1. Computer Networks: A Top-Down Approach;Forouzan,2012
2. A brief study of Wannacry threat: Ransomware attack 2017;Mohurle;Int. J. Adv. Res. Comput. Sci.,2017
3. Leaks and ransoms — the key threats to healthcare organisations;Mansfield-Devine;Netw. Secur.,2017
4. The Art of Computer Virus Research and Defense;Szor,2005
5. The impact of countermeasure propagation on the prevalennce of computer viruses;Chen;IEEE Trans. Syst. Man Cybern. B,2004