MSDNSScan is used to identify DNS records for target domains and check for zone transfers. There really isn't much special about it, and it's a lot like other tools you see installed on Kali. The goal is to implement some custom tooling into a "MayorSec Toolkit" to be released sometime in the future.
git clone https://github.com/dievus/msdnsscan.git
Change directories to msdnsscan and run:
pip3 install -r requirements.txt
This will run the install script to add necessary dependencies to your system.
python3 msdnsscan.py <domain>
And that's it!