As the population of mobile users grows rapidly, mobile malware targeting smartphones are becoming a new threat to homeland security. So far, many kinds of malicious malwares including monetizing, stealing credentials or rooting have emerged. The latest mobile malwares are especially posing a serious threat to homeland security, because they can zombify phones to be controlled by their command and conquer servers. In this paper, we survey the threats and malicious behaviors of current mobile malwares. Then, we study the defense mechanisms of mobile malware and introduce a cooperative system for mobile security in South Korea. We also discuss the possible future of mobile malware and attack techniques.