> For the complete documentation index, see [llms.txt](https://kathan19.gitbook.io/howtohunt/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kathan19.gitbook.io/howtohunt/recon/subdomain_enumeration.md). # Subdomain Enumeration ## Subdomain Enumeration Well, subdomain enumeration is important when you are hunting on wildcard enable scope programs. If you are able to get unique subdomains that other miss then it's a good chance for you to get some bugs ## General Methodology * Passive * Active * Permutation ### Passive In this stage you have to use as much resources as you can to passivly gather subdomains Now a days it's not that much hard to do with community standard tools that usages API keys #### Tools * Subfinder * Amass * Assetfinder * Findomain ### Active In this stage you have to perform bruteforcing on your target host to see if the word from your wordlist resolve as valid subdomain or not #### Tools * ShuffleDNS * Aiodnsbrute ### Permutation In this stage you have to play around the subdomains. Now do changed with the words and see still it resolve as valid or not ### Portscan Convert domains into ip address ```bash while read l; do ip=$(dig +short $l|grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b"|head -1);echo "[+] '$l' => $ip";echo $ip >> ips.txt;done < domains.txt ``` we will use masscan for faster results > masscan -p1-65535 -iL ips.txt --max-rate 1800 -oG output.log or you can use [Naabu](https://github.com/projectdiscovery/naabu), [RustScan](https://github.com/RustScan/RustScan/). #### Tools * AltDNS * DNSGen + ShuffleDNS ### Reference & Resources Theres a lot you can do. For now just mentioning communty standard approaches. Will be updating it regularly depending on the methodology comes out. ### Framework An automated framework can be used to automate those whole workflow * [SEF](https://github.com/remonsec/SEF) *** ### Author [Mehedi Hasan Remon](https://twitter.com/remonsec) [Rishi Choudhary](https://twitter.com/0xRyuk) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://kathan19.gitbook.io/howtohunt/recon/subdomain_enumeration.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.