With increasing adoption of 64-bit systems, malware authors started to adapt their code to target these platforms. New variants of Kivars, an older piece of malicious software written for 32-bit, have been discovered to show a preference for the 64-bit machines, too.Security researchers at TrendMicro have analyzed fresh samples of the malware and found that it has slight differences compared to the regular 32-bit releases.The functionality remains the same, Kivars being able to download and up…