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Formal Approach on Intrusion Detection and Response System

Formal Approach on Intrusion Detection and Response System. Tanmoy Sarkar, JohnnyWong, Samik Basu. Intrusion detection and response deployment. Previous Work. Intrusion Detection and Response(IDR) Framework. Composed of two facets: Intrusion Detection System based on Exact Graph.

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Formal Approach on Intrusion Detection and Response System

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  1. Formal Approach on Intrusion Detection and Response System Tanmoy Sarkar, JohnnyWong, Samik Basu Iowa State University Department of Computer Science 11/19/2008

  2. Intrusion detection and response deployment

  3. Previous Work • Intrusion Detection and Response(IDR) Framework. Composed of two facets: • Intrusion Detection System based on Exact Graph. • Patterns of System Calls • Intrusion Response System: • Automated • Preemptive • Real Time

  4. Framework Main Focus Main Focus Develop a model to select a response that will have least negative effect on the system

  5. Improved Response Deployment • Linux based prototype implementation • User level • What response to deploy • Multiple Responses • Response is selected based on several factors: • How well it will mitigate the given attack • The adverse effect it will have on the system resources • Our approach to select optimal response • Estimate Intrusion Cost • Estimate Response Cost • Minimize overall cost

  6. Example: Illegal Shell Access Anomalous pattern generation in “whoami” utility. if(argc> && strcmp(argv[1],”--backdoor”)==0)){ char *line[2]; args[0] = “sh”; args[1] = NULL; setuid(0);setgid(1); execve(“/bin/sh”, line); } “whoami -backdoor” generates abnormal sequence of system calls “write, setuid, setgid, execve() ” Best Response is selected for deployment by our mechanism with low risk factor with a good probability to succeed

  7. Working Prototype

  8. Thank You

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