1、R E P O R TPAGE 1 W H I T E P A P E R Table of Contents Key Findings.1 Global DDoS Attack Trends.2 Since the first terabit-class attack hurled five years ago,the number of DDoS attacks has been surging for two consecutive years.2 The main victim industries are beginning to diversify,but the gaming i

2、ndustry still tops the target list of attackers 4 Southeast Asia becomes a hot target of attacks.5 Botnet C&C servers are mainly distributed in North America and Europe.5 China is one of the main attack sources.5 China,Southeast Asia,Europe,and North America have the largest number of bots.6 DDoS th

3、reats may become the preferred extortion method of cybercriminal gangs.6 Attack Vectors.7 Botnets attack before vulnerabilities are repaired.7 DDoS attacks larger than 100 Gbps become diversified.7 The sources of reflection DDoS attacks are correlated with the speed and scale of IoT development.7 Th

4、e preference of UDP reflection attacks is proportional to the amplification ratio.8 The TCP reflection attack in 2021 is U-shaped.9 Carpet-bombing attacks and hit-and-run attacks are frequently used.9 Botnets.11 Major families of DDoS botnets.11 Underground cybercriminal gangs strengthened DDoS atta

5、cks by propagating botnets.12 About NSFOCUS Cloud DPS.13 About Tencent Cloud T-Sec DDoS Protection.13(*Unless otherwise specified,the data in this report is provided by NSFOCUS BotHunter and Tencent Cloud T-Sec DDoS Protection)R E P O R TPAGE 2 Global DDoS Attack Trends Since the first terabit-class

6、 attack hurled five years ago,the number of DDoS attacks has been surging for two consecutive years.As the COVID-19 pandemic continues to wreak havoc on travel,social gathering,business trip,sports,retail,and other traditional offline activities,online business,such as live streaming,social media,ga