A report published by Cyber Threat Alliance (CTA), a collaborative group of cybersecurity researchers, found that cryptocurrency mining malware has increased 459 percent since 2017.
Cryptojacking occurs when cybercriminals infect a computer with cryptomining malware so that they can use the computer's processing power to mine cryptocurrency for themselves. Cryptocurrency is decentralized digital currency. It only exists on computers, and not a central computer or server. It is distributed across a network of thousands of computers.
The exploit Eternalblue was used in the WannaCry and NotPetya attacks and has contributed to the rise in cryptojacking over the past year. The exploit takes advantage of a vulnerable Windows network file sharing protocol. Microsoft released a patch, but many Windows operating systems are still vulnerable.
Hackers are also modifying existing malware to mine cryptocurrency. For example, cybercriminals are using BlackRuby ransomware to mine Monero by adding XMRig software to. Hackers have also turned the Mirai botnet into an IoT-mining botnet. Aditi Hudli "Report Finds Cryptojacking Instances Jumped 400% In A Year" coindesk.com (Sep. 21, 2018).