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Hidden in .NET

Valhalla #1
August 2011

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Microsoft decided to include compilers along with the .NET framework that is available pretty much in every computer of the world running Windows. Compilers include one for JScript .NET. So, we can compile our JScript virus source into .NET assembly. Imagine you have polymorphic JScript virus, it is transformed to MSIL code, what is the result? One great .NET assembly that looks very different than previous one, so in each computer you can generate multiple polymorphic or even more complex instances of the virus running and spreading as exe file.

This is much more powerful technique than using JS2EXE tools. ;) Since now you can infect files and recompile yourself!

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