mksub

Generate tens of thousands of subdomain combinations in a matter of seconds

Read a wordlist file and generate subdomain combinations for a given domain or list of domains. Input from the wordlist file is lowercased and only unique words are processed. Additionally, wordlist can be filtered using regex.

When you use mksub's -l parameter, it will generate all subdomain combinations up to the specified level, including all lower levels, using words from the wordlist. For instance, with -l 2, it will generate len(permutation_list)^2 + len(permutation_list) results, which is:

• 30 combinations for a 5-word wordlist.
• 10100 combinations for a 100-word wordlist.
• 250500 combinations for a 500-word wordlist.

Installation

Binary

Binaries are available in the latest release.

Docker

docker run quay.io/trickest/mksub

From source

go install github.com/trickest/mksub@latest

Usage

  -d string
        Input domain
  -df string
        Input domain file, one domain per line
  -l int
        Subdomain level to generate (default 1)
  -o string
        Output file (stdout will be used when omitted)
  -r string
        Regex to filter words from wordlist file
  -silent
        Skip writing generated subdomains to stdout (faster) (default true)
  -t int
        Number of threads for every subdomain level (default 100)
  -w string
        Wordlist file

Example

wordlist.txt

dev
DEV
*
foo.bar
prod

$ mksub -d example.com -l 2 -w input.txt -r "^[a-zA-Z0-9\.-_]+$"
dev.example.com
foo.bar.example.com
prod.example.com
foo.bar.dev.example.com
prod.dev.example.com
dev.dev.example.com
dev.foo.bar.example.com
foo.bar.foo.bar.example.com
prod.foo.bar.example.com
dev.prod.example.com
foo.bar.prod.example.com
prod.prod.example.com

Report Bugs / Feedback

We look forward to any feedback you want to share with us or if you're stuck with a problem you can contact us at [email protected]. You can also create an Issue or pull request on the Github repository.

Where does this fit in your methodology?

Mksub is an integral part of the Inventory workflow and many other workflows in the Trickest store. Sign up on trickest.com to get access to these workflows or build your own from scratch!