It’s not clear how much Monero the managed to generate, but crypto mining schemes have been coming into vogue among cybercriminals. The Smominru botnet, which infected more than half a million machines, has made up to $3.6 million worth of Monero since May, Proofpoint reported.

Last week, a Monero botnet showed up in China and South Korea, infecting Android devices through port 5555, which is associated with the OS’s Debug Bridge tool.