Domain Generation Algorithm Dga
More And More Malware Is Being Created With Advanced Blocking Circumvention Techniques One Of The Most Prevalent Techniqu Computer Security Malware Tech Hacks
More And More Malware Is Being Created With Advanced Blocking Circumvention Techniques One Of The Most Prevalent Techniques Being Used Is The Use Of Domain Gen
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Dga is a technique that fuels malware attacks.
Domain generation algorithm dga. They only show the seeding part of the domain generation algorithm however the listing of generated bazar domains matches the algorithm in this blog post apart from the first two domains alztwfdicu bazar and ocgjqlaspr bazar which are hardcoded. The program defines a function with the same name generate domain which accepts current year month which influence the domain generation algorithm the function reserves some space on the stack for the domain variable which is 25 bytes long so it can hold the actual. A different list of domains can be generated every day all with unique pseudo random alphanumeric names. 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 the large number of potential rendezvous points makes it difficult for law enforcement to effectively shut down botnets since infected computers will attempt to.
For a dga to be functional idempotence on domain generation is required. Domain generation algorithm dga using the date and a seed number a dga generates domains to which an infected computer connects. I ve also written a c program that uses the same dga algorithm for generating the domain names which can be seen below. Attackers use dga so they can quickly switch the command and control also called c2 or c c servers that they.
As these dgas become more sophisticated and increasingly difficult to detect zvelo s cyber threat intelligence team is recommending heightened awareness as they anticipate this to be a prominent. The article shows that the dga is part of bazar loader which will try to download bazar backdoor. A basic implementation uses 3 specific parts. But it s a proven technique that enables modern malware to evade security products and counter measures.
A domain generating algorithm dga is a program or subroutine that provides malware with new domains on demand or on the fly. Dga by itself can t harm you. 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. Kraken was the first malware family to use a dga in 2008 that we could find.
There are many algorithms that are used to generate domains but many of these algorithms are simplistic and are very easy to detect using classical machine learning techniques. Domain generation algorithms dgas are frequently used to generate large numbers of domains for use by botnets. Over the last decade domain generation algorithms dgas have become a popular tool for threat actors to deliver malware as it has become a difficult technique for defenders to counter attacks. 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.
Fortunately there are emerging technologies now that can better counter dgas. Domain generation algorithm dga what is it.
