Robust IoT Malware Detection and Classification Using Opcode Category Features on Machine Learning

Technology advancements have led to the use of millions of IoT devices. However, IoT devices are being exploited as an entry point due to security flaws by resource constraints. IoT malware is being discovered in a variety of types. The purpose of this study is to investigate whether IoT malware can be detected from benign and whether various malware family types can be classified. We propose fixed-length and low-dimensional features using opcode category information on ML models. The binary IoT dataset for this study is converted into opcode to create features. The opcodes are categorized into 6 or 11 according to their functionality. Features are created using a sequence of opcode categories and the entropy values of opcode categories. These features can be visualized by using a 2D image in order to observe patterns. We evaluate our proposed features on various ML models (5-NN, SVM, Decision Tree, and Random Forest) and MLP with various performance metrics, such as Accuracy, Precision, Recall, F1-score, MCC, AUC-ROC, and AUC-PR. The performance results for malware detection and classification have an accuracy over 98.0%. The experiments have demonstrated that the features we've proposed are effective and robust for identifying different types of IoT malware and benign.