One of the reasons behind the increase in Mac related Malware attacks is the fact that Apple products are popular with many prominent businessmen and influential politicians.
Daniel Pistelli, Reverse Engineer and lead developer of Cerbero Profiler, former developer of IDA Pro comes up with another interesting research, and explained the basic details behind the technique he used to create an undetectable malware for Mac OS X.
Apple implements internally an encryption mechanism to protect some of their own executable like "Dock.app" or "Finder.app". This encryption can be applied to malware as well. If one does, anti-malware solutions can no longer detect the malware because of the encryption, but OS X has no problem loading such malware.
This same protection mechanism can be used on existing malwares that are already detected by Anti-malware products, to make them completely undetectable. Those same anti-malware products can no longer detect the malware because they don't understand it's encrypted.
