American Express confirms it was hit by a distributed-denial-of-service attack on March 28. The attack disrupted online-account access for about two hours during the late afternoon. The card brand did not confirm whether the strike was linked to Izz ad-Din al-Qassam Cyber Fighters, the hacktivist group that’s been targeting U.S. banks since mid-September. The group claims credit for this attack, as well as an unconfirmed attack against Bank of America.”]
Source: https://www.cuinfosecurity.com/ddos-strikes-american-express-a-5645