{"id":43389,"date":"2021-10-13T07:00:10","date_gmt":"2021-10-13T07:00:10","guid":{"rendered":"https:\/\/www.threatshub.org\/blog\/microsoft-says-azure-fended-off-what-might-just-be-the-worlds-biggest-ever-ddos-attack\/"},"modified":"2021-10-13T07:00:10","modified_gmt":"2021-10-13T07:00:10","slug":"microsoft-says-azure-fended-off-what-might-just-be-the-worlds-biggest-ever-ddos-attack","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/microsoft-says-azure-fended-off-what-might-just-be-the-worlds-biggest-ever-ddos-attack\/","title":{"rendered":"Microsoft says Azure fended off what might just be the world&#8217;s biggest-ever DDoS attack"},"content":{"rendered":"<p>Microsoft claims its Azure cloud has fended off the largest DDOS attack it&#8217;s detected, which clocked in at 2.4Tbit\/sec.<\/p>\n<p>The software giant has <a target=\"_blank\" href=\"https:\/\/azure.microsoft.com\/en-us\/blog\/business-as-usual-for-azure-customers-despite-24-tbps-ddos-attack\/\" rel=\"noopener\">disclosed<\/a> the attack, which Azure networking senior program manager Amir Dahan wrote was detected in late August.<\/p>\n<p>&#8220;The attack traffic originated from approximately 70,000 sources and from multiple countries in the Asia-Pacific region, such as Malaysia, Vietnam, Taiwan, Japan, and China, as well as from the United States,&#8221; Dahan wrote.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"condor\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2YWedd@AXgVtGGPit6zS63gAAAAM&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2YWedd@AXgVtGGPit6zS63gAAAAM&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>The attackers used UDP reflection, a technique that sees an attacker send packets-a-plenty to an intermediate server \u2013 the &#8220;reflector&#8221;. That name is earned because the attacker&#8217;s packets identify the target machine&#8217;s IP address as the source of the traffic. The intermediate server therefore sends responses to the target machine. Those responses can be larger than the incoming messages from the attacker.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xmd=\",fluid,mpu,leaderboard,\" data-lg=\",fluid,mpu,leaderboard,\" data-xlg=\",fluid,billboard,superleaderboard,mpu,leaderboard,\" data-xxlg=\",fluid,billboard,superleaderboard,brandwidth,brandimpact,leaderboard,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YWedd@AXgVtGGPit6zS63gAAAAM&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YWedd@AXgVtGGPit6zS63gAAAAM&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<div class=\"adun_eagle_desktop_story_wrapper\">\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"mid\" data-raptor=\"eagle\" data-xxlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YWedd@AXgVtGGPit6zS63gAAAAM&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YWedd@AXgVtGGPit6zS63gAAAAM&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<\/p><\/div>\n<p>Dahan wrote that the attacker used &#8220;UDP reflection spanning more than ten minutes with very short-lived bursts, each ramping up in seconds to terabit volumes. In total, we monitored three main peaks, the first at 2.4Tbit\/sec, the second at 0.55Tbit\/sec, and the third at 1.7Tbit\/sec.&#8221;<\/p>\n<p>Azure&#8217;s mighty DDoS-reflection powers saw off the attack, so whoever was behind it didn&#8217;t deny service for the &#8220;Azure customer in Europe&#8221; that Microsoft says was the target of the attack. Sadly, Microsoft hasn&#8217;t named the region targeted, so we&#8217;re none the wiser about which Azure infrastructure has proven its resilience \u2013 should that be something you value.<\/p>\n<p>Microsoft&#8217;s post does, however, claim the attack is the largest it has seen. It may also be the largest anywhere.<\/p>\n<p>In May 2020 AWS claimed it fended off a 2.3Tbit\/sec attack, although Akamai claimed the <a target=\"_blank\" href=\"https:\/\/www.akamai.com\/blog\/news\/largest-ever-recorded-packet-per-secondbased-ddos-attack-mitigated-by-akamai\" rel=\"noopener\">attack it fended off<\/a> in June of the same year involved more packets \u2013 809 million per second of the blighters at the peak of the attack.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YWedd@AXgVtGGPit6zS63gAAAAM&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YWedd@AXgVtGGPit6zS63gAAAAM&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>Cloudflare has staked its own claim to the crown, <a target=\"_blank\" href=\"https:\/\/www.theregister.com\/2021\/08\/23\/security_in_brief\/\" rel=\"noopener\">after recording<\/a> 17.2 million requests per second in an August 2021 attack.<\/p>\n<p>Microsoft hasn&#8217;t shared any insights into the source of the attack, nor the attackers&#8217; motivations other than disrupting service. \u00ae<\/p>\n<p> READ MORE <a href=\"https:\/\/go.theregister.com\/feed\/www.theregister.com\/2021\/10\/13\/azure_deflects_massive_ddos\/\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Much of the 2.4Tbit\/sec came from across Asia and targeted a single Euro-customer Microsoft claims its Azure cloud has fended off the largest DDOS attack it&#8217;s detected, which clocked in at 2.4Tbit\/sec.\u2026  READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[63],"tags":[],"class_list":["post-43389","post","type-post","status-publish","format-standard","hentry","category-the-register"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Microsoft says Azure fended off what might just be the world&#039;s biggest-ever DDoS attack 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" 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