Gotator is a tool to generate DNS wordlists through permutations.

If you want to make modifications locally and compile it, follow the instructions below:

> git clone https://github.com/Josue87/gotator.git
> cd gotator
> go build

If you are only interested in using the program:

> go get github.com/Josue87/gotator

🐳 Docker option:

> git clone https://github.com/Josue87/gotator.git
> cd gotator
> docker build -t gotator . 
# Usage 
> docker run gotator -sub subdomains.txt  [...]

Note If you are using version 1.16 or higher and you have any errors, run the following command:

> go env -w GO111MODULE="auto"

To upgrade the version add the -u parameter to the installation command.

Gotator has the following features for permutation:

• Checks domain and TLD analyzing ccSLDs to avoid going out of scope (example.com, example.com.mx, etc.).
• Permute numbers up and down [-numbers ], for example:
  • Target subdomain is 10 and numbers flag is set to 3 [-numbers 3], as a result we will have between 7 and 13.
  • Target subdomain is dev1 and numbers flag is set to 3 [-numbers 3], we will see dev0, dev1, dev2, dev3, and dev4 (avoiding negative numbers).
• Gotator has 3 levels of depth [-depth ]:
  • If depth is set to 1 (default mode), to permute test word on example.com, we will get test.example.com. With this option if subdomain target is tech.example.com and permutation is test we also interchange the position for the permutation "-" and "", obtaining results such as techtest.example.com and tech-test.example.com (check example 1).
  • If depth is set to 2, and we have to permute dev and demo on example.com, we will obtain dev.demo.example.com or demo-dev.example.com apart from demo.example.com and dev.example.com. Depth level 3 is an extension of this example.
• Control and reduce duplicates (due to the high number of lines generated, the objective here is to reduce as much as possible the domains with almost null possibilities to exist):
  • If we have test.example.com and the next permutation will be test again, it is ignored.
  • If we have testing.example.com and test comes up, when matching test it will be joined with . and -, avoiding testtesting.example.com
  • If we have 100.example.com and it gets 90 to permute, the permutation is ignored as it already has a number permutation feature.
  • If we have test100.example.com and it gets test to permute, we remove numbers and test==test so the permutation is ignored as it already has something very similar.
• For the subdomains within the target, for example demo210.example.com, we get the value demo210 and add it to the permutations list.
• Mode to "swap" domains, i.e. if the target is dev.tech.example.com, it will be added as target tech.example.com and example.com [-md].
• Option to add default permutations list defined in gotator [-prefixes].
• Only the results are written to the standard output. Banner and messages are sent to the error output. So you can pipe the command.

The flags that can be used to launch the tool:

gotator -sub domains.txt -perm permutations.txt -depth 2 -numbers 5 > output.txt

To filter the result and remove possible duplicates:

gotator -sub domains.txt -perm permutations.txt -depth 3 -numbers 10 -md | uniq > output2.txt

Change uniq to sort -u of the previous command if you want to sort them. (Not recommended due to time)

Note: If you are compiling locally don't forget the ./ in front of your binary!

We have the following lists:

In the first example we mutate on the specified subdomain

In the following example we instruct Gotator to extract possible domains from the subdomains with -md:

You can see that example.com is taken into account. Now an example with a list of permutations containing test100demo and we give it the argument -numbers 3:

It is possible to see a greater mutation depth and also specify the prefixes parameter (which adds a small mutation list).

The last example shows only part of the output.

Finally, an example with silent mode and different depths with output redirection to a file.

This tool can generate huge size files and some duplicates, we encourage to filter the output with uniq or sort -u and take care of depth flag due to the size output (it's easy to generate files > 10 GB). Keep in mind piped output to other tools requires the tool processing the whole output at once (sort, uniq).

• Examples:

# Filter output by size
gotator -sub subs.txt -perm perm.txt -depth 2 -numbers 5 -md | head -c 1G > output1G.txt

# Filter output by lines
gotator -sub subs.txt -perm perm.txt -depth 3 -numbers 20 | head -n 100000 > output100Klines.txt

# Sort unique lines
gotator -sub subs.txt -perm perm.txt -depth 2 -numbers 10 -prefixes | sort -u > outputSortUnique.txt

# Unique lines 
gotator -sub subs.txt -perm perm.txt -depth 3 | uniq > outputUnique.txt

# Sort unique with limit size
gotator -sub subs.txt -perm perm.txt -prefixes | head -c 1G | sort -u > output1GSortedUnique.txt

Note: Examples have been given using sort -u, that will slow down the generation of results. There is no need to sort the results, it is recommended to use uniq or anew.