Internet crime has matured into an underground economy where criminals trade in data, knowledge, and services specifically geared towards defrauding users and businesses. Criminals buy and sell compromised machines, scam hosting, exploit kits, and wholesale access to pilfered user records including usernames and passwords, credit card numbers, and other sensitive personal data. In the end, abuse propped up by cost-ineffective resources will crumble, authors say. The full report was presented in June at the Workshop on the Economics of Information Security 2015.”]
Source: https://security.googleblog.com/2015/09/new-research-underground-market-fueling.html