# Advanced Evasion ## Device Emulation When spoofing a hardmless PCI device, it is possible that a DMA device could emulate the PCI device in question. With this, the Windows driver for interacting with the spoofed device would be tricked into working as intended, where all actions to the device would be emulated by the attacker and responded to in an accurate manner. ## Custom Configuration Spaces w/ Xilinx Devices As outlined by Ulf Frisk in the [pcileech-fpga repository](https://github.com/ufrisk/pcileech-fpga/blob/master/ScreamerM2/build.md#configuration-space). It is possible to partially override the configuration space of Xilinx PCIe devices. This would allow us to spoof as much of the config space as possible of the harmless PCI device. Anticheats, as well, can create patterns within the configuration space that would trigger bans. By customizing our configuration space, we can avoid these detections provided a pattern doesn't identify the Xilinx IP. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://dma.lystic.dev/anticheat-evasion/advanced-evasion.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.