You are right, cyber security is a real concern, but not only for developing nations. We can see every day that even the most developed nations have big problems with cyber crime. Countries develop strategies, policies, methodologies and implement them in practice, but nevertheless there is a huge cyber security concern. It is very important that countries collaborate and try to fight cyber crime together, because it is a global issue.
I will be conducting a research on cyber-security in South Africa, i guess as part of the developing nations the elected country fits well within your "developing nations". At the end of the research in 2020 i intend to have an appropriate answer in this regard.
Let me first say that I am not sure of what you mean by "controlling cybersecurity in developing nations," but will provide some comments that might help answer your question.
Your comments and the responses pique the notion of how cybersecurity might be perceived differently between the North and Southern states. Also how an effective cybersecurity framework might be implemented in developing nations where the resources might be more limited. It would seem that such study might identify any of these distinctions and the extent to which they might persist. It is in these distinctions that you might find where the major risks lay and the associated gaps.