More recently, cyber security experts concluded that the most famous virus WannaCry, which in a matter of time struck hundreds of thousands of computers, was created by the craftsman from South China. In just one month, there were recorded attacks in 74 countries, according to May, more than 700,000 computers were blocked, and for the very removal of the lock the virus required up to $ 600. Because of the virus attacks, not only large corporations were affected, but work was also stopped at many airports and hospitals. It was after such a massive attack that an update for windows was released, which should protect users from attacks, in just a couple of weeks the hacker managed to get more than $ 500,000 in this way, the attacks continue to this day!