Overview of a DDOS Program:
Developed by 4Chan-affiliated coders, the Low Orbit Ion Cannon (LOIC) can be used to launch DDOS attacks involving thousands of anonymous, volunteer users.
Using Windows, the DDOS program has a "hive-mind" feature that allows a hacker to point his local copy to an IRC server, permitting other hackers to control the targeting of LOIC clients.
LOIC runs in any browser, including smart phones, and makes it extremely difficult for authorities to identify specific hackers and prove their involvement.
The image below is a screen shot of the DDOS program.