In order to confuse the target Web server as thoroughly as possible, Shteiman has included a number of different features in HULK, including the ability to hide the actual user agent and obfuscate the referrer for each request. In his own tests, Shteiman said that the attack tool had no trouble taking down a target server within a minute or so.
"Basically my test web server with 4gb of Ram running Microsoft IIS7 was brought to its knees under less than a minute, running all requests from a single host," Shteiman said.