Microsoft’s Digital Crimes Unit discovered and helped take down a botnet of 400,000 compromised devices controlled with the help of an LED light control console. The botnet was used by the threat actors who controlled it for a wide variety of purposes ranging from phishing campaigns, malware distribution, ransomware payloads delivery, and launching distributed denial-of-service attacks. Microsoft’s DCU team has taken down 22 botnets so far since 2010 with help of ISPs, domain registries, government CERTs, and law enforcement agencies from across the world.
Source: https://www.bleepingcomputer.com/news/security/microsoft-helped-stop-a-botnet-controlled-via-an-led-light-console/