The Great Cannon DDoS tool was deployed again to launch attacks against the LIHKG social media platform used by Hong Kong protesters to coordinate during this year’s anti-extradition protests. Attackers use the Great Cannon to consume the resources of a targeted website outside the Great Firewall of China (GFW) with superfluous web traffic coming from Chinese users who had their insecure HTTP connections injected with malicious JavaScript code when visiting insecure sites.LIHKG said they have reasons to believe that there is a power, or even a national level power behind to organize such attacks as botnet from all over the world.
Source: https://www.bleepingcomputer.com/news/security/the-great-cannon-ddos-tool-used-against-hong-kong-protestors-forum/

