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README.md

README.md

Blitzableiter

About

The Blitzableiter project was initiated in 2009 by Recurity Labs GmbH. The goal was to find a way to fight flash malware since the Flash runtime was unfixable and traditional detection mechanisms (AV/IDS) failed. The constant surfacing of new attacks against Flash requires a defense approach that doesn’t depend on attack signatures.

Blitzableiter is implemented in fully managed C#, targeting the .NET 2.0 runtime and is binary compatible with the Microsoft CLR as well as Mono 1.2.

"Blitzableiter" is the German term for lightning rod, since it turns dangerous lightning into a harmless flash

What it does

The approach is to safely parse the complete SWF file, strictly verify all data structures against their specified properties, discard the original file and create a new, "normalized" SWF file for the final consumer (Normalization through Recreation). It produces a non-malicious Flash file as output by verifying the inter-Tag consistency and potentially adjusting the AVM byte code. Wellformed input files produce functionally equivalent output files.

For more information read this this presentation from BlackHat USA 2010

Licensing

The SWF Library is Open Source under GPLv3. For other parts of the project other license models may apply. Contact Felix Lindner at Recurity Labs GmbH to obtain a license that fit your needs.