Ransomware has become one of the most popular tools used by hackers to extort companies for millions of dollars. And this is getting more advanced with the growth of artificial intelligence. CNBC's Tom Chitty and Arjun Kharpal unearth how these attacks take place and how hackers are getting smarter with AI.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.