Update README.md

Author: giovanifss

README.md

@@ -1,5 +1,88 @@
-# Dumb - Subdumain Bruteforcer
+# Dumb - Dumain Bruteforcer
 
-A tool to bruteforce subdumains!
+A tool to bruteforce dumains!
 
 ![Dumb](http://8449-presscdn-0-66.pagely.netdna-cdn.com/wp-content/uploads/2013/07/dumb.jpg)
+
+## How DUMB works:
+Dumb works with a masked dumain for substitution. The dumain can have as many masks as you want as long as you pass the according wordlists. For example:  
+
+#### Bruteforcing subdumains:
+Using the mask `DUMB.dumain.com` and the following wordlists:  
+```
+www
+ftp
+backoffice
+```
+Dumb will generate the following dumains for bruteforce:
+```
+www.dumain.com
+ftp.dumain.com
+backoffice.dumain.com
+```
+For subdumains, you can only pass `dumain.com` and dumb will understand as `DUMB.dumain.com`.
+
+#### Bruteforcing domain endings:
+Using the same principle, you can pass as mask `dumain.DUMB` with the following wordlist:
+```
+com
+net
+org
+```
+Dumb will generate the following dumains for bruteforce:
+```
+dumain.com
+dumain.net
+dumain.org
+```
+
+#### Bruteforcing everything:
+To bruteforce **everything** you can pass the mask as "DUMB.DUMB.DUMB" passing three wordlists:
+```
+wordlist1   wordlist2   wordlist3
+www         foo         com
+ftp         bar         net
+```
+Dumb will generate:
+```
+www.foo.com
+ftp.foo.com
+www.bar.com
+ftp.bar.com
+www.foo.net
+ftp.foo.net
+www.bar.net
+ftp.bar.net
+```
+
+## Usage:
+Dumb receives the dumain mask as first parameter and the wordlists following. The number of wordlists must match the number of masks in the dumain. For example:
+- One mask:  
+`$ dumb "DUMB.dumain.com" wordlists/foo.txt`
+- Two masks:  
+`$ dumb "DUMB.dumain.DUMB" wordlists/foo.txt wordlists/bar.txt`
+- Several masks:  
+`$ dumb "DUMB-DUMB-DUMB_DUMB.DUMB.DUMB" wordlists/foo_1.txt ... wordlists/foo_6.txt`
+
+## Docker:
+If you don't want to build from source, you can use the docker version: `docker run -it giovanifss/dumb "DUMB.dumain.com" subdomains.txt`  
+
+To work with local wordlists that aren't present inside the container, you can use docker volumes:  
+`docker run -v local/wordlist.txt:/opt/wordlist.txt -it giovanifss/dumb "DUMB.dumain.com" /opt/wordlist.txt`  
+
+## Building from source:
+If you want to build from source you will need [stack](https://docs.haskellstack.org/en/stable/README/):  
+Enter in the project directory and run `$ stack build`.  
+Note that some older versions of stack have some problems to build the project (Debian stack package, for example). Make sure you get the latest stack version.
+
+## Future features:
+Future planned features are:  
+- Argument parser support, for better configuration of the tool execution;
+- Post analysis of found dumains, generating statistics and metrics;
+
+## Performance:
+The tool performance will highly depend on your network connection. Usually, it should take less then 10 seconds to finish a subdumain burteforce with the `wordlists/subdomains.txt` wordlist.  
+
+If you have a good connection and think that the tool is slow, try changing the `1000` in the `splitDomains` function call, e.g. `mapM_ (MP.mapM_ (resolve rs)) (splitDomains 1000 allDomains)`, to a higher value.  
+
+Alternatively, you can change `mapM_ (MP.mapM_ (resolve rs)) (splitDomains 1000 allDomains)` to `MP.mapM_ (resolve rs) allDomains` to execute all the requests in parallel.