On June 27, 2022, the cybersecurity firm Imperva mitigated a DDoS attack with over 25.3 billion requests. The attack, according to experts, sets a new record for Imperva’s application DDoS mitigation solution. The attack, which targeted an unnamed Chinese telecommunications company, was notable for its duration, lasting more than four hours and peaking at 3.9 million RPS.
“On June 27, 2022, Imperva mitigated a single attack with over 25.3 billion requests, setting a new record for Imperva’s application DDoS mitigation solution” reads the announcement. “While attacks with over one million requests per second (RPS) aren’t new, we’ve previously only seen them last for several seconds to a few minutes. On June 27, Imperva successfully mitigated a strong attack that lasted more than four hours and peaked at 3.9 million RPS.”
The Chinese telecommunications company had previously been targeted by large attacks, and experts added that two days later, a new DDoS attack hit its website, albeit for a shorter period of time. This record-breaking attack had an average rate of 1.8 million RPS. To send multiple requests over individual connections, threat actors used HTTP/2 multiplexing or combining multiple packets into one.
The attackers’ technique is difficult to detect and can bring down targets with a limited number
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