{"id":40942,"date":"2021-05-19T10:00:03","date_gmt":"2021-05-19T10:00:03","guid":{"rendered":"http:\/\/5f196ef6-d40d-475e-a414-4c08f8d59b73"},"modified":"2021-05-19T10:00:03","modified_gmt":"2021-05-19T10:00:03","slug":"cybercriminals-scanned-for-vulnerable-microsoft-exchange-servers-within-five-minutes-of-news-going-public","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/cybercriminals-scanned-for-vulnerable-microsoft-exchange-servers-within-five-minutes-of-news-going-public\/","title":{"rendered":"Cybercriminals scanned for vulnerable Microsoft Exchange servers within five minutes of news going public"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/www.zdnet.com\/a\/hub\/i\/r\/2021\/05\/17\/70abfd45-bf22-413c-84a3-177f2258473a\/thumbnail\/770x578\/49c83d50653af7a5231253373c3360cc\/screenshot-2021-05-17-at-08-51-24.png\" class=\"ff-og-image-inserted\"><\/div>\n<p>Cybercriminals began searching the web for vulnerable Exchange Servers within five minutes of Microsoft&#8217;s security advisory going public, researchers say.&nbsp;<\/p>\n<p>According to a review of threat data from enterprise companies gathered between January and March this year, compiled in Palo Alto Networks&#8217; 2021 <a href=\"https:\/\/www.paloaltonetworks.com\/cortex\/cortex-xpanse\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">Cortex Xpanse<\/a> Attack Surface threat report and published on Wednesday, threat actors were quick-off-the-mark to scan for servers ripe to exploit. &nbsp;<\/p>\n<p>When critical vulnerabilities in widely adopted software are made public, this may trigger a race between attackers and IT admins: one to find suitable targets &#8212; especially when proof-of-concept (PoC) code is available or a bug is trivial to exploit &#8212; and IT staff to perform risk assessments and implement necessary patches.&nbsp; <\/p>\n<p>The report says that in particular, zero-day vulnerabilities can prompt attacker scans within as little as 15 minutes following public disclosure.&nbsp;<\/p>\n<p>Palo Alto researchers say that attackers &#8220;worked faster&#8221; when it came to Microsoft Exchange, however, and scans were detected within no more than five minutes.&nbsp; <\/p>\n<p>On March 2, Microsoft disclosed the existence of <a href=\"https:\/\/www.zdnet.com\/article\/update-immediately-microsoft-rushes-out-patches-for-exchange-server-zero-day-attacks\/\" target=\"_blank\" rel=\"noopener noreferrer\">four zero-day vulnerabilities<\/a> in Exchange Server. The four security issues, collectively impacting on-prem Exchange Server 2013, 2016, and 2019, were exploited by the Chinese advanced persistent threat (APT) group Hafnium &#8212; and <a href=\"https:\/\/www.welivesecurity.com\/2021\/03\/10\/exchange-servers-under-siege-10-apt-groups\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">other APTs<\/a>, including LuckyMouse, Tick, and Winnti Group, quickly followed suit.<\/p>\n<p>The security disclosure triggered a wave of attacks, and three weeks later, they were still ongoing. <a href=\"https:\/\/www.zdnet.com\/article\/microsoft-exchange-server-attacks-theyre-being-hacked-faster-than-we-can-count-says-security-company\/\" target=\"_blank\" rel=\"noopener noreferrer\">At the time<\/a>, F-Secure researchers said vulnerable servers were &#8220;being hacked faster than we can count.&#8221; <\/p>\n<section class=\"sharethrough-top\" data-component=\"medusaContentRecommendation\" data-medusa-content-recommendation-options=\"{&quot;promo&quot;:&quot;promo_zd_recommendation_sharethrough_top_in_article_desktop&quot;,&quot;spot&quot;:&quot;dfp-in-article&quot;}\"> <\/section>\n<p><strong>Read on: <\/strong><a href=\"https:\/\/www.zdnet.com\/article\/everything-you-need-to-know-about-microsoft-exchange-server-hack\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Everything you need to know about the Microsoft Exchange Server hack<\/strong><\/a><\/p>\n<p>It is possible that the general availability of cheap cloud services has helped not only APTs but also smaller cybercriminals groups and individuals to take advantage of new vulnerabilities as they surface.<\/p>\n<p>&#8220;Computing has become so inexpensive that a would-be attacker need only spend about $10 to rent cloud computing power to do an imprecise scan of the entire internet for vulnerable systems,&#8221; the report says. &#8220;We know from the surge in successful attacks that adversaries are regularly winning races to patch new vulnerabilities.&#8221; <\/p>\n<p>The research also highlights Remote Desktop Protocol (RDP) as the most common cause of security weakness among enterprise networks, accounting for 32% of overall security issues, an especially problematic area as many companies made a rapid shift to cloud over the past year in order to allow their employees to work remotely.&nbsp; <\/p>\n<p>&#8220;This is troubling because RDP can provide direct admin access to servers, making it one of the most common gateways for ransomware attacks,&#8221; the report notes. &#8220;They represent low-hanging fruit for attackers, but there is reason for optimism: most of the vulnerabilities we discovered can be easily patched.&#8221; <\/p>\n<h3> Previous and related coverage <\/h3>\n<hr>\n<p><strong>Have a tip?<\/strong> Get in touch securely via WhatsApp | Signal at +447713 025 499, or over at Keybase: charlie0<\/p>\n<hr>\n<p> READ MORE <a href=\"https:\/\/www.zdnet.com\/article\/cybercriminals-scanned-for-vulnerable-microsoft-exchange-servers-within-five-minutes-of-news-going-public\/#ftag=RSSbaffb68\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Research suggests the cheap hire of cloud services has allowed cyberattackers to quickly pick out targets.<br \/>\nREAD MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":40943,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[62],"tags":[],"class_list":["post-40942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zdnet-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cybercriminals scanned for vulnerable Microsoft Exchange servers within five minutes of news going public 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