Eh, how I missed this material in the beginning ...
Required:
Knowledge of C / C ++
Knowledge of WinAPI and its documentation
Knowledge of basic cryptology
Knowing the structure of the PE file
Knowledge of Windows (virtual) memory
Knowledge of processes and threads.
The two sides of...
Cryptor (from the English word "Cryptor" - cryptographer) is the name of one of the types of software products that are used by virus programmers in order to hide the malicious essence of the software they write from antivirus programs.
Cryptor, using encryption of a program containing a virus...
A cryptor is software designed to hide Trojans, bots and other evil spirits from being detected by antiviruses.
Криптор - это софт, который предназначен для скрытия троянов, ботов и прочей нечисти от детектирования антивирусами.