The source for one version of LOIC can be found on GitHub: https://github.com/NewEraCracker/LOIC/ https://github.com/NewEraCracker/LOIC/ A quick skim-read of

The source for one version of LOIC can be found on GitHub: https://github.com/NewEraCracker/LOIC/ https://github.com/NewEraCracker/LOIC/ A quick skim-read of the code mentioned in the post shows that this version seems to be different, specifically: https://github.com/NewEraCracker/LOIC/blob/master/HTTPFlooder.cs#L70 https://github.com/NewEraCracker/LOIC/blob/master/HTTPFloode... if (random == true) buf = System.Text.Encoding.ASCII.GetBytes( String.Format("GET {0}{1} HTTP/1.1{2}Host: {3}{2}{2}{2}", Subsite, new Functions().RandomString(), Environment.NewLine, Host)); else buf = System.Text.Encoding.ASCII.GetBytes( String.Format("GET {0} HTTP/1.1{1}Host: {2}{1}{1}{1}", Subsite, Environment.NewLine, Host)); (botched indentation is my own) The Host header mentioned in the blog post is present, the protocol is now HTTP/1.1 and random string appears to be an attempt to defeat a simple packet matching algorithm. I doubt many legitimate requests these days come without a User-Agent header, though...