Specialists Malwarebytes published a report according to which the number of incidents of crypto-jacking for the first quarter of 2018 increased by 4000% compared to the same period last year. But the attacks of extortion programs on the contrary went to decline, their number decreased by 35%. The company presented an interesting infographics. For example, in the graph below you can estimate the number of malicious mining detections that attacked ordinary users. Compare the fourth quarter of last year and the first of this year.