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Website Takedown with the "Slowloris DoS Attack"

By: Shaquib Izhar

April 12, 2018

A DoS attack is a type of attack where an attacker can suspend services of a host or a website by sending a large amount of traffic and making request constantly from two or more computer or by sending a large number of the packet which makes small servers overload and server goes crash and result "Destination unreachable."Here I am going to DOS using Perl base program name Slowloris developed by Robert "RSnake" Hansen. Slowloris is a very useful program which allows a single machine to take down another machine's web server with minimal bandwidth and side effects on unrelated services and ports. It keeps connection open of the target and keeps sending a request, and after some time some become unresponsive to another request which results in server down. It is straightforward to use this program for which I am going to give step by step tutorial below.STEP 1 As I said it's Perl base program, mostly I use this program on some Linux distro but I will use Windows this time so that lots of users can use this. So to run this program, you have to install Per on your computer so first download Perl from: HERESTEP 2: In this step, you have to copy some text from the Slowloris and paste it to your notepad but for saving time I have already done these steps for you, so you have to download this slowloris program from here: DOWNLOADSTEP 3: Save it to your c drive, for example, c:"slowloris."

STEP 4: Now go to command and type cd:

STEP 5 Now type slow.pl to run Slowloris.pl to check you have done the above steps correctly or not. If you have done the steps correctly, then you will see Slowloris.

STEP 4 OK now you have to choose your target as I am going to attack a vulnerable website, here you don't need to ping the site to get the IP addressSTEP 5 OK now we came to the main point in the command type "slow.pl -DNS www.yourtarget.com -port 80 -timeout 500 -num 500 -tcpto 5 -httpready "

Now Slowloris will start sending packets to your target.

And now after waiting some time the site has been taken down as you can see I am pinging to google to prove that my internet is working.

If you want to make it more powerful then run multiple Slowloris attacks as shown belowbut watch out for CPU heat and process

DISCLAIMER: This post is for educational purpose only. It depends on the user how do they use it for, I (and developers) are not responsible for any damage cause by the program that user did.