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The Ping is the Thing: Popular HTML5 Feature Used to Trick Chinese Mobile Users into Joining Latest DDoS Attack
DDoS attacks have always been a major threat to network infrastructure and web applications. Attackers are always creating new ways to exploit legitimate services for malicious purposes, forcing us to constantly research DDoS attacks in our CDN to build advanced mitigations. We recently investigated a DDoS attack which was generated mainly from users in Asia. In this case, attackers used a common HTML5 attribute, the <a> tag ping, to trick these users to unwittingly participate in a major DDoS attack that flooded one web site with approximately 70 million requests in four hours. Rather than a vulnerability, the attack relied on turning a legitimate feature into an attack tool. Also, almost all of the users enlisted in the attack were mobile users of the QQBrowser developed by the Chinese tech giant Tencent and used almost exclusively by Chinese speakers. Though it should be noted that this attack could have involved users of any web browser and that recent news could ensure that these attacks continue to grow — and we’ll explain why later in the article.
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