Mass resolve 100k domains in less than 5 minutes and report non-existent ones.
The purpose of this script is to process a list of domains (e.g., from outbound SMTP logs) and identify non-existent ones. These domains can potentially be registered by adversaries to intercept mistakenly addressed emails.
- Python >=
3.11(tested with3.11) - Dependencies listed in
Pipfile
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Clone this repository:
git clone https://github.com/your-repo/nxdetective.git cd nxdetective -
Install dependencies using
pipenv:pipenv install
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Activate the virtual environment:
pipenv shell
Run the script with the following command:
python3 main.py process --nameservers 1.1.1.1,8.8.8.8 --workers_num 5 --qtype A list.csv--nameservers: Comma-separated list of DNS nameservers to use (e.g.,1.1.1.1,8.8.8.8).--workers_num: Number of asynchronous tasks per nameserver (e.g.,5workers per nameserver).--qtype: DNS query type to use (e.g.,A,MX,CNAME,TXT). Default isA.list.csv: Input CSV file containing the list of domains to resolve.
The script will resolve domains from list.csv and write non-existent domains to report.csv.
domain;popularity
example.org;1
e-xample.org;5
example.cn;3
e-x-ple.com;1
(Note: The popularity column is mandatory, but its values are irrelevant and do not affect the script's behavior. It is only used to indicate the subjective popularity of the domain, which can be useful when analyzing logs.)
The results will be saved in report.csv, listing all non-existent domains.