Amazon Device randomly showing up on Network.

It's an Amazon firestick.  I just saw the same thing (called Karnak) on my PC after hooking the (what I thought was a USB) from my brother's laptop to my PC. (If you're wondering why, my brother recently died from Covid :( and I'm going through his stuff)

In my case, it turned out to be my Alexa Echo Dot device.

I had recently upgraded my home network and hadn't updated the wireless settings. The device was showing up trying to connect to the network, would then fail and drop off. It would periodically try to connect again. I noted the mac address of the mysterious device, and then fixed the network connectivity on the Alexa Dot. When I checked the MACs of the connected devices, the same previously mysterious MAC was now connected with an IP address and a description of "amazon-17a28fce5"

No. I don't any Dash buttons.

I have just had to reinstall my system (Creator's Fall (1709/16299.64), and now I have a suez, which appears when I first view the network devices and vanishes after a couple of minutes. It still doesn't have an IP address or appear in the list of devices connected to the router and I'm pretty sure it's a non-existent device. (I was on the Insider program when I first experienced this.)

I've just had a "suez" Amazon Fire appear too :)

thank you so much, yes i have done that roughly 5 times, i have fond that there is a hypervisor on my bios and looked at events and there are a lot of kernel errors, i have reinstalled windows 10 (clean) and it continues to happen, the devices show up and in a matter of hours the system logs on my router, says harvesting data, and my cell phone is being port mapped [IGD] and 4 numbers then says port mapping [ip address] and a different port number every time, i don't use port forwarding, and the ISP completely dis regards my complaints and say my router is set up very safe. also when i put a WIFI adaptor just to see more networks than my computer picks up is shows my WIFI name  1st then the sam signal strength, same channels, WEP is disabled, mine is not, and almost same mac but one or two numbers different, and the SSID is hidden. Also when i reset my my router the many many times i did, One time a NETGEAR5_EXT showed up, and as soon as i saw it it disappeared. I do believe someone is cloning or extending my router not for the WIFI but something else, and i don't know what else to do. That's why I'm not sure if its the hypervisor that was detected and i got that info on the Wi-Fi adaptor as well, It says a hypervisor has been detected and the information will not be displayed. I'm not asking to to help me and walk me thru it by any means and i appreciate you responding in the first place, but if you can tell me anything about this i will be indebted to you.