Effective and Efficient Android Malware Detection and Category Classification Using the Enhanced KronoDroid Dataset

Android is the most widely used mobile operating system and responsible for handling a wide variety of data from simple messages to sensitive banking details. The explosive increase in malware targeting this platform has made it imperative to adopt machine learning approaches for effective malware detection and classification. Since its release in 2008, the Android platform has changed substantially and there has also been a significant increase in the number, complexity, and evolution of malware that target this platform. This rapid evolution quickly renders existing malware datasets out of date and has a degrading impact on machine learning-based detection models. Many studies have been carried out to explore the effectiveness of various machine learning models for Android malware detection. Majority of these studies use datasets that have compiled using static or dynamic analysis of malware but the use of hybrid analysis approaches has not been addressed completely. Likewise, the impact of malware evolution has not been fully investigated. Although some of the models have achieved exceptional results, their performance deteriorated for evolving malware and they were also not effective against antidynamic malware. In this paper, we address both these limitations by creating an enhanced subset of the KronoDroid dataset and using it to develop a supervised machine learning model capable of detecting evolving and antidynamic malware. The original KronoDroid dataset contains malware samples from 2008 to 2020, making it effective for the detection of evolving malware and handling concept drift. Also, the dynamic features are collected by executing the malware on a real device, making it effective for handling antidynamic malware. We create an enhanced subset of this dataset by adding malware category labels with the help of multiple online repositories. Then, we train multiple supervised machine learning models and use the ExtraTree classifier to select the top 50 features. Our results show that the random forest (RF) model has the highest accuracy of 98.03% for malware detection and 87.56% for malware category classification (for 15 malware categories).