Code obfuscation using pseudo-random number generators

Ofuscación de código utilizando generadores de números pseudoaleatorios

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John Aycock
Juan M. Gutiérrez
Daniel M. Nunes
Abstract
We describe a novel method for malicious code obfuscation that uses code already present in systems: a pseudo-random number generator. This can also be seen as an antidisassembly and anti-debugging technique, depending on deploy- ment, because the actual code does not exist until run – it is generated dynamically by the pseudo-random number generator. A year’s worth of experiments are used to demonstrate that this technique is a viable code obfuscation option for a malicious adversary with access to large amounts of computing power.
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Author Biographies / See

John Aycock, University of Calgary, Alberta, Canada

Department of Computer Science University of Calgary 2500 University Drive NW Calgary, Alberta, Canada T2N 1N4.

Daniel M. Nunes, University of Calgary, Alberta, Canada

Department of Computer Science University of Calgary 2500 University Drive NW Calgary, Alberta, Canada T2N 1N4.
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