{"id":3203,"date":"2026-01-19T17:15:58","date_gmt":"2026-01-19T16:15:58","guid":{"rendered":"https:\/\/cyberoperations.hu\/?p=3203"},"modified":"2026-01-19T17:15:58","modified_gmt":"2026-01-19T16:15:58","slug":"amikor-a-bitlocker-valik-fegyverre-tanulsagok-a-roman-vizugyi-hatosag-elleni-ransomware-tamadasbol","status":"publish","type":"post","link":"https:\/\/cyberoperations.hu\/en\/amikor-a-bitlocker-valik-fegyverre-tanulsagok-a-roman-vizugyi-hatosag-elleni-ransomware-tamadasbol\/","title":{"rendered":"When BitLocker becomes a weapon \u2013 lessons from the ransomware attack on the Romanian water authority"},"content":{"rendered":"<p data-start=\"150\" data-end=\"597\">This week, a particularly instructive \u2013 and alarming \u2013 cybersecurity incident came to light: <strong data-start=\"249\" data-end=\"310\">Romanian National Water Authority hit by ransomware attack<\/strong>, that is, the <strong data-start=\"320\" data-end=\"361\"><span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">Administra\u021bia Na\u021bional\u0103 Apele Rom\u00e2ne<\/span><\/span><\/strong> organization. The attack was carried out using a BitLocker-based method, and although the OT systems controlling the water infrastructure were ultimately not compromised, the damage to the IT environment poses a serious operational and regulatory risk in itself.<\/p>\n<p data-start=\"599\" data-end=\"1068\">According to the available information, approximately <strong data-start=\"650\" data-end=\"671\">1000 workstations<\/strong> became unusable, and <strong data-start=\"699\" data-end=\"742\">10 out of 11 regional offices were affected<\/strong>. GIS systems, databases, email services and web servers were down while the attackers demanded ransom. This incident clearly demonstrated once again that for an organization operating critical infrastructure, the failure of IT systems alone is enough to jeopardize the performance of basic tasks.<\/p>\n<p data-start=\"1070\" data-end=\"1609\">However, one of the most important lessons of the story is not the fact of the attack itself, but <strong data-start=\"1150\" data-end=\"1176\">the way it happened<\/strong>. The attackers did not work with a classic, easily recognizable ransomware, but used a legitimate system function \u2013 BitLocker drive encryption \u2013 as a weapon. After infiltration, they moved laterally in the network and then activated the encryption locally. Traditional antivirus and EDR solutions are practically helpless in this situation: they do not \u201esee\u201d real malware, since a built-in Windows function is running.<\/p>\n<p data-start=\"1611\" data-end=\"2020\">This is exactly the scenario that the <strong data-start=\"1652\" data-end=\"1707\">reactive, signature-based protection is not prepared<\/strong>. By the time the EDR alerts, the data is already encrypted, business operations have stopped, and the organization is faced with a choice: pay or start a lengthy recovery. In the case of an institution operating critical infrastructure under NIS2, this is not only a technical but also <strong data-start=\"1978\" data-end=\"2016\">regulatory and liability issue<\/strong> also.<\/p>\n<p data-start=\"2022\" data-end=\"2580\">And here comes the real \u201ewhat if\u201d question. A <strong data-start=\"2074\" data-end=\"2120\">truly preventive, AI-based endpoint protection<\/strong> in this case, he would have intervened much earlier. The <strong data-start=\"2178\" data-end=\"2219\"><span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">Deep Instinct<\/span><\/span><\/strong> For example, its deep learning technology does not make decisions based on behavioral patterns or known signatures, but rather analyzes the mathematical characteristics of the code and <strong data-start=\"2361\" data-end=\"2409\">blocks the attack before it is executed<\/strong>. This means that unknown, 0-day ransomware \u2013 including attacks that exploit BitLocker \u2013 simply won\u2019t reach the point of causing any damage.<\/p>\n<p data-start=\"2582\" data-end=\"2973\">Another advantage of the solution is that <strong data-start=\"2614\" data-end=\"2636\">NGAV and EDR in one<\/strong>, with an extremely low false alarm rate that does not overload SOC teams, and is capable of making decisions even in offline environments. If you do all this in a <strong data-start=\"2784\" data-end=\"2825\"><span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">Stellar Cyber<\/span><\/span><\/strong> If we supplement it with a web-based XDR platform, we will get a complete picture of attack attempts not only on the endpoints, but also on the network and server side.<\/p>\n<p data-start=\"2975\" data-end=\"3268\">The case of the Romanian water authority is a perfect example of how <strong data-start=\"3035\" data-end=\"3082\">if BitLocker is already encrypting, it&#039;s too late<\/strong>. In this case, there is no data, no system, no operation \u2013 only crisis management. With a preventive approach, however, there is no data loss, no ransom, and no forced shutdown.<\/p>\n<p data-start=\"3270\" data-end=\"3505\" data-is-last-node=\"\" data-is-only-node=\"\">The question today is no longer whether an organization is under attack. The question is whether <strong data-start=\"3347\" data-end=\"3396\">Will we notice in time \u2013 or will it not happen at all?<\/strong>. For critical infrastructures and NIS2-affected organizations, this is not a technological luxury, but a basic requirement.<\/p>","protected":false},"excerpt":{"rendered":"<p>A h\u00e9ten egy k\u00fcl\u00f6n\u00f6sen tanuls\u00e1gos \u2013 \u00e9s egyben riaszt\u00f3 \u2013 kiberbiztons\u00e1gi incidens l\u00e1tott napvil\u00e1got: ransomware t\u00e1mad\u00e1s \u00e9rte a rom\u00e1n Nemzeti [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":3204,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3203","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-egyeb"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Amikor a BitLocker v\u00e1lik fegyverr\u00e9 \u2013 tanuls\u00e1gok a rom\u00e1n v\u00edz\u00fcgyi hat\u00f3s\u00e1g elleni ransomware t\u00e1mad\u00e1sb\u00f3l - Cyber Operations Group Kft.<\/title>\n<meta name=\"description\" content=\"AI-alap\u00fa kiberv\u00e9delmi megold\u00e1sok kkv-k \u00e9s nagyv\u00e1llalatok sz\u00e1m\u00e1ra. 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