Afuzz – An automated web path fuzzing tool

Finding security holes is a lot like finding hidden treasures in the world of bug bounty hunts. “Afuzz” turns out to be a useful tool in this search because it provides an automatic way to test web paths that is perfect for bug reward projects. Afuzz was created by RapidDNS and is unique because it can intelligently adapt to the development language of selected websites. This makes it easier to find security holes.

This article goes into detail about what Afuzz can do and how it works. It focuses on some of its unique features, such as creating extensions based on language, filtering by blacklists and whitelists, and advanced error page analysis. Afuzz is a big step forward in automatic web path fuzzing tools because it supports HTTP2 and lets you do statistical analysis on scan results.

As bug bounty hunting changes, security experts and ethical hackers will need tools like Afuzz more and more. This guide will show you how to install, use, and get the most out of Afuzz, showing you how it can revolutionize your bug bounty tools. It doesn’t matter how experienced you are as a hunter; knowing what Afuzz can do will greatly improve your ability to find hidden flaws in web apps.

Afuzz is an automated web path fuzzing tool for the Bug Bounty projects

Features

Afuzz automatically detects the development language used by the website, and generates extensions according to the language
Uses blacklist to filter invalid pages
Uses whitelist to find content that bug bounty hunters are interested in in the page
filters random content in the page
judges 404 error pages in multiple ways
perform statistical analysis on the results after scanning to obtain the final result.
support HTTP2

Installation

git clone https://github.com/rapiddns/Afuzz.git
cd Afuzz
python setup.py install

pip install afuzz

Run

afuzz -u http://testphp.vulnweb.com -t 30

Result

Table

+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|                                                                                    http://testphp.vulnweb.com/                                                                                    |
+-----------------------------+---------------------+--------+-----------------------------------+-----------------------+--------+--------------------------+-------+-------+-----------+----------+
|            target           |         path        | status |              redirect             |         title         | length |       content-type       | lines | words |    type   |   mark   |
+-----------------------------+---------------------+--------+-----------------------------------+-----------------------+--------+--------------------------+-------+-------+-----------+----------+
| http://testphp.vulnweb.com/ | .idea/workspace.xml |  200   |                                   |                       | 12437  |         text/xml         |  217  |  774  |   check   |          |
| http://testphp.vulnweb.com/ |        admin        |  301   | http://testphp.vulnweb.com/admin/ | 301 Moved Permanently |  169   |        text/html         |   8   |   11  |   folder  |   30x    |
| http://testphp.vulnweb.com/ |      login.php      |  200   |                                   |       login page      |  5009  |        text/html         |  120  |  432  |   check   |          |
| http://testphp.vulnweb.com/ |     .idea/.name     |  200   |                                   |                       |   6    | application/octet-stream |   1   |   1   |   check   |          |
| http://testphp.vulnweb.com/ |    .idea/vcs.xml    |  200   |                                   |                       |  173   |         text/xml         |   8   |   13  |   check   |          |
| http://testphp.vulnweb.com/ |        .idea/       |  200   |                                   |    Index of /.idea/   |  937   |        text/html         |   14  |   46  | whitelist | index of |
| http://testphp.vulnweb.com/ |       cgi-bin/      |  403   |                                   |     403 Forbidden     |  276   |        text/html         |   10  |   28  |   folder  |   403    |
| http://testphp.vulnweb.com/ | .idea/encodings.xml |  200   |                                   |                       |  171   |         text/xml         |   6   |   11  |   check   |          |
| http://testphp.vulnweb.com/ |      search.php     |  200   |                                   |         search        |  4218  |        text/html         |  104  |  364  |   check   |          |
| http://testphp.vulnweb.com/ |     product.php     |  200   |                                   |    picture details    |  4576  |        text/html         |  111  |  377  |   check   |          |
| http://testphp.vulnweb.com/ |        admin/       |  200   |                                   |    Index of /admin/   |  248   |        text/html         |   8   |   16  | whitelist | index of |
| http://testphp.vulnweb.com/ |        .idea        |  301   | http://testphp.vulnweb.com/.idea/ | 301 Moved Permanently |  169   |        text/html         |   8   |   11  |   folder  |   30x    |
+-----------------------------+---------------------+--------+-----------------------------------+-----------------------+--------+--------------------------+-------+-------+-----------+----------+```

Json

{
    "result": [
        {
            "target": "http://testphp.vulnweb.com/",
            "path": ".idea/workspace.xml",
            "status": 200,
            "redirect": "",
            "title": "",
            "length": 12437,
            "content_type": "text/xml",
            "lines": 217,
            "words": 774,
            "type": "check",
            "mark": "",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/.idea/workspace.xml"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": "admin",
            "status": 301,
            "redirect": "http://testphp.vulnweb.com/admin/",
            "title": "301 Moved Permanently",
            "length": 169,
            "content_type": "text/html",
            "lines": 8,
            "words": 11,
            "type": "folder",
            "mark": "30x",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/admin"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": "login.php",
            "status": 200,
            "redirect": "",
            "title": "login page",
            "length": 5009,
            "content_type": "text/html",
            "lines": 120,
            "words": 432,
            "type": "check",
            "mark": "",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/login.php"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": ".idea/.name",
            "status": 200,
            "redirect": "",
            "title": "",
            "length": 6,
            "content_type": "application/octet-stream",
            "lines": 1,
            "words": 1,
            "type": "check",
            "mark": "",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/.idea/.name"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": ".idea/vcs.xml",
            "status": 200,
            "redirect": "",
            "title": "",
            "length": 173,
            "content_type": "text/xml",
            "lines": 8,
            "words": 13,
            "type": "check",
            "mark": "",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/.idea/vcs.xml"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": ".idea/",
            "status": 200,
            "redirect": "",
            "title": "Index of /.idea/",
            "length": 937,
            "content_type": "text/html",
            "lines": 14,
            "words": 46,
            "type": "whitelist",
            "mark": "index of",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/.idea/"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": "cgi-bin/",
            "status": 403,
            "redirect": "",
            "title": "403 Forbidden",
            "length": 276,
            "content_type": "text/html",
            "lines": 10,
            "words": 28,
            "type": "folder",
            "mark": "403",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/cgi-bin/"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": ".idea/encodings.xml",
            "status": 200,
            "redirect": "",
            "title": "",
            "length": 171,
            "content_type": "text/xml",
            "lines": 6,
            "words": 11,
            "type": "check",
            "mark": "",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/.idea/encodings.xml"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": "search.php",
            "status": 200,
            "redirect": "",
            "title": "search",
            "length": 4218,
            "content_type": "text/html",
            "lines": 104,
            "words": 364,
            "type": "check",
            "mark": "",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/search.php"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": "product.php",
            "status": 200,
            "redirect": "",
            "title": "picture details",
            "length": 4576,
            "content_type": "text/html",
            "lines": 111,
            "words": 377,
            "type": "check",
            "mark": "",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/product.php"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": "admin/",
            "status": 200,
            "redirect": "",
            "title": "Index of /admin/",
            "length": 248,
            "content_type": "text/html",
            "lines": 8,
            "words": 16,
            "type": "whitelist",
            "mark": "index of",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/admin/"
        },
        {
            "target": "http://testphp.vulnweb.com/",
            "path": ".idea",
            "status": 301,
            "redirect": "http://testphp.vulnweb.com/.idea/",
            "title": "301 Moved Permanently",
            "length": 169,
            "content_type": "text/html",
            "lines": 8,
            "words": 11,
            "type": "folder",
            "mark": "30x",
            "subdomain": "testphp.vulnweb.com",
            "depth": 0,
            "url": "http://testphp.vulnweb.com/.idea"
        }
    ],
    "total": 12,
    "target": "http://testphp.vulnweb.com/"
}

Wordlists (IMPORTANT)

Summary:

Wordlist is a text file, each line is a path.
About extensions, Afuzz replaces the %EXT% keyword with extensions from -e flag.If no flag -e, the default is used.
Generate a dictionary based on domain names. Afuzz replaces %subdomain% with host, %rootdomain% with root domain, %sub% with subdomain, and %domain% with domain. And generated according to %ext%

Examples:

Normal extensions

index.%EXT%

Passing asp and aspx extensions will generate the following dictionary:

index
index.asp
index.aspx

host

%subdomain%.%ext%
%sub%.bak
%domain%.zip
%rootdomain%.zip

Passing https://test-www.hackerone.com and php extension will genrate the following dictionary:

test-www.hackerone.com.php
test-www.zip
test.zip
www.zip
testwww.zip
hackerone.zip
hackerone.com.zip

Options

    #     ###### ### ###  ######  ######
    #      #   #  #   #   #   #   #   #
   # #     # #    #   #   #  #    #  #
   # #     ###    #   #     #       #
  #  #    #  #   #   #      #       #
  #####   #      #   #     #  #    #  #
 #    #   #      #   #    #   #   #   #
###  ### ###      ###    ######  ######



usage: afuzz [options]

An Automated Web Path Fuzzing Tool.
By RapidDNS (https://rapiddns.io)

options:
  -h, --help            show this help message and exit
  -u URL, --url URL     Target URL
  -o OUTPUT, --output OUTPUT
                        Output file
  -e EXTENSIONS, --extensions EXTENSIONS
                        Extension list separated by commas (Example: php,aspx,jsp)
  -t THREAD, --thread THREAD
                        Number of threads
  -d DEPTH, --depth DEPTH
                        Maximum recursion depth
  -w WORDLIST, --wordlist WORDLIST
                        wordlist
  -f, --fullpath        fullpath
  -p PROXY, --proxy PROXY
                        proxy, (ex:http://127.0.0.1:8080)

How to use

Some examples for how to use Afuzz – those are the most common arguments. If you need all, just use the -h argument.

Simple usage

afuzz -u https://target

afuzz -e php,html,js,json -u https://target

afuzz -e php,html,js -u https://target -d 3

Threads

The thread number (-t | –threads) reflects the number of separated brute force processes. And so the bigger the thread number is, the faster afuzz runs. By default, the number of threads is 10, but you can increase it if you want to speed up the progress.

In spite of that, the speed still depends a lot on the response time of the server. And as a warning, we advise you to keep the threads number not too big because it can cause DoS.

afuzz -e aspx,jsp,php,htm,js,bak,zip,txt,xml -u https://target -t 50

Varshini

Tamil has a great interest in the fields of Cyber Security, OSINT, and CTF projects. Currently, he is deeply involved in researching and publishing various security tools with Kali Linux Tutorials, which is quite fascinating.