A cross-platform tool that use Certificates Transparency logs to find subdomains. We currently support Linux, Windows and MacOS.

How it works?
It tool doesn't use the common methods for sub(domains) discover, the tool uses Certificate Transparency logs to find subdomains and it method make it tool very faster and reliable. The tool make use of multiple public available APIs to perform the search. If you want to know more about Certificate Transparency logs, read https://www.certificate-transparency.org/

Installation Linux
If you want to install it, you can do that manually compiling the source or using the precompiled binary.
Manually: You need to have Rust installed in your computer first.

$ git clone https://github.com/Edu4rdSHL/findomain.git
$ cd findomain
$ cargo build --release
$ sudo cp target/release/findomain /usr/bin/
$ findomain

Using the binary:

$ wget https://github.com/Edu4rdSHL/findomain/releases/latest/download/findomain-linux
$ chmod +x findomain-linux
$ ./findomain-linux

If you are using the BlackArch Linux distribution, you just need to use:

$ sudo pacman -S findomain

Installation Windows
Download the binary from https://github.com/Edu4rdSHL/findomain/releases/latest/download/findomain-windows.exe
Open a CMD shell and go to the dir where findomain-windows.exe was downloaded.
Exec: findomain-windows in the CMD shell.

Installation MacOS

$ wget https://github.com/Edu4rdSHL/findomain/releases/latest/download/findomain-osx
$ chmod +x findomain-osx.dms
$ ./findomain-osx.dms

Usage
You can use the tool in two ways, only discovering the domain name or discovering the domain + the IP address.

findomain 0.1.4
Eduard Tolosa <[email protected]>
A tool that use Certificates Transparency logs to find subdomains.

USAGE:
    findomain [FLAGS] [OPTIONS]

FLAGS:
    -a, --all-apis    Use all the available APIs to perform the search. It take more time but you will have a lot of
                      more results.
    -h, --help        Prints help information
    -i, --get-ip      Return the subdomain list with IP address if resolved.
    -V, --version     Prints version information

OPTIONS:
    -f, --file <file>        Sets the input file to use.
    -o, --output <output>    Write data to output file in the specified format. [possible values: txt, csv, json]
    -t, --target <target>    Target host

Examples

1. Make a simple search of subdomains and print the info in the screen:

findomain -t example.com

2. Make a simple search of subdomains using all the APIs and print the info in the screen:

findomain -t example.com -a

3. Make a search of subdomains and export the data to a CSV file:

findomain -t example.com -o csv

4. Make a search of subdomains using all the APIs and export the data to a CSV file:

findomain -t example.com -a -o csv

5. Make a search of subdomains and resolve the IP address of subdomains (if possible):

findomain -t example.com -i

6. Make a search of subdomains with all the APIs and resolve the IP address of subdomains (if possible):

findomain -t example.com -i -a

7. Make a search of subdomains with all the APIs and resolve the IP address of subdomains (if possible), exporting the data to a CSV file:

findomain -t example.com -i -a -o csv

Features

• Discover subdomains without brute-force, it tool uses Certificate Transparency Logs.
• Discover subdomains with or without IP address according to user arguments.
• Read target from user argument (-t).
• Read a list of targets from file and discover their subdomains with or without IP and also write to output files per-domain if specified by the user, recursively.
• Write output to TXT file.
• Write output to CSV file.
• Write output to JSON file.
• Cross platform support: Linux, Windows, MacOS.
• Optional multiple API support.

Issues and requests
If you have a problem or a feature request, open an issue.