“…Thus, NER in CTI plays a major role in supporting and achieving cybersecurity research. Researches about NER in CTI have been widely pursued in recent years, and they can be summarized in the following three categories: rules-based [2], [3], [4], [5], [6], statistical characteristicsbased [7], [8], [9], [10], [11] and deep learning-based [12], [13], [14], [15], [16], [17], [18], [19].…”