I would like to mention WireShark as the one of the most powerful network sniffers in the field.
This is very useful tool for discovering which functions (APIs) are called by the analyzed software development Malaysia and what behavior it expects from that functions. This tool has a powerful database and allows you to see calls to the huge amount of API functions of not only kernel32 and ntdll but also COM, managed environment, etc. ApiMon provides very convenient mechanisms for filtering.
If you develop the software, you cannot overestimate the profit from using a debugger and ability to see what’s program doing right now. The same benefit you get while debugging the live applications that you are trying to reverse. So which debugger may be useful in reversing?
There are a lot of them, but the most popular are OllyDBG and WinDBG.
OllyDBG is probably the best debugger that you can find in terms of software development Malaysia reverse engineering. It was built basically for reversing needs and it has all needed tools for that – you have the built-in disassembler with the ability to analyze and identify some key data structures, import and export analysis feature, built-in assembling and patching engine, etc. Availability of parsing the API functions and their parameters makes it very easy to reverse the interaction with the system. The stack view is showing a lot of information about call stack. One more important advantage is that you may use it with the applications that are debug-protected – the situation where the usual debuggers just can’t do anything.
Despite its pretty simple interface, Windbg has very powerful tools for debugging. It has built-in disassembler, big amount of different commands, which allow you to know almost everything about the process/system that you are debugging in and, of course, probably the most valuable thing is availability of the kernel-mode debugging, what is the big advantage to reverse engineer drivers, kernel-mode drivers in particular.