Enhancing Classification Performance for Android Small Sample Malicious Families Using Hybrid RGB Image Augmentation Method

With the improvement of computer computing speed, many researches use deep learning for Android malware detection. In addition to malware detection, malware family classification will help malware researchers understand the behavior of the malware families to optimize detection and prevent However, the new malware family has few samples, which lead to bad classification results. GAN-based method can improve the classification results, but minor data will still lead to the unstable quality of the data generated by the deep learning augmentation method, which will limit the improvement of classification results. In the study, we will propose a hybrid augmentation method, first extracting malware features and converting them into RGB images, and then the minor families will augment by the gaussian noise augmentation method, and then combined with the deep convolutional generative adversarial network (DCGAN) which have better effect on image augmentation, and finally input to CNN for family classification. The experimental results show that using the hybrid augmentation method proposed in the study, compared to no augmentation and augmentation with only using the deep convolutional generative adversarial network, the F1-Score increased between 7%~34% and 2%~7%.