The popularity of legitimate cryptomining is being challenged by the rise of cryptojacking — it’s criminal cousin. The earning potential of a successful cryptojacking attack has made it an attractive pursuit for bad actors — an article in ZDNet even names 2018 as the “year of malicious cryptocurrency mining attacks,” referring to it as  the “new ransomware.” This is because, while cryptojacking and ransomware are both for financial profit, cryptojacking is not overtly disruptive — providing long-term earning potential for the attacker.

https://www.crowdstrike.com/blog/whats-in-your-wallet-resource-draining-cryptojacking-attacks-are-on-the-rise-2/