1. http://www.securityweek.com/blackenergy-killdisk-infect-ukrainian-mining-railway-systems
2. Biggs, J.: Hackers release source code for a powerful DDoS app called Mirai. TechCrunch, 10 October 2016. Accessed 19 Oct 2016
3. https://www.fireeye.com/blog/threat-research/2014/10/apt28-a-window-into-russias-cyber-espionage-operations.html
4. https://www.fireeye.com/blog/threat-research/2017/05/smb-exploited-wannacry-use-of-eternalblue.html
5. Internet Security Center Qihoo 2015. 2014 Internet Security Research Report in China. http://zt.360.cn/report/