Again and again and again… That’s what comes to my mind every time when I see a new variant of the Kavo family and, most recently, also the Hilot family. These malware samples are machine-generated and their authors can develop a “completely new” set of samples based on a simple change made to the generator itself. What’s the problem here? These changes are not random as we earlier thought, they’re precisely targeted against the most popular AV engines.

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