{"id":19089,"date":"2026-10-20T14:24:29","date_gmt":"2026-10-20T13:24:29","guid":{"rendered":"https:\/\/cyberschool.univ-rennes.fr\/?p=19089"},"modified":"2026-10-29T14:33:30","modified_gmt":"2026-10-29T13:33:30","slug":"defhack-2026-students-face-a-simulated-cyberattack","status":"publish","type":"post","link":"https:\/\/cyberschool.univ-rennes.fr\/en\/defhack-2026-students-face-a-simulated-cyberattack\/","title":{"rendered":"DefHack 2026: Students Face a Simulated Cyberattack"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Master\u2019s students in Cybersecurity at <a href=\"https:\/\/istic.univ-rennes.fr\/bienvenue-listic\">ISTIC<\/a> (<a href=\"https:\/\/www.univ-rennes.fr\/\">University of Rennes<\/a>) took part in <strong>DefHack, a cyber crisis management exercise<\/strong> designed to challenge them with the technical and human aspects of a cyberattack.<\/p>\n\n\n\n<section class=\"sliderImg\">\n    <div class=\"contain-slider\">\n            <div class=\"sliderImgs\">\n\n                \n                    <div class=\"slide\">\n                        <picture>\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00001-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00001-scaled@2x.webp 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00001-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00001-scaled@2x.webp 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00001-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00001-scaled@2x.jpg 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00001-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00001-scaled@2x.jpg 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <img decoding=\"async\" src=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00001-scaled.jpg\" loading=\"lazy\" alt=\"\u00e9tudiants lors de l'exercice\" \/>\n                        <\/picture>\n                    <\/div>\n\n                \n                    <div class=\"slide\">\n                        <picture>\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00021-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00021-scaled@2x.webp 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00021-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00021-scaled@2x.webp 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00021-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00021-scaled@2x.jpg 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00021-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00021-scaled@2x.jpg 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <img decoding=\"async\" src=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00021-scaled.jpg\" loading=\"lazy\" alt=\"\u00e9tudiants lors de l'exercice\" \/>\n                        <\/picture>\n                    <\/div>\n\n                \n                    <div class=\"slide\">\n                        <picture>\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00007-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00007-scaled@2x.webp 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00007-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00007-scaled@2x.webp 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00007-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00007-scaled@2x.jpg 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00007-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00007-scaled@2x.jpg 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <img decoding=\"async\" src=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00007-scaled.jpg\" loading=\"lazy\" alt=\"\u00e9tudiants lors de l'exercice\" \/>\n                        <\/picture>\n                    <\/div>\n\n                \n                    <div class=\"slide\">\n                        <picture>\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00017-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00017-scaled@2x.webp 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00017-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00017-scaled@2x.webp 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00017-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00017-scaled@2x.jpg 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00017-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00017-scaled@2x.jpg 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <img decoding=\"async\" src=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00017-scaled.jpg\" loading=\"lazy\" alt=\"\u00e9tudiants lors de l'exercice\" \/>\n                        <\/picture>\n                    <\/div>\n\n                \n                    <div class=\"slide\">\n                        <picture>\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00018-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00018-scaled@2x.webp 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/webp\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00018-scaled.webp, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00018-scaled@2x.webp 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00018-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00018-scaled@2x.jpg 2x\"\n                            media=\"(max-width: 480px)\"\n                            >\n                            <source\n                            type=\"image\/jpeg\"\n                            srcset=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00018-scaled.jpg, https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00018-scaled@2x.jpg 2x\"\n                            media=\"(min-width: 1280px)\"\n                            >\n                            <img decoding=\"async\" src=\"https:\/\/cyberschool.univ-rennes.fr\/app\/uploads\/2026\/10\/image00018-scaled.jpg\" loading=\"lazy\" alt=\"Cette immersion leur a permis de se mettre dans la peau de cybercombattants et cybercombattantes et d\u2019appr\u00e9hender concr\u00e8tement les enjeux de la lutte informatique d\u00e9fensive.\" \/>\n                        <\/picture>\n                    <\/div>\n\n                            <\/div>\n\n\n\n\n    <\/div>\n\n    <script>    \n        jQuery('.sliderImgs').slick({\n            infinite: true\n        });\n\n    <\/script>\n\n<\/section>\n\n\n\n<!--more-->\n\n\n\n<h2 class=\"wp-block-heading\">A French Navy frigate at the heart of the scenario<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">How should you respond when a computer system is compromised? This was the scenario presented to students on ISTIC\u2019s<a href=\"https:\/\/cyberschool.univ-rennes.fr\/en\/education\/masters-and-postgraduate-programmes\/masters-cybersecurity-with-ciso-specialisation\/\"> <\/a><a href=\"https:\/\/cyberschool.univ-rennes.fr\/en\/education\/masters-and-postgraduate-programmes\/masters-cybersecurity-with-ciso-specialisation\/\" target=\"_blank\" rel=\"noreferrer noopener\">CISO specialisation<\/a> and <a href=\"https:\/\/cyberschool.univ-rennes.fr\/en\/education\/masters-and-postgraduate-programmes\/masters-cybersecurity-science-of-software-and-hardware-security\/\" target=\"_blank\" rel=\"noreferrer noopener\">Science of Software and Hardware Security specialisation<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Over several hours, they had to investigate a <strong>simulated attack targeting a French Navy frigate<\/strong>. <strong>Detecting the intrusion, analysing threats, auditing systems and defining remedial measures<\/strong>: the teams had to identify vulnerabilities and determine how to restore the affected services.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This scenario formed part of the 2026 edition of DefHack, held from 5 to 16 October at several higher education institutions across France. In total, nearly 600 students from 17 institutions took part in this <strong>initiative led by the<\/strong> <a href=\"https:\/\/www.defense.gouv.fr\/comcyber\/commandement-cyberdefense-comcyber\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>French Cyber Defence Command (COMCYBER)<\/strong><\/a>, with the <strong>participation of the<\/strong> <strong><a href=\"https:\/\/www.dgse.gouv.fr\/fr\" target=\"_blank\" rel=\"noopener\">Direction g\u00e9n\u00e9rale de la s\u00e9curit\u00e9 ext\u00e9rieure (DGSE)<\/a> and <a href=\"https:\/\/www.defense.gouv.fr\/dga\/dga-maitrise-linformation\" target=\"_blank\" rel=\"noopener\">Direction g\u00e9n\u00e9rale de l\u2019armement \u2013 Ma\u00eetrise de l\u2019information (DGA MI)<\/a><\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Coordinating teams under pressure<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When faced with an attack, technical expertise alone is not enough. Participants must also allocate roles, prioritise urgent tasks and share relevant information to ensure a coordinated response. <strong>Events unfold rapidly, priorities shift and decisions must be made within a limited timeframe.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This immersive exercise gave students the opportunity to <strong>step into the shoes of cyber combatants and gain practical insight into the challenges of defensive cyber operations<\/strong>. They were able to appreciate the <strong>importance of coordination, communication and stress management<\/strong> \u2014 all essential factors in responding effectively to an incident.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The day concludes with an <strong>after-action review to analyse the decisions made, the difficulties encountered and potential areas for improvement<\/strong>. The aim is not necessarily to resolve every problem, but to understand the dynamics of a complex crisis and learn how to tackle it collectively.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Exploring careers in cyber defence<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Beyond putting their skills into practice, DefHack 2026 gives students the opportunity to <strong>discover the range of roles involved in the armed forces\u2019 cyber defence operations and the variety of missions they encompass<\/strong>. The exercise also provides an opportunity to <strong>explore entry routes and career prospects within the French Ministry of the Armed Forces, both in military and civilian roles<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For ISTIC students, this immersive experience complements their academic training, helping them understand the operational realities of defensive cyber operations and explore career opportunities in the sector.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Master\u2019s students in Cybersecurity at ISTIC (University of Rennes) took part in DefHack, a cyber crisis management exercise designed to challenge them with the technical and human aspects of a cyberattack.<\/p>\n","protected":false},"author":8,"featured_media":19079,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-19089","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-events"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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