“As French police scoured Paris and surrounding areas in search of those responsible for Friday’s terrorist attacks on the French capital, a group of cyber activists took aim at the Islamic State’s online presence. The computer-hacker federation known as Anonymous claims to have disabled at least 5,500 pro-ISIS Twitter accounts and exposed thousands of the terror group’s supporters who use the social media site.”
Source: Anonymous’s Cyber War with ISIS Could Compromise Terrorism Intelligence – Scientific American