Something else happens when hacktivists group together: They commonly perform what's called a "Distributed Denial of Service," or DDoS, attack. With an increased number of participants, they are able to flood the targeted website with traffic so that the server becomes overloaded. As the site attempts to process the large volume of malicious traffic, it denies access for legitimate users and often crashes altogether.
The attacks have become automated, thus making them more powerful and harder to track, and have advanced in their techniques; however, the effect remains the same. Let us take a look at the recent "Operation Payback," which has gained notoriety in the past few months.
Operation Payback is a series of DoS attacks carried out by hacktivists. Their initial goal was to bring down anti-piracy sites, such as the recording and media companies that attempted to act against illegal file sharers. They even attacked law firms that threatened to bring the illegal downloaders to court. In the latest chain of activities, the attacks have started to target organizations that have spoken out against WikiLeak's activities or any other form of 'Internet censorship.' MasterCard, for example, was attacked by the hacktivist group "Anonymous" when it refused to process donations to the whistle-blowing site.
How does this group of hacktivists operate?
Hackers, in short order, build attack software designed to take down websites and services. This software is then made easily available for download by other hacktivists. Once installed on a user's machine, it sits idly waiting for the attack command, and when the time is ripe for the attack a 'wake-up' call is issued to the malware on the hacktivist's machine. At that stage, the machine will start spurting out the malicious traffic to the specific site. Using the power of the hacktivist community, the target is inundated with voluminous traffic that causes the servers to crash.
When looking at this specific group, we can see that social factors play a large part. As the activities of Operation Payback received more media attention, the number of hacktivists joining the specific hacktivist network increased.
Modern hacking, in general, is motivated by data theft. Stolen credentials, credit card numbers and so forth are highly valued on the black market. Data is the currency of cyber crime so staying invisible is essential. In contrast to other forms of cyber crime, hacktivism is not motivated by money and actively seeks to gain as much attention as possible; high visibility is the key. Hacktivists are motivated by revenge, politics, ideology, protest and a desire to humiliate their victims-what would be the point of embarrassing someone if they didn't know who performed the attack?
Another attention-grabbing DDoS attack was executed in June 2009 by hacktivists protesting against the Iranian elections. In this attack, hacktivists operated from outside of Iran and targeted government and other state-sponsored websites. As a result, the Iranian government blocked access to different social network sites to prevent netizens from providing coverage regarding the current state of affairs on the street.