"Hey - this isn't a security blog!"

IKR?  But yeah, this BlueKeep stuff  a.k.a CVE-2019-0708 seems scary.  So, some nice peeps out there have made scanning utilities for this stuff.  https://github.com/robertdavidgraham/rdpscan

There are pre-build MacOS and Windows binaries there.  If you love Docker (and I know you do), I also made an image here:

leonowski/rdpscan:latest
To use it, simply invoke it like this:

docker run --rm -i leonowski/rdpscan:latest x.x.x.x

Where "x.x.x.x" is the IP you want to scan.  Full usage and instructions at:  https://github.com/robertdavidgraham/rdpscan .  You can also pass in a subnet like x.x.x.x/24 or even a file with a list to scan.

I used google's fantastic distroless images as the base to keep things small.  Dockerfile available here:  https://hub.docker.com/r/leonowski/rdpscan