Assessment of an Automatic Correlation Rules Generator

Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9478)

Abstract

Information systems are prone to attacks. Those attacks can take different forms, from an obvious DDOS to a complex attack scenario involving a step by step stealthy compromise of key nodes in the target system. In order to detect those multi-steps attack scenarios, alert correlation systems are required. Those systems rely on explicit or implicit correlation rules in order to detect complex links between various events or alerts produced by IDSes. Explicit and accurate correlation rules strongly linked with the system are difficult to build and maintain manually. However this process can be partially automated when enough information on the attack scenario and the target system are available. In this paper, we focus on the evaluation of correlation rules produced by an automatic process. In a first place, the method is evaluated on a representative system. In this realistic evaluation context, when the knowledge of both the attack scenario and the targeted system is precise enough, the generated rules allow to have a perfect detection rate (no false positive and no false negative). Then stress tests are conducted in order to measure the robustness of the approach when the generation of rules relies on a provided knowledge which is either partially incorrect or incomplete.

Keywords

Alert correlation evaluation Attack scenario Attack tree 

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • E. Godefroy
    • 1
    • 2
    • 3
  • E. Totel
    • 3
  • M. Hurfin
    • 2
  • F. Majorczyk
    • 1
  1. 1.DGA-MIBruzFrance
  2. 2.InriaRennesFrance
  3. 3.CentraleSupélecRennesFrance

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