Using remote file include (RFI), SQL injections, and cross-site scripting, appeared to be key to LulzSec’s 50-day hacking spree. These vulnerabilities have been extensively analyzed and detailed by security experts. But RFI–a “not widely discussed” type of attack, according to Imperva–is a different story. According to the leaked chat logs, a member Kayla said that he or she “used to load about 8,000 RFI with usp flooder crushed most server””]
Source: https://www.darkreading.com/attacks-breaches/lulzsec-s-top-3-hacking-tools-deconstructed