Black Hat Asia 2014 - Persist It: Using and Abusing Microsoft's Fix It Patches

3,944 views · Published 3 April 2014 · 49:27 · Indexed 20 September 2026

Channel: Black Hat · 2014 · People & Blogs

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By: Jon Erickson

Microsoft has often used Fix It patches, which are a subset of Application Compatibility Fixes, as a way to stop newly identified active exploitation methods against their products. A common Fix It patch type used to prevent exploitation is the previously undocumented In Memory Fix It. This research first focuses on analyzing these in-memory patches. By extracting information from them researchers are able to better understand the vulnerabilities that Microsoft intended to patch. The research then focuses on reverse engineering the patches and using this information to provide the ability to create patches which can be used to maintain persistence on a system.

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