{"id":26784,"date":"2022-04-26T11:30:00","date_gmt":"2022-04-26T09:30:00","guid":{"rendered":"https:\/\/perseus.de\/logiciel-malveillant-zero-jour\/"},"modified":"2026-03-30T11:15:31","modified_gmt":"2026-03-30T09:15:31","slug":"logiciel-malveillant-zero-jour","status":"publish","type":"post","link":"https:\/\/perseus.de\/fr\/logiciel-malveillant-zero-jour\/","title":{"rendered":"Logiciel malveillant z\u00e9ro-jour"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"26784\" class=\"elementor elementor-26784 elementor-22320\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cab3f18 e-flex e-con-boxed e-con e-parent\" data-id=\"cab3f18\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-2a02b8b e-con-full e-flex e-con e-child\" data-id=\"2a02b8b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4f80ded elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"4f80ded\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Zero Day Malware\n<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2d061a7 elementor-widget elementor-widget-image\" data-id=\"2d061a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page-300x300.png\" class=\"attachment-medium size-medium wp-image-25818\" alt=\"\" srcset=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page-300x300.png 300w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page-150x150.png 150w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page-768x768.png 768w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page.png 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6aeb46e0 e-flex e-con-boxed e-con e-parent\" data-id=\"6aeb46e0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-596d872c e-con-full e-flex e-con e-child\" data-id=\"596d872c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e839854 elementor-widget elementor-widget-text-editor\" data-id=\"e839854\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Cela fait r\u00e9f\u00e9rence \u00e0 des programmes malveillants (logiciels malveillants) qui n\u2019ont \u00e9t\u00e9 reconnus comme tels que r\u00e9cemment. Le terme anglais est compos\u00e9 de \u00ab zero day \u00bb et \u00ab malware \u00bb \u2013 c\u2019est-\u00e0-dire un programme malveillant connu depuis z\u00e9ro jours, c\u2019est-\u00e0-dire depuis aujourd\u2019hui. <\/p><h4> <\/h4><h4>Qu&rsquo;est-ce que cela signifie en d\u00e9tail ?<\/h4><ul><li>Un malware zero-day peut repr\u00e9senter n\u2019importe quelle forme de malware.<\/li><li>Comme cela n\u2019\u00e9tait pas connu auparavant, des mesures techniques d\u00e9fensives doivent \u00eatre mises en place dans certains cas. Par exemple : l\u2019entr\u00e9e correspondante pour les bases de donn\u00e9es des antivirus ou la r\u00e8gle correspondante pour le pare-feu. <\/li><li>Dans certains cas, Des mesures pour r\u00e9parer les dommages caus\u00e9s, par exemple rendre \u00e0 nouveau accessibles les donn\u00e9es chiffr\u00e9es par le <a href=\"https:\/\/perseus.de\/2022\/04\/22\/malware\/\">malware<\/a><\/li><li>Les logiciels malveillants zero-day exploitent souvent des vuln\u00e9rabilit\u00e9s de s\u00e9curit\u00e9 jusque-l\u00e0 inconnues. \u00c0 partir du \u00ab jour z\u00e9ro \u00bb, des efforts seront effectu\u00e9s pour les fermer le plus rapidement possible. <\/li><li>En principe, il est difficile pour <a href=\"https:\/\/perseus.de\/2022\/04\/26\/virenscanner\/\">les antivirus<\/a> et <a href=\"https:\/\/perseus.de\/2022\/04\/20\/firewall\/\">les pare-feux<\/a> de d\u00e9tecter les malwares zero-day. Cependant, ils sont de plus en plus programm\u00e9s pour d\u00e9tecter et signaler des sch\u00e9mas inconnus, inhabituels ou suspects. <\/li><\/ul><h4> <\/h4><h4>O\u00f9 est-ce que je rencontre ce th\u00e8me dans mon travail quotidien ?<\/h4><p>En principe, on peut le rencontrer partout. Par exemple, en envoyant un e-mail avec une application suppos\u00e9e dans la pi\u00e8ce jointe, mais qui contient une nouvelle forme de cheval de Troie. <\/p><h4> <\/h4><h4>Que puis-je faire pour am\u00e9liorer ma s\u00e9curit\u00e9 ?<\/h4><ul><li>Renforcez la <a href=\"https:\/\/perseus.de\/2022\/04\/19\/cybersicherheit\/\">cybers\u00e9curit\u00e9<\/a> de votre organisation avec des mesures cibl\u00e9es pour garantir que les malwares zero-day rencontrent le moins de vuln\u00e9rabilit\u00e9s possible. Des r\u00e9seaux s\u00e9par\u00e9s peuvent \u00e9galement contenir une diffusion et <a href=\"https:\/\/perseus.de\/2022\/04\/19\/backup\/\">des sauvegardes<\/a> \u00e0 jour peuvent faciliter le retour rapide au travail apr\u00e8s un incident cybern\u00e9tique. <\/li><\/ul><ul><li>Mettez un grand accent sur <a href=\"https:\/\/perseus.de\/2022\/04\/22\/mitarbeitenden-sensibilisierung\/\">la sensibilisation de vos employ\u00e9s<\/a>. Les malwares zero-day peuvent \u00eatre difficiles \u00e0 d\u00e9tecter pour des d\u00e9fenses techniques telles que les antivirus de d\u00e9tection. Dans de tels cas, des employ\u00e9s prudents peuvent prot\u00e9ger votre entreprise contre des dommages majeurs, par exemple parce qu\u2019une application e-mail leur semble \u00e9trange, ils font bri\u00e8vement des recherches sur l\u2019exp\u00e9diteur suppos\u00e9 et tombent donc sur des avertissements quotidiens concernant de nouveaux malwares.  <\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cb1ddf2 e-flex e-con-boxed e-con e-parent\" data-id=\"cb1ddf2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5aeffe8 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"5aeffe8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Zero Day Malware Cela fait r\u00e9f\u00e9rence \u00e0 des programmes malveillants (logiciels malveillants) qui n\u2019ont \u00e9t\u00e9 reconnus comme tels que r\u00e9cemment. Le terme anglais est compos\u00e9 de \u00ab zero day \u00bb et \u00ab malware \u00bb \u2013 c\u2019est-\u00e0-dire un programme malveillant connu depuis z\u00e9ro jours, c\u2019est-\u00e0-dire depuis aujourd\u2019hui. Qu&rsquo;est-ce que cela signifie en d\u00e9tail ? Un malware [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[58],"tags":[],"class_list":["post-26784","post","type-post","status-publish","format-standard","hentry","category-cyberlexique"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Logiciel malveillant z\u00e9ro-jour - Perseus Technologies<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/perseus.de\/fr\/logiciel-malveillant-zero-jour\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Logiciel malveillant z\u00e9ro-jour - Perseus Technologies\" \/>\n<meta property=\"og:description\" content=\"Zero Day Malware Cela fait r\u00e9f\u00e9rence \u00e0 des programmes malveillants (logiciels malveillants) qui n\u2019ont \u00e9t\u00e9 reconnus comme tels que r\u00e9cemment. Le terme anglais est compos\u00e9 de \u00ab zero day \u00bb et \u00ab malware \u00bb \u2013 c\u2019est-\u00e0-dire un programme malveillant connu depuis z\u00e9ro jours, c\u2019est-\u00e0-dire depuis aujourd\u2019hui. Qu&rsquo;est-ce que cela signifie en d\u00e9tail ? 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Le terme anglais est compos\u00e9 de \u00ab zero day \u00bb et \u00ab malware \u00bb \u2013 c\u2019est-\u00e0-dire un programme malveillant connu depuis z\u00e9ro jours, c\u2019est-\u00e0-dire depuis aujourd\u2019hui. Qu&rsquo;est-ce que cela signifie en d\u00e9tail ? 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