PCI Express DIY hacking toolkit What This repository contains a set of tools and proof of concepts related to PCI-E bus. It includes HDL design which implements software controllable PCI-E gen 1.1 endpoint device for with Spartan-6 FPGA. In comparison with popular this design allows to operate with raw Transaction Level Packets (TLP) of PCI-E bus and perform full 64-bit memory read/write operations. It's early version of my first much or less complicated FPGA project, so the speed is quite slow (around 1-2 Mb/s), but in upcoming releases it will be significantly increased by connecting PCI-E endpoint to MicroBlaze soft processor with AXI DMA engine.

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Feb 2, 2016.%D,.

However, even such low speed is more than enough for reliable implementation of various practical attacks over PCI-E bus: to demonstrate applied use cases of the design, for pre-boot DMA attacks on UEFI based machines which allow executing arbitrary UEFI DXE drivers during platform init. Shows how to use pre-boot DMA attacks to inject into the enabled Windows 10 Enterprise running on UEFI Secure Boot enabled platform. Provided Hyper-V backdoor PoC might be useful for reverse engineering and exploit development purposes, it for inspecting of hypervisor state (VMCS, physical/virtual memory, registers, etc.) from guest partition and perform the guest to host VM escape attacks. Contents • s6_pcie_microblaze.xise − Xilinx ISE project file. • microblaze/pcores/axis_pcie_v1_00_a − Custom peripheral module which allows connecting PCI Express integrated endpoint block of Spartan-6 FPGA as raw TLP stream to MicroBlaze soft processor core.

• sdk/srec_bootloader_0 − Simple bootloader for MicroBlaze soft processor, it using SREC image format and onboard linear flash memory of SP605 to load and store main MicroBlaze program. • sdk/main_0 − Main program for MicroBlaze soft processor, it forwards raw TLP packets of PCI-E bus into the TCP connection using onboard Ethernet port of SP605. • python/pcie_lib.py − Python library that talks over the network to main MicroBlaze program running on SP605 board.

• python/pcie_mem.py − Command line program that dumps host RAM into the screen or output file by sending MRd TLPs. • python/pcie_mem_scan.py − Command line program that scans target host for physical memory ranges accessible over PCI-E bus, it's useful for a security audit of IOMMU enabled platforms (examples:,,, ). • python/uefi_backdoor_simple.py − Command line program for pre-boot DMA attack which injects dummy UEFI driver into the target. • python/uefi_backdoor_hv.py − Command line program for pre-boot DMA attack which injects Hyper-V VM exit handler backdoor into the target. • python/payloads/DmaBackdoorSimple − Dummy UEFI DXE driver. • python/payloads/DmaBackdoorHv − UEFI DXE driver which implements Hyper-V backdoor and backdoor client. Ready to use FPGA bitstream files s6_pcie_microblaze.mcs and s6_pcie_microblaze.bin can be downloaded.