Altdns - Generates permutations, alterations and mutations of subdomains and then resolves them

ID KITPLOIT:4949478755028911927
Type kitploit
Reporter KitPloit
Modified 2018-02-16T21:14:17


Altdns is a DNS recon tool that allows for the discovery of subdomains that conform to patterns. Altdns takes in words that could be present in subdomains under a domain (such as test, dev, staging) as well as takes in a list of subdomains that you know of.

From these two lists that are provided as input to altdns, the tool then generates a _ massive _ output of "altered" or "mutated" potential subdomains that could be present. It saves this output so that it can then be used by your favourite DNS bruteforcing tool.

Alternatively, the -r flag can be passed to altdns so that once this output is generated, the tool can then resolve these subdomains (multi-threaded) and save the results to a file.

Altdns works best with large datasets. Having an initial dataset of 200 or more subdomains should churn out some valid subdomains via the alterations generated.


pip install -r requirements.txt


# ./ -i subdomains.txt -o data_output -w words.txt -r -s results_output.txt
  • subdomains.txt contains the known subdomains for an organization
  • data_output is a file that will contain the _ massive _ list of altered and permuted subdomains
  • words.txt is your list of words that you'd like to permute your current subdomains with (i.e. admin , staging , dev , qa ) - one word per line
  • the -r command resolves each generated, permuted subdomain
  • the -s command tells altdns where to save the results of the resolved permuted subdomains. results_output.txt will contain the final list of permuted subdomains found that are valid and have a DNS record.
  • the -t command limits how many threads the resolver will use simultaneously
  • -d overrides the system default DNS resolver and will use the specified IP address as the resolving server. Setting this to the authoritative DNS server of the target domain _ may _ increase resolution performance


Download Altdns