Report: 73% of global brands reported a DDoS attack in 2015, and over eight in 10 corporations were struck by multiple DDoS attacks. Nearly half of companies reported that an hour of outages related to DDoS racked up $100,000 in revenue loss. ThreatMetrix: Botnet attacks have evolved from just being large volume DDoS or spam attacks, to low-and-slow bots, designed to evade rate and security control measures and mimic trusted customer behavior. Attackers carry out coordinated DDoS strikes to “keep the IT departments guessing where and when the next attack will take place””]
Source: https://www.darkreading.com/attacks-breaches/the-growing-sophistication-of-distributed-attacks