Intrusion Detection using Sequences of System Calls.
You can download it from the following link: https://packetstormsecurity.com/files/download/51919/Intrusion-Detection-using-Sequences-of-System-Calls.pdf
Source: https://packetstormsecurity.com/files/51919/Intrusion-Detection-using-Sequences-of-System-Calls.pdf.html

