As part of a major cybersecurity research project, security researchers have analyzed 4.4 million malware samples that have been detected between 2007 and 2018. About one million of these samples were cryptomining malware.

Based on their findings, the researchers estimate that about 4.32% of all Monero cryptocurrency that has been mined so far, was brought into circulation by malware botnets and cybercriminals. This equates to almost $57 million in cryptocurrency.

Read more: Over 4 percent of all Monero was mined by malware botnets