By Anoop Singhal, Changwei Liu and Duminda Wijesekara
Attack graphs are used to compute potential attack paths from a system configuration and known vulnerabilities of a system. Attack graphs can be used to eliminate known vulnerability sequences that can be eliminated to make attacks difficult and help forensic examiners in identifying many potential attack paths. After an attack happens, forensic analysis, including linking evidence with attacks, helps further understand and refine the attack scenario that was launched. Given that there are anti-forensic tools that can obfuscate, minimize or eliminate attack footprints, forensic analysis becomes harder. As a solution, we propose to apply attack graph to forensic analysis. We do so by including anti-forensic capabilities into attack graphs, so that the missing evidence can be explained by using longer attack paths that erase potential evidence. We show this capability in an explicit case study involving a Database attack.