OWASP Threat Dragon is a free, open-source, cross-platform application for creating threat models. Use it to draw threat modeling diagrams and to identify threats for your system. With an emphasis on flexibility and simplicity it is easily accessible for all types of users
For versions of Ubuntu between 14.04 LTS (Trusty Tahr) and 15.10 (Wily Werewolf), as well as Ubuntu flavours that don’t include snap by default, snap can be installed from the Ubuntu Software Centre by searching for snapd.
Alternatively, snapd can be installed from the command line:
sudo apt update
sudo apt install snapd
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
To install threat-dragon, simply use the following command: