“‘I imagine it will hit into the millions of dollars, if they are able to infect some of the right types of targets in an enterprise environment,’ said Devost.
Like smart start-up CEOs, the hackers are testing the market and refining the business model. As the vast majority of attacks are likely settled without going public, more research is needed to figure out just how profitable the business really is, said experts. Unlike the criminal networks, which often share information freely, many of the victims do not.”

Source: Ransomware: Lucrative, fast growing, hard to stop