On April 9, 2016, the Iranian hacker group Danger Team announced that Alireza Black Hat would become the group's new leader after the departure of Nima Danger following a public feud between Danger Team and MIhanhack Security Team. The announcement of the leadership change was followed by a mass defacement of Brazilian websites, which featured the above image.
Source: Irancybernews.org, April 9, 2016.