Researchers at Fortinet have discovered the OMG botnet, the first Mirai variant that sets up proxy servers on the compromised IoT devices. The Mirai botnet was first spotted in August 2016 by the security researcher MalwareMustDie, it was specifically designed to compromise vulnerable or poorly protected IoT. The name Mirai was given to the bot because of the strings /bin/busybox MIRAI and MIRAi: applet not found, which are commands to determine if it has successfully brute-forced its way into the targeted IoT device.”]
Source: https://securityaffairs.co/wordpress/69449/malware/omg-botnet.html