Brute Dirs

Vulnerable Application

Web sites & other HTTP based applications may be vulnerable to directory brute forcing. This module executes a directory brute force on a web server, in order to discover locations on the web server for further analysis. This is not the same as using a word dictionary - this module uses string permutations instead.

Install

Any web server that serves directories can be used. This module can support different authentication methods, which will depend on the type of web server used.

Verification Steps

1. Start msfconsole
2. Do: use auxiliary/scanner/http/brute_dirs
3. Do: set rhosts [IPs]
4. Do: run
5. As the module executes you should see a list of directories that are being served up by the web server.

Options

DELAY

The delay between connections, per thread, in milliseconds. Using this will reduce the speed of the module, which may be useful to prevent any rate limiting or web application firewalls from preventing further scanning. Defaults to 0.

FORMAT

The comma separated list of expected directory formats used to determine the order of brute force attempts. Defaults to a,aa,aaa.

Use the following format specifiers:

The default value will search a,aa,aaa will search for 1 character directories, then 2 character directories, then 3 character directories.

JITTER

The delay jitter factor (maximum value by which to +/- DELAY) in milliseconds. Using jitter ensures requests have a random amount of additional delay. This is also useful for evading brute force prevention. Defaults to 0.

PATH

The path to starting identification of directories from. Defaults to /.

THREADS

The number of concurrent threads (max one per host). Defaults to 1.

TIMEOUT

The socket connect/read timeout in seconds. Defaults to 20.

ErrorCode

The expected HTTP code for non existent directories. Defaults to 404.

HTTP404Sigs

Path of 404 signatures to use to identify 'file not found' strings in website output, even if a successful HTTP Status Code is returned by the server. Defaults to [Metasploit data directory]/wmap/wmap_404s.txt.

Scenarios

HTTP directory brute force on a specific port

Identify an open HTTP port on a target web server by using nmap:

nmap -p8080 192.168.2.3
.
.
.
PORT     STATE SERVICE
8080/tcp   open  http

Configure the brute_dirs module to use the identified IP address and port number:

msf > use auxiliary/scanner/http/brute_dirs 
msf auxiliary(scanner/http/brute_dirs) > set RHOSTS 192.168.2.3
msf auxiliary(scanner/http/brute_dirs) > set RPORT 8080
RHOSTS => 192.168.2.3
msf auxiliary(scanner/http/brute_dirs) > run

[*] Using code '404' as not found.
[+] Found http://192.168.2.3:8080/dav/ 200
[+] Found http://192.168.2.3:8080/img/ 200
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

Testing against multiple hosts using a CIDR

msf > use auxiliary/scanner/http/brute_dirs
msf auxiliary(scanner/http/brute_dirs) > show options
    ... show and set options ...
msf auxiliary(scanner/http/brute_dirs) > set RHOSTS 192.168.2.1/24
msf auxiliary(scanner/http/brute_dirs) > run

Custom format to find specifically formatted directories

A format string of Aaaaad will search for 6 character directories, starting with a capital letter and ending in a digit. E.g.

msf > use auxiliary/scanner/http/brute_dirs 
msf auxiliary(scanner/http/brute_dirs) > set RHOSTS 192.168.2.3
msf auxiliary(scanner/http/brute_dirs) > set FORMAT 'Aaaaad'
msf auxiliary(scanner/http/brute_dirs) > run