Same time saw cybercriminals send traffic to targeted sites via NetBIOS name servers, domain controller PRC services connected via a dynamic port, and to WD Sentinel licensing servers.
As per Kaspersky Lab DDOS Intelligence Report for Q4 2015, the longest botnet-based DDoS attack in 2015 Q4 lasted 371 hours (or 15.5 days) – a record for 2015. During the reporting period cybercriminals launched attacks using bots from different families. In Q3, the proportion of such complex attacks was 0.7%, while in the final three months of the year it reached 2.5%. The popularity of Linux bots also continued to grow – from 45.6% to 54.8% of all DDoS attacks registered in Q4 2015.
Same report revealed that resources in 69 countries were targeted by botnet-assisted attacks (compared to 79 in Q3). As in the previous quarter, the vast majority of attacks (94.9%) took place in just 10 countries. There were some minor changes among the leaders in Q4, but China, South Korea and the US remained the worst-affected countries.
Among other trends observed in Q4 were new channels for carrying out reflection DDoS attacks that exploit weaknesses in a third party’s configuration to amplify an attack. In particular, the fourth quarter saw cybercriminals send traffic to targeted sites via NetBIOS name servers, domain controller PRC services connected via a dynamic port, and to WD Sentinel licensing servers. The attackers also continued to use IoT devices – for example, researchers identified about 900 CCTV cameras around the world that formed a botnet used for DDoS attacks.
Kaspersky Lab experts also detected a new type of attack on web resources powered by the WordPress content management system (CMS). This involved JavaScript code being injected into the body of web resources that then addressed the target resource on behalf of the user’s browser. The power of one such DDoS attack amounted to 400 Mbit/sec and lasted 10 hours. The attackers used a compromised web application running WordPress, as well as an encrypted HTTPS connection to impede any traffic filtering that may be used by the owner of the resource.
“We can see that the complexity and the power of DDoS attacks have not diminished with time, even if the number of attacked resources has fallen. Unfortunately, DDoS remains a convenient and affordable tool for online crime because there are still software vulnerabilities that attackers can use to penetrate servers. There are also users who fail to protect their devices, increasing the chances of those devices being infected by bots. For our part, we are committed to providing businesses with information about the DDoS threat and promoting the fight against it, because DDoS is a threat that can and should be combated,” comments Evgeny Vigovsky, Head of Kaspersky DDoS Protection, Kaspersky Lab.
