Trend Micro report shows that Chinese cybercrime underground activity doubled between 2012 and 2013. The Chinese underground is largely focused on mobile device/services attacks and charges customers a premium for that work. SMS spamming, premium service numbers and SMS servers are the most sought mobile crime products and services. The communication tool of choice is QQ groups, a feature of the QQ instant messaging app. Unlike most organized criminals in Eastern Europe, who often rigorously vet customers before working with them, these groups make themselves quite available to the general public.”]