OWASP Threat Dragon is a free, open-source, cross-platform threat modelling application including system diagramming and a threat rule engine to auto-generate threats/mitigations. The roadmap for the project is a simple UX, a powerful rule engine and integration with other development lifecycle tools.
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: