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GoBuster : Directory/File, DNS & VHost Busting Tool Written In Go

Gobuster is a tool used to brute-force like URIs (directories and files) in web sites, DNS subdomains (with wildcard support) and Virtual Host names on target web servers.

WHY!?

  • Something that didn’t have a fat Java GUI (console FTW).
  • To build something that just worked on the command line.
  • Something that did not do recursive brute force.
  • Something that allowed me to brute force folders and multiple extensions at once.
  • Something that compiled to native on multiple platforms.
  • Something that was faster than an interpreted script (such as Python).
  • Something that didn’t require a runtime.
  • Use something that was good with concurrency (hence Go).
  • To build something in Go that wasn’t totally useless.

But it’s shit! And your implementation sucks!

Yes, you’re probably correct. Feel free to:

  • Not use it.
  • Show me how to do it better.

Changes in 3.0

  • New CLI options so modes are strictly seperated (-m is now gone!)
  • Performance Optimizations and better connection handling
  • Ability to bruteforce vhost names
  • Option to supply custom HTTP headers

Available Modes

  • dir – the classic directory brute-forcing mode
  • dns – DNS subdomain brute-forcing mode
  • vhost – virtual host brute-forcing mode (not the same as DNS!)

Built-in Help

Help is built-in!

  • gobuster help – outputs the top-level help.
  • gobuster help <mode> – outputs the help specific to that mode.

DNS Mode Help

Usage:
gobuster dns [flags]

Flags:
-d, –domain string The target domain
-h, –help help for dns
-r, –resolver string Use custom DNS server (format server.com or server.com:port)
-c, –showcname Show CNAME records (cannot be used with ‘-i’ option)
-i, –showips Show IP addresses
–timeout duration DNS resolver timeout (default 1s)
–wildcard Force continued operation when wildcard found

Global Flags:
-z, –noprogress Don’t display progress
-o, –output string Output file to write results to (defaults to stdout)
-q, –quiet Don’t print the banner and other noise
-t, –threads int Number of concurrent threads (default 10)
–delay duration Time each thread waits between requests (e.g. 1500ms)
-v, –verbose Verbose output (errors)
-w, –wordlist string Path to the wordlist

DIR Mode Options

Usage:
gobuster dir [flags]

Flags:
-f, –addslash Append / to each request
-c, –cookies string Cookies to use for the requests
-e, –expanded Expanded mode, print full URLs
-x, –extensions string File extension(s) to search for
-r, –followredirect Follow redirects
-H, –headers stringArray Specify HTTP headers, -H ‘Header1: val1’ -H ‘Header2: val2’
-h, –help help for dir
-l, –includelength Include the length of the body in the output
-k, –insecuressl Skip SSL certificate verification
-n, –nostatus Don’t print status codes
-P, –password string Password for Basic Auth
-p, –proxy string Proxy to use for requests [http(s)://host:port]
-s, –statuscodes string Positive status codes (will be overwritten with statuscodesblacklist if set) (default “200,204,301,302,307,401,403”)
-b, –statuscodesblacklist string Negative status codes (will override statuscodes if set)
–timeout duration HTTP Timeout (default 10s)
-u, –url string The target URL
-a, –useragent string Set the User-Agent string (default “gobuster/3.0.1”)
-U, –username string Username for Basic Auth
–wildcard Force continued operation when wildcard found

Global Flags:
-z, –noprogress Don’t display progress
-o, –output string Output file to write results to (defaults to stdout)
-q, –quiet Don’t print the banner and other noise
-t, –threads int Number of concurrent threads (default 10)
–delay duration Time each thread waits between requests (e.g. 1500ms)
-v, –verbose Verbose output (errors)
-w, –wordlist string Path to the wordlist

Vhost Mode Options

Usage:
gobuster vhost [flags]

Flags:
-c, –cookies string Cookies to use for the requests
-r, –followredirect Follow redirects
-H, –headers stringArray Specify HTTP headers, -H ‘Header1: val1’ -H ‘Header2: val2’
-h, –help help for vhost
-k, –insecuressl Skip SSL certificate verification
-P, –password string Password for Basic Auth
-p, –proxy string Proxy to use for requests [http(s)://host:port]
–timeout duration HTTP Timeout (default 10s)
-u, –url string The target URL
-a, –useragent string Set the User-Agent string (default “gobuster/3.0.1”)
-U, –username string Username for Basic Auth

Global Flags:
-z, –noprogress Don’t display progress
-o, –output string Output file to write results to (defaults to stdout)
-q, –quiet Don’t print the banner and other noise
-t, –threads int Number of concurrent threads (default 10)
–delay duration Time each thread waits between requests (e.g. 1500ms)
-v, –verbose Verbose output (errors)
-w, –wordlist string Path to the wordlist

Easy Installation

Binary Releases

We are now shipping binaries for each of the releases so that you don’t even have to build them yourself! How wonderful is that!

If you’re stupid enough to trust binaries that I’ve put together, you can download them from the releases page.

Using go get

If you have a Go environment ready to go, it’s as easy as:

go get github.com/OJ/gobuster

Building From Source

Since this tool is written in Go you need to install the Go language/compiler/etc. Full details of installation and set up can be found on the Go language website. Once installed you have two options.

Compiling

gobuster now has external dependencies, and so they need to be pulled in first:

go get && go build

This will create a gobuster binary for you. If you want to install it in the $GOPATH/bin folder you can run:

go install

If you have all the dependencies already, you can make use of the build scripts:

  • make – builds for the current Go configuration (ie. runs go build).
  • make windows – builds 32 and 64 bit binaries for windows, and writes them to the build subfolder.
  • make linux – builds 32 and 64 bit binaries for linux, and writes them to the build subfolder.
  • make darwin – builds 32 and 64 bit binaries for darwin, and writes them to the build subfolder.
  • make all – builds for all platforms and architectures, and writes the resulting binaries to the build subfolder.
  • make clean – clears out the build subfolder.
  • make test – runs the tests.

Wordlists via STDIN

Wordlists can be piped into gobuster via stdin by providing a - to the -w option:

hashcat -a 3 –stdout ?l | gobuster dir -u https://mysite.com -w –

Note: If the -w option is specified at the same time as piping from STDIN, an error will be shown and the program will terminate.

Examples

dir Mode

Command line might look like this:

gobuster dir -u https://mysite.com/path/to/folder -c ‘session=123456’ -t 50 -w common-files.txt -x .php,.html

Default options looks like this:

gobuster dir -u https://buffered.io -w ~/wordlists/shortlist.txt
======================================================
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
======================================================
[+] Mode : dir
[+] Url/Domain : https://buffered.io/
[+] Threads : 10
[+] Wordlist : /home/oj/wordlists/shortlist.txt
[+] Status codes : 200,204,301,302,307,401,403
[+] User Agent : gobuster/3.0.1
[+] Timeout : 10s
======================================================
2019/06/21 11:49:43 Starting gobuster
======================================================
/categories (Status: 301)
/contact (Status: 301)
/posts (Status: 301)
/index (Status: 200) ======================================================
2019/06/21 11:49:44 Finished ======================================================

Default options with status codes disabled looks like this:

gobuster dir -u https://buffered.io -w ~/wordlists/shortlist.txt -n
========================================================
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
========================================================
[+] Mode : dir
[+] Url/Domain : https://buffered.io/
[+] Threads : 10
[+] Wordlist : /home/oj/wordlists/shortlist.txt
[+] Status codes : 200,204,301,302,307,401,403
[+] User Agent : gobuster/3.0.1
[+] No status : true
[+] Timeout : 10s
========================================================
2019/06/21 11:50:18 Starting gobuster
========================================================
/categories
/contact
/index
/posts
========================================================
2019/06/21 11:50:18 Finished
========================================================

Verbose output looks like this:

gobuster dir -u https://buffered.io -w ~/wordlists/shortlist.txt -v
*************************************************************
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
**************************************************************
[+] Mode : dir
[+] Url/Domain : https://buffered.io/
[+] Threads : 10
[+] Wordlist : /home/oj/wordlists/shortlist.txt
[+] Status codes : 200,204,301,302,307,401,403
[+] User Agent : gobuster/3.0.1
[+] Verbose : true
[+] Timeout : 10s
*************************************************************
2019/06/21 11:50:51 Starting gobuster
*************************************************************
Missed: /alsodoesnotexist (Status: 404)
Found: /index (Status: 200)
Missed: /doesnotexist (Status: 404)
Found: /categories (Status: 301)
Found: /posts (Status: 301)
Found: /contact (Status: 301)
*************************************************************
2019/06/21 11:50:51 Finished
*************************************************************

Example showing content length:

gobuster dir -u https://buffered.io -w ~/wordlists/shortlist.txt -l
*************************************************************
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
**************************************************************
[+] Mode : dir
[+] Url/Domain : https://buffered.io/
[+] Threads : 10
[+] Wordlist : /home/oj/wordlists/shortlist.txt
[+] Status codes : 200,204,301,302,307,401,403
[+] User Agent : gobuster/3.0.1
[+] Show length : true
[+] Timeout : 10s
*************************************************************
2019/06/21 11:51:16 Starting gobuster
*************************************************************
/categories (Status: 301) [Size: 178]
/posts (Status: 301) [Size: 178]
/contact (Status: 301) [Size: 178]
/index (Status: 200) [Size: 51759]
*************************************************************
2019/06/21 11:51:17 Finished
*************************************************************

Quiet output, with status disabled and expanded mode looks like this (“grep mode”):

gobuster dir -u https://buffered.io -w ~/wordlists/shortlist.txt -q -n -e
https://buffered.io/index
https://buffered.io/contact
https://buffered.io/posts
https://buffered.io/categories

DNS Mode

Command line might look like this:

gobuster dns -d mysite.com -t 50 -w common-names.txt

Normal sample run goes like this:

gobuster dns -d google.com -w ~/wordlists/subdomains.txt
**********************************************************
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
**********************************************************
[+] Mode : dns
[+] Url/Domain : google.com
[+] Threads : 10
[+] Wordlist : /home/oj/wordlists/subdomains.txt
**********************************************************
2019/06/21 11:54:20 Starting gobuster
Found: chrome.google.com
Found: ns1.google.com
Found: admin.google.com
Found: www.google.com
Found: m.google.com
Found: support.google.com
Found: translate.google.com
Found: cse.google.com
Found: news.google.com
Found: music.google.com
Found: mail.google.com
Found: store.google.com
Found: mobile.google.com
Found: search.google.com
Found: wap.google.com
Found: directory.google.com
Found: local.google.com
Found: blog.google.com
**********************************************************
2019/06/21 11:54:20 Finished
**********************************************************

Show IP sample run goes like this:

gobuster dns -d google.com -w ~/wordlists/subdomains.txt -i
*****************************************************************
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
*****************************************************************
[+] Mode : dns
[+] Url/Domain : google.com
[+] Threads : 10
[+] Wordlist : /home/oj/wordlists/subdomains.txt
***************************************************************** 2019/06/21 11:54:54 Starting gobuster
***************************************************************** Found: www.google.com [172.217.25.36, 2404:6800:4006:802::2004]
Found: admin.google.com [172.217.25.46, 2404:6800:4006:806::200e]
Found: store.google.com [172.217.167.78, 2404:6800:4006:802::200e]
Found: mobile.google.com [172.217.25.43, 2404:6800:4006:802::200b]
Found: ns1.google.com [216.239.32.10, 2001:4860:4802:32::a]
Found: m.google.com [172.217.25.43, 2404:6800:4006:802::200b]
Found: cse.google.com [172.217.25.46, 2404:6800:4006:80a::200e]
Found: chrome.google.com [172.217.25.46, 2404:6800:4006:802::200e]
Found: search.google.com [172.217.25.46, 2404:6800:4006:802::200e]
Found: local.google.com [172.217.25.46, 2404:6800:4006:80a::200e]
Found: news.google.com [172.217.25.46, 2404:6800:4006:802::200e]
Found: blog.google.com [216.58.199.73, 2404:6800:4006:806::2009]
Found: support.google.com [172.217.25.46, 2404:6800:4006:802::200e]
Found: wap.google.com [172.217.25.46, 2404:6800:4006:802::200e]
Found: directory.google.com [172.217.25.46, 2404:6800:4006:802::200e]
Found: translate.google.com [172.217.25.46, 2404:6800:4006:802::200e]
Found: music.google.com [172.217.25.46, 2404:6800:4006:802::200e]
Found: mail.google.com [172.217.25.37, 2404:6800:4006:802::2005]
****************************************************************
2019/06/21 11:54:55 Finished
*****************************************************************

Base domain validation warning when the base domain fails to resolve. This is a warning rather than a failure in case the user fat-fingers while typing the domain.

gobuster dns -d yp.to -w ~/wordlists/subdomains.txt -i
****************************************************************
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
****************************************************************
[+] Mode : dns
[+] Url/Domain : yp.to
[+] Threads : 10
[+] Wordlist : /home/oj/wordlists/subdomains.txt
****************************************************************
2019/06/21 11:56:43 Starting gobuster
2019/06/21 11:56:53 [-] Unable to validate base domain: yp.to
****************************************************************
Found: cr.yp.to [131.193.32.108, 131.193.32.109]
****************************************************************
2019/06/21 11:56:53 Finished

Wildcard DNS is also detected properly:

gobuster dns -d 0.0.1.xip.io -w ~/wordlists/subdomains.txt
***************************************************************
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
***************************************************************
[+] Mode : dns
[+] Url/Domain : 0.0.1.xip.io
[+] Threads : 10
[+] Wordlist : /home/oj/wordlists/subdomains.txt
***************************************************************
2019/06/21 12:13:48 Starting gobuster
2019/06/21 12:13:48 [-] Wildcard DNS found. IP address(es): 1.0.0.0
2019/06/21 12:13:48 [!] To force processing of Wildcard DNS, specify the ‘–wildcard’ switch.
***************************************************************
2019/06/21 12:13:48 Finished

If the user wants to force processing of a domain that has wildcard entries, use --wildcard:

gobuster dns -d 0.0.1.xip.io -w ~/wordlists/subdomains.txt –wildcard
*************************************************************
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
*************************************************************
[+] Mode : dns
[+] Url/Domain : 0.0.1.xip.io
[+] Threads : 10
[+] Wordlist : /home/oj/wordlists/subdomains.txt
************************************************************
2019/06/21 12:13:51 Starting gobuster
2019/06/21 12:13:51 [-] Wildcard DNS found. IP address(es): 1.0.0.0
Found: 127.0.0.1.xip.io
*************************************************************
Found: test.127.0.0.1.xip.io
*************************************************************
2019/06/21 12:13:53 Finished

Vhost Mode

Command line might look like this:

gobuster vhost -u https://mysite.com -w common-vhosts.txt

Normal sample run goes like this:

gobuster vhost -u https://mysite.com -w common-vhosts.txt
************************************************************
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
************************************************************
[+] Url: https://mysite.com
[+] Threads: 10
[+] Wordlist: common-vhosts.txt
[+] User Agent: gobuster/3.0.1
[+] Timeout: 10s
************************************************************
2019/06/21 08:36:00 Starting gobuster
************************************************************
Found: www.mysite.com
Found: piwik.mysite.com
Found: mail.mysite.com
************************************************************
2019/06/21 08:36:05 Finished