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ronin-listener-dns is a DNS server for receiving exfiltrated data sent via DNS queries. ronin-listener-dns can be used to test for XML external entity (XXE) injection.

• Supports receiving any DNS query for a given domain.
• Always returns with NXDOMAIN to prevent DNS caching.

require 'ronin/listener/dns'

Ronin::Listener::DNS.listen('example.com', host: '127.0.0.1', port: 5553) do |query|
  puts "Received query for #{query.type} #{query.label} from #{query.source}"
end

Then try running host -p 5553 s3cr3t.example.com 127.0.0.1 to test the server.

Received query for A s3cr3t.example.com from 127.0.0.1:59042

Note: if you wish to run the server on 0.0.0.0 and port 53, the ruby script must be ran as root.

• Ruby >= 3.0.0
• async-dns ~> 1.0

$ gem install ronin-listener-dns

gem 'ronin-listener-dns', '~> 0.1'

gem.add_dependency 'ronin-listener-dns', '~> 0.1'

1. Fork It!
2. Clone It!
3. cd ronin-listener-dns/
4. bundle install
5. git checkout -b my_feature
6. Code It!
7. bundle exec rake spec
8. git push origin my_feature

Copyright (c) 2023-2024 Hal Brodigan ([email protected])

ronin-listener-dns is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

ronin-listener-dns is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with ronin-listener-dns. If not, see https://www.gnu.org/licenses/.