Researchers from the University of Twente, Netherlands, looked at the Low Orbit Ion Cannon (LOIC), a DDoS tool being used by the umbrella group Anonymous. They found that the tool fails to shield the Internet Protocol (IP) address of computers running the tool. That could allow authorities to round up DDoS participants merely by analyzing the source of the junk traffic their computers sent to target Web pages, including those of Paypal, Mastercard and Visa. To date, there has only been one arrest directly linked to the DDoS attacks in defense of WIkileaks.
Source: https://threatpost.com/hacking-tool-used-anonymous-could-reveal-users-identity-121310/74770/