As time goes by, vulnerabilities in various products emerge in an endless stream, and the malwares used for attacks are also varied. We collected and analyzed the malicious traffic generated in Taiwan, and especially found several vulnerabilities that attackers often exploit. In addition, we conducted a complete analysis of the malwares that attackers sent in these malicious traffic to control and compromise the target environment. We identified various types of variants and found common characteristics among these malicious programs, such as subsequent triggered attacks or methods of persistence in the target environment, etc.