Hypervisor Event Logs as a Source of Consistent Virtual Machine Evidence for Forensic Cloud Investigations

Cloud Computing is an emerging model of computing where users can leverage the computing infrastructure as a service stack or commodity. The security and privacy concerns of this infrastructure arising from the large co-location of tenants are, however, significant and pose considerable challenges in its widespread deployment. The current work addresses one aspect of the security problem by facilitating forensic investigations to determine if these virtual tenant spaces were maliciously violated by other tenants. It presents the design, application and limitations of a software prototype called the Virtual Machine (VM) Log Auditor that helps in detecting inconsistencies within the activity timelines for a VM history. A discussion on modeling a consistent approach is also provided.