iMCircle: Automatic Mining of Indicators of Compromise from the Web

With the rapidly evolving landscape of cyber threats, Indicators of Compromise (IOCs) are aggressively exchanged as forensic artifacts to help security professionals quickly identify and response cyber threats. Previous related studies mostly focus on extracting and generating IOCs from some fixed-point monitoring data sources, which are passive and time-consuming. In this paper, we present iMCircle, an innovation system that automatically mines IOCs from the Web by checking suspicious indicators with the help of open-source threat information. Based on the initial input of several suspicious indicators, iMCircle first collects their relevant public threat information from the Web and generates IOCs by checking whether those indicators are threat indicators in the target threat field. Second, it actively extracts new indicators from the search results as new inputs and checks them as described above. In that way, the system works in a circle and generates IOCs continuously. Running this system for almost two months in the real world, it has the appreciable performances on the active checking of suspicious indicators and the automatic generation of IOCs.