A group calling itself the “Fatal Error Crew” took credit for the apparent attack in a Twitter posting. In April, the ruling Workers Party had its website knocked out by a hacker for 24 hours. Federal police will investigate anyone responsible for attempts to block the security of the president’s office, a spokesman says. The attack on Sunday was being investigated by the Federal Data Processing Service (Serpro), sources say. The federal police say there was an intentional flood of attempts to access presidencia.gov and brasil.gov.
Source: https://thehackernews.com/2011/01/police-probe-hacker-attack-on-brazil.html