Turning on a computer kick-starts a chain of events that occurs before the OS is loaded. Firmware rouses the computer's subsystem to execute a series of tests and locates the boot loader, which, in turn, starts
I am using SkyLake laptops/Desktop. AppleLPC is not being used since SkyLake. I confirmed it through a real Mac dump and kernel log and ioreg. And I checked why the efi check was happening. I saw that eficheck kext was loaded under LPCB and my device id 9d48 was matched with efichec...
Used to allocate an additional memory buffer for the malicious kernel driver. OslArchTransferToKernel in winload.efi:Hooked to catch the moment when the OS kernel and some of the system drivers are already loaded in the memory, but still haven’t been executed – which is a perfect moment ...
UEFI abstracts access to the device by setting upUEFI Protocols. Theseprotocols are data structures containing function pointersand are identified by aGlobally Unique IDentifier (GUID)that allows other modules to locate and use them. They can be discovered through Boot Services. AUEFI driverpr...
calledNotMyFault. The basic idea behindNotMyFaultwas to create a tool that can be used to deliberately crash, hang, and cause kernel memory leaks on Windows systems. Its main target audience was kernel developers seeking useful ways to learn how to identify and diagnose device ...
(e.g. fails to boot things unsigned by the db key, but does boot things signed with it). Also able to see the keys with KeyTool. Even the kernel boot process sees the key and the rest of the efivars fs is properly loaded, however efi-readvar reports “no entries” for all secure...
4.2.3. Install the new nVidia driver by opening it up in Pacifist, right clicking on the 1.3-63-343.01.01f01-NVWebDrivers.pkg and install it to the Yosemite drive (no need to manually extract and install kexts): 4.2.4. Open Clover config.plist and add the following arguments to the ...
Contains the EDID information that was retrieved from the video output device. This information may differ from the EDID Active Protocol since the EDID Active Protocol will take into account any interaction with the EDID Override Protocol that was consumed by this driver. The EDID Discovered ...
By patching the Windows Boot Manager, attackers achieve execution in the early stages of the system boot process (see Figure 1), before the operating system is fully loaded. This allows ESPecter to bypass Windows Driver Signature Enforcement (DSE) in order to execute its own unsigned driver at...
It appears the threat author has manually modified and recompiled the driver code to use the boot time method to disable PatchGuard and DSE, as shown in Figure 16 below. Note that the driver configuration for the bypass method, stored ingDriverConfig, is set toDSE_DISABLE_AT_BOOT– see Figu...