The latest version of Mirai is Wicked.
Fortinet has found a new variant of the Mirai Internet-of-things botnet in the wild. Called "Wicked," this variant has three modules: "Scanner," "Attack," and "Killer." Unlike the original Mirai, which brute-forced its way into vulnerable connected devices, Wicked makes use of known exploits to establish access. It scans ports to establish a connection with its targets and uses an exploit appropriate to that connection. Wicked seems to be the work of the same coder who produced the Sora, Owari, and Omni botnets (SecurityWeek).