Stage 2 – A DNS amplification attack, where UDP packets are spoofed with the victim’s IP and sent to DNS resolvers.Stage 1 – Flooding the site with HTTP traffic (Layer 7 attack on websites or APIs), which can bypass CAPTCHA verification of protection services.Figure 2 – Another DDoS for hire boasting Cloudflare bypassĬurrently, several open-source tools and websites exist that exploit misconfigured DNS (Domain Name Server) records to identify a website’s true IP behind the protective CDN, such as crt.sh, Crimeflare, and Cloudmare.Īkamai researchers have identified Killnet’s modus operandi as a two-stage attack: These botnets boast the ability to bypass Cloudflare and similar cloud protection services. Typically, these include insecure IoT devices and machines running unpatched software, which phone home to the attacker’s C&C (Command and Control) servers. The hacktivists’ weapon of choice is botnets (also known as stressors or booters), a swarm of devices infected with malware that can carry out phishing, DDoS, and other attacks. The groups document their attacks using services like check-host. Killnet, in particular, adamantly attacked the Medical sector, along with US government entities. These groups are generally active on Telegram and appear to be affiliated, coordinating their attacks for maximum damage, as seen below:įigure 1 – Threat Actors claim responsibility for hospital DDoS attack Other groups that recently participated in the DDoS campaigns include Mysterious Team Bangladesh, Killnet, Killmilk, Passion Botnet, Infinity Hackers, Anonymous Russia, and Mysterious Team Bangladesh. These included Paypal, Twitter, the CIA, Microsoft, and American Express. Additionally, Anonymous Sudan targeted prominent US websites pledging support for Killnet’s previous support for Anonymous Sudan. Since January, the hacktivist group ‘Anonymous Sudan’ has initiated several DDoS campaigns against Sweden, Germany, Denmark, and the Netherlands in response to Quran burnings by far-right extremist groups. Cyble Research and Intelligence Labs (CRIL) has recently covered a similar attack on Bahrain and Israel. Hacktivists used defacement manifestos and disruptive DDoS attacks as mediums for their message. While some hacktivists took a more practical approach, including GhostSec’s ICS attacks, the attacks tended towards defacement and DDoS campaigns. Since the past year, the Ukraine-Russia conflict has played out in cyberspace as well as on the ground. Hacktivist Groups carry out DDoS Attacks against Infrastructure
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