Malware Sampling site

http://www.malware-traffic-analysis.net/training-exercises.html

http://contagiodump.blogspot.kr/

http://malware.dontneedcoffee.com/

site list site https://zeltser.com/malware-sample-sources/

 https://github.com/ytisf/theZoo/tree/master/malwares/Source/Original

Ransomware history
http://www.csoonline.com/article/3095956/data-breach/the-history-of-ransomware.html