Unpack Enigma 5.x

Enigma employs several aggressive anti-reverse engineering techniques that must be bypassed before the OEP can be found. It frequently uses timing checks to detect if it is running under a debugger. If the execution speed is too slow—typical of a human stepping through code—the process will terminate or crash. Furthermore, Enigma utilizes hardware breakpoint detection and "self-checksumming" routines. If you modify a single byte of the protected code to set a software breakpoint (INT 3), the protector will detect the change and refuse to execute.