One of the most important “innovations” in malware in the past decade is what’s called a Domain Generation Algorithm (“DGA”)”. DGA is an automation technique that attackers use to make it harder for defenders to protect against attacks. While DGA has been in use for over 10 years now, it’s still a potent technique that has been a particular challenge for defenders to counter. Fortunately, there are emerging technologies now that can better counter DGAs.

https://unit42.paloaltonetworks.com/threat-brief-understanding-domain-generation-algorithms-dga/