“The intelligence community watched closely when US embassies were besieged during the week of September 11, 2012 by protests against an anti-Islam film. Soon after the physical protests, an online campaign dubbed Operation Ababil emerged in solidarity by attacking US bank websites. The self-proclaimed Izz ad-Din al-Qassam Cyber Fighters hit targets with DDoS attacks that successfully knocked out the websites of numerous financial giants including Bank of America, Wells Fargo, PNC, and more.”
Source:Deconstructing the Al-Qassam Cyber Fighters Assault on US Banks | Analysis Intelligence