resolvr

Resolves domains and optionally filters on in-scope results.

Examples

Docs

root@kali:~/.../personal/resolvr$ ./resolvr.py -h
usage: resolvr [-h] [-v] [-q] [-i [INPUT]] [-o [OUTPUT]] [-s [SCOPE]]
               [-O [OUT_OF_SCOPE]] [-n [NO_RESOLVE]]

Resolves domains and optionally filters on in-scope results

optional arguments:
  -h, --help            show this help message and exit
  -v, --version         show program's version number and exit
  -q, --quiet           surpress extra output
  -i [INPUT], --input [INPUT]
                        input list of domains to test (default stdin)
  -o [OUTPUT], --output [OUTPUT]
                        output filename
  -s [SCOPE], --scope [SCOPE]
                        input list of in-scope address ranges (default *)
  -O [OUT_OF_SCOPE], --out-of-scope [OUT_OF_SCOPE]
                        out of scope hosts output filename
  -n [NO_RESOLVE], --no-resolve [NO_RESOLVE]
                        non-resolved hosts output filename

Basic Usage

First, you need a list of domains and subdomains that are possibly a target, usually discovered through any number of subdomain enumeration techniques:

root@kali:~$ subbrute.py company.com -o discovered_subdomains_company.com.txt
company.com
dev.company.com
wiki.company.com
host2.company.com
...omitted for brevity...

Generally you want to take this list and feed it into resolvr, like so:

root@kali:~$ resolvr.py -i discovered_subdomains_company.com.txt -o resolvr_results_company.com.txt
                           ___                      
                          /\_ \                     
 _ __    __    ____    ___\//\ \    __  __   _ __   
/\`'__\/'__`\ /',__\  / __`\\ \ \  /\ \/\ \ /\`'__\ 
\ \ \//\  __//\__, `\/\ \L\ \\_\ \_\ \ \_/ |\ \ \/  
 \ \_\\ \____\/\____/\ \____//\____\\ \___/  \ \_\  
  \/_/ \/____/\/___/  \/___/ \/____/ \/__/    \/_/  
                                                    
                                             v1.0
info: Host company.com resolves to 255.255.255.254
error: Failed to resolve the host dev.company.com
error: Failed to resolve the host wiki.company.com
info: Host host2.company.com resolves to 255.255.255.255
...omitted for brevity...

Target Filtering

Additionally, if you know the exact CIDR ranges of which hosts are in scope, you can feed this in as well, which will be taken into account:

root@kali:~$ cat target_ranges.txt 
255.255.255.255/32

root@kali:~$ resolvr.py -i discovered_subdomains_company.com.txt -o resolvr_results_company.com.txt -s target_ranges.txt 
                           ___                      
                          /\_ \                     
 _ __    __    ____    ___\//\ \    __  __   _ __   
/\`'__\/'__`\ /',__\  / __`\\ \ \  /\ \/\ \ /\`'__\ 
\ \ \//\  __//\__, `\/\ \L\ \\_\ \_\ \ \_/ |\ \ \/  
 \ \_\\ \____\/\____/\ \____//\____\\ \___/  \ \_\  
  \/_/ \/____/\/___/  \/___/ \/____/ \/__/    \/_/  
                                                    
                                             v1.0
info: Host company.com resolves to 255.255.255.254 but is *not* in scope
error: Failed to resolve the host dev.company.com
error: Failed to resolve the host wiki.company.com
info: Host host2.company.com resolves to 255.255.255.255 and is in scope
...omitted for brevity...

Installation

Standard

pip3 install resolvr

Bleeding Edge

Use this only if the central package is out of date, and you need to install the latest package with the latest features.

python3 setup.py install

Development

• It is recommended that you use a virtual environment for development:
  • virtualenv --python python3 venv
  • source ./venv/bin/activate
• python setup.py develop
• Run with resolvr like normal
• Upload to PyPI using the process outlined in https://packaging.python.org/tutorials/packaging-projects/