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Host Based Intrusion Detection: Analyzing System Logs

Host Based Intrusion Detection: Analyzing System Logs. Bob Winding, Vikram Ahmed University of Notre Dame 12/13/2006. The Problem. The number and sophistication of attacks is increasing It is hard to “know” that a system is intact If a system is compromised, what happened?

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Host Based Intrusion Detection: Analyzing System Logs

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  1. Host Based Intrusion Detection: Analyzing System Logs Bob Winding, Vikram Ahmed University of Notre Dame 12/13/2006

  2. The Problem • The number and sophistication of attacks is increasing • It is hard to “know” that a system is intact • If a system is compromised, what happened? • How do we instrument systems for a very high level of security or surveillance? • How can we analyze the data?

  3. Sebek and Honeynet • Honeynet project • An architecture for hacker surveillance • Correlates Kernel logging and network activity • Integrates kernel logging, packet capture, and IDS detects • Tunable and extensible kernel logging • Replace system call table entries (Linux) • Load time filtering • Windows XP – Less full feature implementation • Honeywall to control the risk of observing intrusions.

  4. Our Setup

  5. Hacking Windows and Linux • Metasploit framework • Not a lot of success in hacking Linux • Several successful exploits for Windows • Problems with Windows Sebek

  6. Data Capture Tools • Windows XP • Windows Perfmon trace facility • SysInternals • Process Explorer • Filemon • Sebek • Honeynet Snort IDS

  7. The Data • Process creation / deletion • Process ID and parent process ID • XP Process Tree • Network connections • File system activity • (open, close, read, write) • Keystrokes • IDS Events

  8. XP Process Tree

  9. Analysis

  10. Analysis (cont)

  11. Performance Observations • No formal performance analysis • No noticeable performance impact • If extensive logging is turned on then there is an impact – You can’t log everything

  12. Conclusions • A modest amount of logging can greatly aid in forensics or detection • OS behavior/design can be leveraged • XP Process Tree • Combining multiple data sources is needed • Honeynet is a good architecture with incomplete tools • Augmenting Sebek with identified data is needed

  13. Questions?

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