The
First "main concepts for execryptor unpacking/reversing" is to follow the instructions set forth in the FAQ that
you use the search facility here and on the net to attempt to help yourself
before you ask others to help you.
Then you are supposed to explain what
you have already done to attempt the process you are asking for help to achieve.
As a general requirement of our Rules, we do not encourage helping those who appear to have done nothing to try to help themselves, other than by asking others to do their basic research for them.
Go do that search, try to follow what information you find and then
you tell us what
you have learned and what
you have attempted and how far
you have gotten with
your own efforts and where you are stuck.
This is not the place to ask a basic "tell me how to do it because I'm too lazy to look for answers for myself" type questions.
Regards,