Here is a clear breakdown of what this installer is, how it got there, and whether you actually need it. What is VulkanRT?
Use a tool like VirusTotal or check the digital signature. A legitimate vulkanrt-1.1.108.0-installer.exe should be signed by The Khronos Group Inc. or LunarG, Inc. vulkanrt-1.1.108.0-installer
The Runtime (RT) is the essential system component that allows applications built with Vulkan to communicate with your graphics card. Without it, any Vulkan-based game or application will fail to launch. Here is a clear breakdown of what this