I'm a PhD candidate at the University of Texas at Dallas, working with my advisor Dr. Kevin W. Hamlen in the field of computer security. My research focuses mostly on malware obfuscation, malware detection and automated program rewriting. Some of that research has been featured in the Economist, New Scientist, Wired and NBC News. I'm also interested in artificial intelligence, philosophy, neuroscience, and procrastinating (usually by playing on the guitar). You'll find a smattering of these and other topics on my blog here.

A list of some projects I've been working on and their associated publications are listed below.


  1. Frankenstein is a system that stitches together malware from benign binaries. Given a high-level description of what the malware should do, Frankenstein looks for semantically useful sequences of code (adding two values, moving a value from one location to another, etc) in the programs on a host system and finds combinations of these sequences that when executed, implement the malware description. It synthesizes a new binary for every combination it finds, creating malware mutants that are composed entirely of bytes from benign programs-making them much harder to detect using standard feature-based detectors.

  2. Stir is an automated program rewriting tool that prevents ROP-attacks by self-randomizing all basic blocks within the program at run-time, on each invocation, without source code or debug information. If you don't know where the gadgets are, you can't use them.

  3. Reins is also an automated rewriter that requires no source code or debug symbols, that can secure an untrusted program by enforcing (custom) security policies. Want to make sure Outlook can't attach any files from your c:\SuperSecretWork\ directory? Reins can rewrite it to do that. Or maybe you want to allow such an attachment to be sent only once a day, and only if the recipient happens to be you? Reins can do that too!

  4. Macgyver is a malware propagation mechanism that works by generating transformation functions that can take a benign file (like Notepad) as input and produce the malware you want as output. The transformation function consists of simple mathematical operations and contains nothing that can be flagged as malicious. Its a kind of encryption, except you transmit the (harmless looking) encryption function, and the key happens to be a benign file on the target system.

Note: Unfortunately many (read all) of these projects are either on-going efforts, or are being expanded into better (meaner?) versions of themselves. As a result I don't have any source code, or binaries (but really you shouldn't be downloading any binaries from me :) ) to share at the moment. This may change in the not-too-distant future though.


  1. Securing Untrusted Code via Compiler-Agnostic Binary Rewriting. In Proceedings of the 28th Annual Computer Security Applications Conference (ACSAC), December 2012. Richard Wartell, Vishwath Mohan, Kevin W. Hamlen, and Zhiqiang Lin. Awarded best student paper

  2. Binary Stirring: Self-randomizing Instruction Addresses of Legacy x86 Binary Code. In Proceedings of the 19th ACM Conference on Computer and Communications Security (CCS), October 2012. Richard Wartell, Vishwath Mohan, Kevin W. Hamlen, and Zhiqiang Lin. NYU Poly AT&T Best Applied Security Paper 2012 Runners-up

  3. Frankenstein: Stitching Malware from Benign Binaries. In Proceedings of the 6th USENIX Workshop on Offensive Technologies (WOOT), August 2012. Vishwath Mohan and Kevin W. Hamlen.

  4. Reining In Windows API Abuses with In-lined Reference Monitors. Technical Report UTDCS-18-10, Computer Science Department, The University of Texas at Dallas, Richardson, Texas, June 2010. Kevin W. Hamlen, Vishwath Mohan, and Richard Wartell.

  5. Exploiting an Antivirus Interface. Computer Standards & Interfaces Journal, 31(6):1182-1189, April 2009. Kevin W. Hamlen, Vishwath Mohan, Mohammad M. Masud, Latifur Khan, and Bhavani Thuraisingham.

About this blog

I'm using Brandon Mathis' excellent Octopress framework for the blog, with the unaltered version of the Fabric theme in lieu of Octopress's default. The blog is hosted on Github Pages. If you're interested, you can also read a slightly more in depth explanation of my blog setup and why I chose it.

I've since switched over to using Pelican - a static site generator written in Python that is just awesome.