Windows 7 SP1 x64 Code Integrity Bypass POC using ltmdm64.sys
Bug was found in ltmdm64.sys!DriverEntry driver incorrectly uses RtlQueryRegistryValues API it also lacks security cookies across entire binary except GsDriverEntry function. This PoC was created back in 2014 and submitted later to MSRC they were not able to located the driver authors but also didn’t take any action on fixing the problem. ltmdm64.sys is shipped since Windows Vista and present in digitally signed catalog files. This PoC is detected by Windows Defender as Exploit:Win64/Ropero.A


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