Whenever you want to install or run an application, it is worth checking whether or not a Dockerfile exists that can be used instead.
Let’s start with a program we used in a previous unit for reconnaissance, Project Discovery’s subfinder
As a refresher, in the previous unit, Web Application Attacks, we used subfinder to perform subdomain enumeration on a target site.
For example, we could point subfinder at a domain like airbnb.com and it would produce a list of known subdomains using various OSINT sources.
However, subfinder is written using the go programming language.
- We had to install go.
- We had to edit the Linux environment file
Installing go and getting everything set up to run programs written in go is certainly worth your time, but Docker can save us a lot of trouble!
Go to the subfinder GitHub page here and copy the address we need to clone this repository.
Clone the repository on your Kali VM.
git clone <https://github.com/projectdiscovery/subfinder.git>
cd into the directory we just cloned.
cd subfinder
ls
Build the image with the tag -t subfinder.
docker build -t subfinder .