A new botnet is actively targeting IoT devices using payloads compiled for a dozen CPU architectures and uses them to launch several types of DDoS and to spread various types of malware. The Dark Nexus botnet as it was named by the Bitdefender researchers who discovered it has gone through a very fast development process since it was initially spotted. Around 40 different versions (from version 4.0 to 8.6) have been released between December 2019 and March 2020. The malware is probably created by a known botnet developer who advertises and sells DDoS services and botnet code since 2017.
Source: https://www.bleepingcomputer.com/news/security/new-iot-botnet-launches-stealthy-ddos-attacks-spreads-malware/