Attackers do this because security software and vendors act quickly to block and take down malicious domains that malware uses. Domain generation algorithms (DGA) are algorithms seen in various families of malware that are used to periodically generate a large number of domain names that can be used as rendezvous points with their command and control servers.Īttackers use DGA so that they can quickly switch the domains that they’re using for the malware attacks. Instead of including a hardcoded domain, this type of malware generates new domain names every few days or so, based on the current date. Identifying algorithmically generated domains in network traffic is a key aspect for analyzing, detecting and mitigating botnet behaviorĪ typical form of command and control traffic makes use of domain generation algorithms (DGAs) to avoid signature based detection. DNS is probably the best source of data for detecting an attacker’s command and control activity, which can be isolated by looking at outbound DNS requests.īotnets play an important role in malware distribution and they are widely used for spreading malicious activities in the Internet.
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