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Center for Education and Research in Information Assurance and Security

Deceptive Memory Systems


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Christopher N. Gutierrez

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CERIAS TR 2017-5

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Unauthorized data destruction results in a loss of digital information and services, a devastating issue for society and commerce that rely on the availability and integrity of such systems. Remote adversaries who seek to destroy or alter digital information persistently study the protection mechanisms and craft attacks that circumvent de­fense mechanisms such as data back-up or recovery. This dissertation evaluates the use of deception to enhance the preservation of data under the threat of unauthorized data destruction attacks. The motivation for the proposed solution is two-fold. (i) An honest and consistent view of the preserva­tion mechanisms are observable and often controlled from within the system under protection, allowing the adversary to identify an appropriate attack for the given sys­tem. (ii) The adversary relies on some underlying I/O system to facilitate destruction and assumes that the components operate according to a confirmation bias based on prior interactions with similar systems. A deceptive memory system, DecMS, masks the presence of data preservation and mimics a system according to the adversary’s confirmation bias. Two proofs of concepts and several destructive threat instances evaluate the fea­sibility of a DecMS. The first proof of concept, DecMS-Kernel, uses rootkits’ stealth mechanisms to mask the presence of DecMS and impede potential destructive writes to enable preservation of data before destruction. The experimental results show that DecMS is effective against two common secure delete tools and an application that mimics crypto ransomware methods.




2017 – 12

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A hard-copy of this is in the Papers Cabinet

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