Key metrics from the 1H 2021 Netscout Threat Intelligence Report
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Taiwan

The massive shift to online life triggered by the COVID-19 pandemic prompted record-breaking levels of innovation by threat actors, and NETSCOUT’s ATLAS Security Engineering and Response Team (ASERT) expects this long tail of attacker innovation to last well into 2021.

Bad actors launched approximately 5.4 million DDoS attacks in 1H 2021—yet another record-breaking number. In particular, attackers launched unprecedented numbers of DDoS attacks in the first quarter, boosting attack frequency by 20 percent over the same time period in 2020. Meanwhile, adversaries discovered or weaponized seven UDP reflection/amplification DDoS attack vectors and developed adaptive multivector attacks specifically tailored to exploit vulnerabilities of their targets. Vital components of the connectivity supply chain came under increased attack, while ransomware gangs added triple-extortion DDoS tactics to their repertoire and the Fancy Lazarus threat actor launched a new DDoS extortion campaign.

Max Multivector Attack

Max number of vectors seen in a single attack

20

Attack Vectors Used

1. Chargen amplification
2. DNS
3. DNS amplification
4. ICMP
5. ISAKMP
6. L2TP amplification
7. MDNS amplification
8. Memcached amplification
9. MSSQLRS amplification
10. NetBIOS amplification
11. NTP amplification
12. OpenVPN amplification
13. rpcbind amplification
14. SNMP amplification
15. SSDP amplification
16. STUN amplification
17. TCP ACK
18. TCP RST
19. TCP SYN
20. TCP SYN/ACK amplification

Top 5 Attack Vectors

Ta

TCP ACK

Number of Attacks

13,658

Ts

TCP SYN

Number of Attacks

13,511

Tr

TCP RST

Number of Attacks

13,225

Tk

TCP SYN/ACK

Number of Attacks

11,268

Im

ICMP

Number of Attacks

9,979

Top Ten Vertical Industries Under Attack

The following industry chart shows the most targeted sectors in 1H 2021 by number of attacks.

Rank Vertical Frequency Max Attack Max Impact Average Duration
1
Wired Telecommunications Resellers icon Wired Telecommunications Carriers
3,805 100.29 Gbps 87.72 Mpps 53.6 Minutes
2
radio icon Internet Publishing, Broadcasting + Web Search Portals
695 90.18 Gbps 7.94 Mpps 57.7 Minutes
3
woman at laptop icon Computer Training
174 6.11 Gbps 2.29 Mpps 35.0 Minutes
4
semiconductor icon Semiconductor + Related Device Manufacturing
151 25.99 Gbps 5.95 Mpps 65.7 Minutes
5
Telecomm Tower icon All Other Telecommunications
100 64.82 Gbps 16.11 Mpps 34.4 Minutes
6
cloud icon with up arrow Data Processing, Hosting + Related Services
93 166.93 Gbps 20.86 Mpps 36.8 Minutes
7
Tire icon Tire Dealers
43 5.69 Gbps 1.17 Mpps 18.3 Minutes
8
cell phone icon Wireless Telecommunications Carriers (except Satellite)
37 0.84 Gbps 0.12 Mpps 12.8 Minutes
9
laptop icon Electronic Computer Manufacturing
36 1.34 Gbps 0.17 Mpps 70.2 Minutes
10
Lab Formula Beaker icon All Other Professional, Scientific + Technical Services
2 0.31 Gbps 0.05 Mpps 12.0 Minutes
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