Executive Summary OpenVPN is an application layer VPN implementation based on the OpenSSL library and serves over port 1194. In September 2019, OpenVPN was found to be vulnerable to UDP reflection attacks. This document analyzes threat exposure of the entire network, common attack means, and the bandwidth amplification factor (BAF) of reflection attacks via the […]
At 17:00 of May 20, NSFOCUS SOC detected an abnormal traffic alert in the global monitoring center, the IP addresses of a customer from Hong Kong were under attack and the maximum attack peak reached 634.6 Gbps. This had been the largest of all attacks targeting NSFOCUS’s customers by thetime this report was written. According […]
The first nine months of 2019 saw sharp rise in the market prices of cryptocurrencies dominated by Bitcoin. Despite a fall in the fourth quarter, the prices remained high. Meanwhile, cryptojacking malware became active with the rise of cryptocurrency prices.
From January to May 2020, except in April when the number of DDoS attacks was on a par with that a year earlier, the other months experienced a year-on-year decrease in the number. However, attack traffic in each month in the first half of 2020 increased year on year.
In 2019, ransomware was still a major type of threats that haunted people around the world. As an infamous botnet family, GandCrab generated more than USD 2 billion in ransom payments, simulating the rapid increase of other ransomware.
Threats Against WS-Discovery WSD is a multicast discovery protocol to locate services on a local area network (LAN). However, due to device vendors’ design flaw in the implementation, when a normal IP address sends a service discovery packet, devices will also respond to the request. If exposed on the Internet, these devices will be possibly […]
In this section, we analyzed threats against three major protocols. Threats Against Telnet According to data from NSFOCUS’s threat hunting system, Telnet (available on port 23), targeted by a total of 120,000 attack sources, was the IoT protocol most favored by attackers1 . Figure 7-3 shows the activity trend of Telnet attack sources from March […]
Summary Global distribution of DDoS attacks: U.S. suffered the most DDoS attacks, and Japan received the largest volume of DDoS traffic. DDoS attack trend: March and April witnessed the most frequent DDoS attacks, and May saw the peak of attack traffic. DDoS attacks and COVID-19 pandemic: DDoS attacks fluctuated noticebly with the worldwide outbreak of […]
Overview of DDoS Attacks in 2019 According to the observation of NSFOCUS Security Labs, DDoS botnets in 2019, though with some changes, continued with the same patterns in attack targets, families, and operating platforms overall. Among the track data of NSFOCUS Security Labs in 2019, there were more than 1.1 million instructions given by DDoS […]
