{"id":5846,"date":"2021-11-19T12:05:47","date_gmt":"2021-11-19T10:05:47","guid":{"rendered":"https:\/\/www.retarus.com\/blog\/fr\/comme-dans-un-jour-sans-fin-emotet-fait-son-retour"},"modified":"2024-05-07T19:41:12","modified_gmt":"2024-05-07T17:41:12","slug":"just-like-groundhog-day-emotet-is-back-with-a-new-bag-of-tricks","status":"publish","type":"post","link":"https:\/\/www.retarus.com\/blog\/fr\/just-like-groundhog-day-emotet-is-back-with-a-new-bag-of-tricks\/","title":{"rendered":"Comme dans \u00ab\u00a0Un jour sans fin\u00a0\u00bb : Emotet fait son retour"},"content":{"rendered":" <p>En janvier, la police criminelle f\u00e9d\u00e9rale allemande d\u00e9clarait fi\u00e8rement la fin du suppos\u00e9 \u00ab\u00a0logiciel malveillant le plus dangereux au monde\u00a0\u00bb\u00a0: en coop\u00e9ration avec les autorit\u00e9s judiciaires de sept autres pays, elle avait r\u00e9ussi \u00e0 d\u00e9manteler totalement l&rsquo;infrastructure de serveurs d&rsquo;Emotet, d\u00e9sactivant ainsi ce cheval de Troie ravageur. Ce \u00ab\u00a0coup dur port\u00e9 \u00e0 la cybercriminalit\u00e9 organis\u00e9e internationale\u00a0\u00bb n&rsquo;aura, h\u00e9las, pas dur\u00e9.<\/p>   <h2 class=\"wp-block-heading\" id=\"h-quand-emotet-renait-de-ses-cendres\">Quand Emotet rena\u00eet de ses cendres<\/h2>   <p>Plusieurs experts en cybers\u00e9curit\u00e9 <a href=\"https:\/\/www.lemagit.fr\/actualites\/252509568\/Menaces-informatiques-Emotet-fait-son-retour\" target=\"_blank\" rel=\"noreferrer noopener\">d\u00e9clarent actuellement<\/a> que des ordinateurs infect\u00e9s par le logiciel malveillant TrickBot ont d\u00e9j\u00e0 commenc\u00e9 \u00e0 t\u00e9l\u00e9charger des fichiers&nbsp;DLL par Internet. Ces fichiers ont \u00e9t\u00e9 identifi\u00e9s \u00e0 l&rsquo;unanimit\u00e9 comme \u00e9tant li\u00e9s \u00e0 Emotet. Le doute n&rsquo;est plus permis : les cybercriminels mettent tout en \u0153uvre pour redonner vie au botnet afin qu&rsquo;il retrouve sa force de frappe initiale.<\/p>   <h2 class=\"wp-block-heading\">Des spams bien con\u00e7us contenant des documents Office truqu\u00e9s<\/h2>   <p>Les nouveaux bots d&rsquo;Emotet ont repris du service. Ils envoient d\u00e9j\u00e0 des spams malveillants, comme l&rsquo;ont confirm\u00e9 les chercheurs en s\u00e9curit\u00e9 de Cryptolaemus&nbsp;<a href=\"https:\/\/twitter.com\/Cryptolaemus1\/status\/1460403592658145283\" target=\"_blank\" rel=\"noreferrer noopener\">sur Twitter<\/a>. Des fichiers manipul\u00e9s aux formats .docm ou .xlsm et des fichiers ZIP prot\u00e9g\u00e9s par mot de passe sont envoy\u00e9s aux victimes potentielles. Dans le pass\u00e9, ces e-mails \u00e9taient relativement bien ex\u00e9cut\u00e9s : ils se faisaient passer pour des messages provenant de coll\u00e8gues ou de partenaires commerciaux et contenaient m\u00eame parfois des extraits de conversations pr\u00e9c\u00e9dentes du destinataire.<\/p>   <h2 class=\"wp-block-heading\">L&rsquo;enjeu d&rsquo;une protection de messagerie compl\u00e8te <\/h2>   <p>Comme pour tout autre logiciel malveillant, le constat est identique&nbsp;: \u00e0 moyen terme, il n&rsquo;existe pas de protection efficace \u00e0 100&nbsp;% face \u00e0 Emotet. Une solution de s\u00e9curit\u00e9 de messagerie performante combin\u00e9e \u00e0 une <a href=\"https:\/\/www.retarus.com\/fr\/retarus-anti-phishing-guide\/\" target=\"_blank\" rel=\"noreferrer noopener\">sensibilisation adapt\u00e9e des utilisateurs<\/a> permet cependant, le plus souvent, d&rsquo;\u00e9viter une infection de l&rsquo;infrastructure de l&rsquo;entreprise. Ou du moins de limiter l&rsquo;impact d&rsquo;une attaque si elle devait survenir.<\/p>   <p>Dans le cadre de sa solution compl\u00e8te CxO Fraud Detection, Retarus se base sur la combinaison de divers algorithmes permettant d&rsquo;identifier le \u00ab&nbsp;From-Spoofing&nbsp;\u00bb et le \u00ab&nbsp;Domain-Spoofing&nbsp;\u00bb afin d&#8217;emp\u00eacher <a href=\"https:\/\/en.wikipedia.org\/wiki\/Email_spoofing#Business_email\" target=\"_blank\" rel=\"noreferrer noopener\">la compromission des messageries commerciales<\/a> (Business Email Compromise) . Les e-mails provenant de fausses adresses d&rsquo;exp\u00e9diteur (correspondant par exemple \u00e0 des responsables hi\u00e9rarchiques dans une entreprise, \u00e9galement exploit\u00e9es par Emotet) sont ainsi reconnus et filtr\u00e9s avant de pouvoir \u00eatre livr\u00e9s.<\/p>   <h2 class=\"wp-block-heading\">Emotet, le logiciel cam\u00e9l\u00e9on depuis 2014<\/h2>   <p>Emotet repr\u00e9sente l&rsquo;un des chevaux de Troie les plus \u00ab&nbsp;performants&nbsp;\u00bb de l&rsquo;histoire r\u00e9cente de l&rsquo;informatique et sert entre autres de s\u00e9same pour les ransomwares. Selon les estimations, le logiciel malveillant aurait occasionn\u00e9 au moins 14,5&nbsp;millions d&rsquo;euros de dommages rien qu&rsquo;en Allemagne. Emotet a \u00e9t\u00e9 \u00ab&nbsp;d\u00e9couvert&nbsp;\u00bb pour la premi\u00e8re fois en 2014 et n&rsquo;a cess\u00e9 de se transformer depuis. Afin d&rsquo;assurer une protection optimale prenant en compte ces variantes toujours plus sophistiqu\u00e9es, Retarus mise sur son m\u00e9canisme brevet\u00e9 Postdelivery Protection&nbsp;<a href=\"https:\/\/www.retarus.com\/fr\/services\/email-security\/tech-specs\/#patient-zero-detection\" target=\"_blank\" rel=\"noreferrer noopener\">Patient Zero Detection<\/a>. La solution d\u00e9tecte les programmes malveillants et liens hypertexte dangereux m\u00eame dans les e-mails ayant d\u00e9j\u00e0 \u00e9t\u00e9 livr\u00e9s, d\u00e8s que les patterns correspondants sont disponibles.<\/p>   <p>Par ailleurs, gr\u00e2ce au mod\u00e8le modulaire de sa plateforme compl\u00e8te <a href=\"https:\/\/www.retarus.com\/fr\/secure-email-platform\/\" target=\"_blank\" rel=\"noreferrer noopener\">Secure Email Platform<\/a>, Retarus couvre parfaitement tous les composants du canal de communication. Un plan B reste possible, par exemple lorsque, malgr\u00e9 toutes les pr\u00e9cautions, l&rsquo;infrastructure de messagerie de l&rsquo;entreprise se trouve bloqu\u00e9e. Ainsi, avec <a href=\"https:\/\/www.retarus.com\/fr\/services\/email-continuity\/\" target=\"_blank\" rel=\"noreferrer noopener\">Email Continuity<\/a>, les entreprises et leurs employ\u00e9s conservent \u00e0 tout moment une alternative d&rsquo;acc\u00e8s \u00e0 leur communication d&rsquo;entreprise par e-mail. Pr\u00e9cieux !<\/p> ","protected":false},"excerpt":{"rendered":"<p>Le d\u00e9mant\u00e8lement de l&rsquo;infrastructure d&rsquo;Emotet aura h\u00e9las \u00e9t\u00e9 de courte dur\u00e9e. Les bots reprennent de plus belle l&rsquo;envoi d&rsquo;e-mails \u00ab\u00a0bien con\u00e7us\u00a0\u00bb provenant de suppos\u00e9s coll\u00e8gues.<\/p>\n","protected":false},"author":12,"featured_media":5847,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[8,15],"tags":[102,3618,509],"dipi_cpt_category":[],"class_list":["post-5846","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-security","tag-email-security","tag-emotet","tag-malware"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v24.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Comme dans &quot;Un jour sans fin&quot; : Emotet fait son retour - Retarus Corporate Blog - FR<\/title>\n<meta name=\"description\" content=\"Die Zerschlagung der Emotet-Infrastruktur war leider nicht von Dauer. 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