The number of DDoS and DoS attacks lasting more than one week doubled last year. Radware report: Server-based botnets represent a new and more powerful order in the DDoS environment. Encrypted layer attacks fly below the radar, especially troubling for financial services and e-commerce websites that rely heavily on HTTPS. In 2013, Radware recommends that organizations dedicate resources to creating a security war room equipped to dynamically respond to and handle persistent security attacks during all phases of an attack.”]
Source: https://www.csoonline.com/article/2135413/radware–week-plus-ddos-attacks-doubled-last-year.html