attack it in specific places.
With Themida® , we have centered in the main weakness that software protectors have thus providing a complete solution to overcome those problems. Themida® uses the SecureEngine® protection technology that, when running in the highest priority level, implements never seen before protection techniques to protect applications against advanced software cracking.
Figure 4: Themida® protection procedure
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SecureEngine® defeats all current cracking tools that can be used against protected applications and it will make sure that your protected applications are only run in safe environments.
Figure 5: SecureEngine® technology adds more strength to the existing protection
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Software protection programming is not a very well known field for most programmers. Software protection techniques are not like "visible" features that can be seen and compared. Because of this most software protection authors could talk about impressive techniques that are included deep inside the protection scheme, when many times most of these techniques hardly exist or they are much simpler than what they seem.
Most software protectors reiterate a lot about using very strong cryptographic algorithms like RSA, Elliptic curves and AES hoping that the final user will believe that those protectors and the cryptic algorithms are unbreakable. This if far from the truth as software protection is very different from data protection. Even if a software protector encrypts the protected application with the most robust cryptographic algorithm, sooner or later the protected application needs to be decrypted in order to be run by the CPU. It is in this phase when most attackers will start their work by dumping the decrypted application from memory to disk thus not having to deal with the cryptographic algorithm and reconstructing of the original application.
In Themida® we want to be realistic about which weakness can be exploiting by attackers and what we really need to pay attention to protect an application with the highest security possible against software cracking.
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