Domain Generation Algorithm Dga
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Domain generation algorithms dga is a methodology for malware to form a command and control c c c2 connection without being detected.
Domain generation algorithm dga. A domain generating algorithm dga is a program or subroutine that provides malware with new domains on demand or on the fly. Domain generation algorithm dga what is it. Attackers developed dgas so that malware can quickly generate a list of domains that it can use for the sites that give it instructions and receive information from the malware usually referred to as command and control or c2.
Both malware instances spread on various devices and the hacker controlled software should be able to run the algorithm and produce the same values at a given time. Read about the typical components of a dga and go in depth with 8 real world examples. A domain generation algorithm or dga is a computer program used to create domain names typically for the purpose of propagating remotely controlled web based malware.
In contrast dgas use algorithms to periodically generate a large number of domain names which function as rendezvous points for malware command and control servers mitre att ck t1568 002. For a dga to be functional idempotence on domain generation is required. The use of public key cryptograph.
In a recent discovery the reddrip team was able to begin to decode the domain generation algorithm used in the solarwinds compromise. Dgas were invented to avoid network detection and mitigation techniques this is because a predefined list of domain names can be easily discovered with a strings command while we actually have to reverse engineer the malware sample that uses a dga algorithm and reverse engineer the algorithm used to generate domain names in order to be able to block them with firewall blacklists. Domain generation algorithms 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.
Later that year conficker made dga a lot more famous. But it s a proven technique that enables modern malware to evade security products and counter measures. What are domain generation algorithms dgas.
Dga is a technique that fuels malware attacks. Dga by itself can t harm you. A domain generation algorithm is a program that is designed to generate domain names in a particular fashion.