What Is a Domain Generation Algorithm (DGA)?

If you have been following the news in the world of Cybersecurity lately, you’ve probably seen, heard, or read a thing or two about SolarWinds, FireEye, or Microsoft amongst many others being targeted by an unknown threat actor. While not the first, this threat actor uses an interesting algorithm to generate sub-domains for its SUNBURST malware to pull down the next stage of execution on the target systems.