Category: Reverse Engineering

Superseding Driver Altitude Checks on Windows

It was brought to my attention that in an article on my former research portfolio. I mentioned another way to manipulate an unsigned driver and perform some black magic. This black magic is done by modifying a flag in the _DRIVER_OBJECT allowing for the loaded driver to supersede altitude checks, register callbacks both with the […]

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Reading MSRs from UserMode

After speaking with some pals online about Windows 10’s policy requiring drivers to be digitally signed in order to load the lot of us began digging into tools that use signed drivers – you know… to see if there was any fun to be had with drivers that don’t validate UserMode addresses that are passed […]

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