You run the target software. It asks for "Name" and "Serial." You type John and 12345 . Click "Verify." It returns: "Invalid Serial. Try again."
If the JNZ (Jump if Not Zero) jumps to success, but the software fails, it means EAX is zero. Cracking Software Practicals -csp-
Distributing a cracked .exe or a keygen violates the DMCA (Section 1201) and Computer Fraud and Abuse Act (CFAA). You run the target software
Using techniques, you extract this algorithm. You realize the serial must be the ASCII sum of the name multiplied by 1337. but the software fails
int valid_serial = sum * 1337; if (atoi(serial) == valid_serial) return 1; else return 0;