{"id":55923,"date":"2024-04-25T14:13:43","date_gmt":"2024-04-25T14:13:43","guid":{"rendered":"https:\/\/packetstormsecurity.com\/news\/view\/35815\/Nation-State-Hackers-Exploit-Cisco-Firewall-Zero-Days-To-Backdoor-Government-Networks.html"},"modified":"2024-04-25T14:13:43","modified_gmt":"2024-04-25T14:13:43","slug":"nation-state-hackers-exploit-cisco-firewall-zero-days-to-backdoor-government-networks","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/nation-state-hackers-exploit-cisco-firewall-zero-days-to-backdoor-government-networks\/","title":{"rendered":"Nation-State Hackers Exploit Cisco Firewall Zero Days To Backdoor Government Networks"},"content":{"rendered":"<figure class=\"intro-image intro-left\"> <img decoding=\"async\" src=\"https:\/\/cdn.arstechnica.net\/wp-content\/uploads\/2020\/10\/malware-800x600.jpg\" alt=\"A stylized skull and crossbones made out of ones and zeroes.\"><figcaption class=\"caption\"><\/figcaption><\/figure>\n<aside id=\"social-left\" class=\"social-left\" aria-label=\"Read the comments or share this article\"> <a class=\"comment-count icon-comment-bubble-down\" href=\"https:\/\/arstechnica.com\/security\/2024\/04\/cisco-firewall-0-days-under-attack-for-5-months-by-resourceful-nation-state-hackers\/?comments=1\"> <\/p>\n<h4 class=\"comment-count-before\">reader comments<\/h4>\n<p> <span class=\"comment-count-number\">26<\/span> <\/a> <\/aside>\n<p> <!-- cache hit 382:single\/related:afbb751a94d924950a2f97b7305bc3c4 --><!-- empty --><\/p>\n<p>Hackers backed by a powerful nation-state have been exploiting two zero-day vulnerabilities in Cisco firewalls in a five-month-long campaign that breaks into government networks around the world, researchers reported Wednesday.<\/p>\n<p>The attacks against Cisco\u2019s Adaptive Security Appliances firewalls are the latest in a rash of network compromises that target firewalls, VPNs, and network-perimeter devices, which are designed to provide a moated gate of sorts that keeps remote hackers out. Over the past 18 months, threat actors\u2014mainly backed by the Chinese government\u2014have turned this security paradigm on its head in attacks that exploit previously unknown vulnerabilities in security appliances from the likes of <a href=\"https:\/\/arstechnica.com\/security\/2024\/01\/mass-exploitation-of-ivanti-vpns-is-infecting-networks-around-the-globe\/\">Ivanti<\/a>,<a href=\"https:\/\/arstechnica.com\/security\/2023\/11\/critical-vulnerability-in-atlassian-confluence-server-is-under-mass-exploitation\/\"> Atlassian<\/a>, <a href=\"https:\/\/arstechnica.com\/security\/2023\/10\/critical-citrix-bleed-vulnerability-allowing-mfa-bypass-comes-under-mass-exploitation\/\">Citrix<\/a>, and <a href=\"https:\/\/arstechnica.com\/information-technology\/2023\/06\/mass-exploitation-of-critical-moveit-flaw-is-ransacking-orgs-big-and-small\/\">Progress<\/a>. These devices are ideal targets because they sit at the edge of a network, provide a direct pipeline to its most sensitive resources, and interact with virtually all incoming communications.<\/p>\n<h2>Cisco ASA likely one of several targets<\/h2>\n<p>On Wednesday, it was Cisco\u2019s turn to warn that its ASA products have received such treatment. Since November, a previously unknown actor tracked as UAT4356 by Cisco and STORM-1849 by Microsoft has been exploiting two zero-days in attacks that go on to install two pieces of never-before-seen malware, researchers with Cisco\u2019s Talos security team <a href=\"https:\/\/blog.talosintelligence.com\/arcanedoor-new-espionage-focused-campaign-found-targeting-perimeter-network-devices\/\">said<\/a>. Notable traits in the attacks include:<\/p>\n<ul>\n<li aria-level=\"1\">An advanced exploit chain that targeted multiple vulnerabilities, at least two of which were zero-days<\/li>\n<li aria-level=\"1\">Two mature, full-feature backdoors that have never been seen before, one of which resided solely in memory to prevent detection<\/li>\n<li aria-level=\"1\">Meticulous attention to hiding footprints by wiping any artifacts the backdoors may leave behind. In many cases, the wiping was customized based on characteristics of a specific target.<\/li>\n<\/ul>\n<aside class=\"ad_wrapper\" aria-label=\"In Content advertisement\"> <span class=\"ad_notice\">Advertisement <\/span> <\/aside>\n<p>Those characteristics, combined with a small cast of selected targets all in government, have led Talos to assess that the attacks are the work of government-backed hackers motivated by espionage objectives.<\/p>\n<p>\u201cOur attribution assessment is based on the victimology, the significant level of tradecraft employed in terms of capability development and anti-forensic measures, and the identification and subsequent chaining together of 0-day vulnerabilities,\u201d Talos researchers wrote. \u201cFor these reasons, we assess with high confidence that these actions were performed by a state-sponsored actor.\u201d<\/p>\n<p>The researchers also warned that the hacking campaign is likely targeting other devices besides the ASA. Notably, the researchers said they still don\u2019t know how UAT4356 gained initial access, meaning the ASA vulnerabilities could be exploited only after one or more other currently unknown vulnerabilities\u2014likely in network wares from Microsoft and others\u2014were exploited.<\/p>\n<p>\u201cRegardless of your network equipment provider, now is the time to ensure that the devices are properly patched, logging to a central, secure location, and configured to have strong, multi-factor authentication (MFA),\u201d the researchers wrote. Cisco has released security updates that patch the vulnerabilities and is urging all ASA users to install them promptly.<\/p>\n<p>UAT4356 started work on the campaign no later than last July when it was developing and testing the exploits. By November, the threat group first set up the dedicated server infrastructure for the attacks, which began in earnest in January. The following image details the timeline:<\/p>\n<figure class=\"image shortcode-img center large\"><a href=\"https:\/\/cdn.arstechnica.net\/wp-content\/uploads\/2024\/04\/uta4356-timeline.jpeg\" class=\"enlarge\" data-height=\"1278\" data-width=\"1428\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn.arstechnica.net\/wp-content\/uploads\/2024\/04\/uta4356-timeline-640x573.jpeg\" width=\"640\" height=\"573\" srcset=\"https:\/\/cdn.arstechnica.net\/wp-content\/uploads\/2024\/04\/uta4356-timeline-1280x1146.jpeg 2x\"><\/a><figcaption class=\"caption\"><\/figcaption><\/figure>\n<p>One of the vulnerabilities, tracked as <a href=\"https:\/\/sec.cloudapps.cisco.com\/security\/center\/content\/CiscoSecurityAdvisory\/cisco-sa-asaftd-persist-rce-FLsNXF4h\">CVE-2024-20359<\/a>, resides in a now-retired capability allowing for the preloading of VPN clients and plug-ins in ASA. It stems from improper validation of files when they\u2019re read from the flash memory of a vulnerable device and allows for remote code execution with root system privileges when exploited. UAT4356 is exploiting it to backdoors Cisco tracks under the names Line Dancer and Line Runner. In at least one case, the threat actor is installing the backdoors by exploiting <a href=\"https:\/\/sec.cloudapps.cisco.com\/security\/center\/content\/CiscoSecurityAdvisory\/cisco-sa-asaftd-websrvs-dos-X8gNucD2\">CVE-2024-20353<\/a>, a separate ASA vulnerability with a severity rating of 8.6 out of a possible 10.<\/p>\n<p> READ MORE <a href=\"https:\/\/packetstormsecurity.com\/news\/view\/35815\/Nation-State-Hackers-Exploit-Cisco-Firewall-Zero-Days-To-Backdoor-Government-Networks.html\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":55924,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[277],"tags":[10912],"class_list":["post-55923","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity-blogs","tag-headlinehackergovernmentcyberwarciscobackdoor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nation-State Hackers Exploit Cisco Firewall Zero Days To Backdoor Government Networks 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.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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