{"id":30994,"date":"2025-07-02T17:26:00","date_gmt":"2025-07-02T17:26:00","guid":{"rendered":"https:\/\/www.eudonet.com\/reagir-face-au-mail-chantage-bitcoin\/"},"modified":"2025-11-05T13:16:23","modified_gmt":"2025-11-05T13:16:23","slug":"reagir-face-au-mail-chantage-bitcoin","status":"publish","type":"post","link":"https:\/\/www.eudonet.com\/fr\/ressources\/blog\/reagir-face-au-mail-chantage-bitcoin\/","title":{"rendered":"R\u00e9agir face aux mails de chantage"},"content":{"rendered":"\n<div class=\"wp-block-lord-blocks-highlight wp-block--highlight\">\n<p><strong>En r\u00e9sum\u00e9 : <\/strong><\/p>\n\n\n\n<p>La cybers\u00e9curit\u00e9 est l\u2019affaire de tous. Malgr\u00e9 le chiffrement irr\u00e9versible mis en place par NetAnswer pour prot\u00e9ger vos mots de passe, de fausses campagnes d\u2019e-mails de ran\u00e7on continuent de circuler, semant la panique chez de nombreux internautes.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ces messages frauduleux pr\u00e9tendent d\u00e9tenir vos donn\u00e9es personnelles et affichent parfois un ancien mot de passe vol\u00e9 lors de piratages historiques.<\/li>\n\n\n\n<li>Leur succ\u00e8s repose sur la peur, la vraisemblance des informations affich\u00e9es et la r\u00e9utilisation trop fr\u00e9quente des m\u00eames mots de passe.<\/li>\n\n\n\n<li>Pour v\u00e9rifier si vos identifiants ont fuit\u00e9, consultez <a href=\"https:\/\/haveibeenpwned.com\/\">haveibeenpwned.com<\/a>, changez imm\u00e9diatement vos mots de passe compromis et utilisez des gestionnaires d\u00e9di\u00e9s.<\/li>\n\n\n\n<li>Un scan r\u00e9gulier avec Malwarebytes et le suivi du MOOC SecNumAcad\u00e9mie de l\u2019ANSSI renforcent votre hygi\u00e8ne num\u00e9rique.<\/li>\n<\/ul>\n\n\n\n<p>En bref : restez vigilants, adoptez de bons r\u00e9flexes de cybers\u00e9curit\u00e9 et rappelez-vous qu\u2019un mot de passe unique, complexe et r\u00e9guli\u00e8rement chang\u00e9 reste votre premi\u00e8re ligne de d\u00e9fense.<\/p>\n<\/div>\n\n\n\n<p><strong>NetAnswer veille chaque jour \u00e0 la s\u00e9curit\u00e9 de vos donn\u00e9es.<\/strong> En particulier, nous avons mis en place un chiffrement des mots de passe irr\u00e9versible qui rend impossible leurs consultations, m\u00eame pour NetAnswer. Pourtant, certains de nos clients, et surement certains de leurs membres, re\u00e7oivent des e-mails de ran\u00e7on o\u00f9 leur mot de passe est \u00e9crit en clair. En voici la cause.<\/p>\n\n\n\n<p>Depuis plus d\u2019un an, une large campagne d\u2019arnaque par e-mail a vu le jour. Celle-ci consiste en un chantage en \u00e9change d\u2019un paiement via Bitcoin pour s\u2019assurer du silence du hacker.<\/p>\n\n\n\n<p>Voici \u00e0 quoi l\u2019e-mail peut ressembler :<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.netanswer.fr\/wp-content\/uploads\/2018\/11\/mailChantage.png\" alt=\"\" class=\"wp-image-15177\" title=\"mailChantage\"\/><\/figure>\n\n\n\n<p><strong>R\u00e9sum\u00e9 pour les anglophobes :<\/strong> Le hacker pr\u00e9tend qu\u2019il y a eu une faille de s\u00e9curit\u00e9 dans votre routeur, qu\u2019un virus (trojan) a infect\u00e9 votre ordinateur afin de r\u00e9cup\u00e9rer votre mot de passe et vos contacts, que des captures d\u2019\u00e9cran de sites non divulgables \u00e0 votre entourage ont \u00e9t\u00e9 prises ou encore que votre webcam a \u00e9t\u00e9 contr\u00f4l\u00e9e et des images de vous enregistr\u00e9es lors de moments intimes.<\/p>\n\n\n\n<p>Il y a 3 raisons pour lesquelles cette escroquerie a rencontr\u00e9 un tel succ\u00e8s :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>l\u2019\u00e9metteur de l\u2019e-mail utilise g\u00e9n\u00e9ralement l\u2019adresse de la victime ou une adresse professionnelle proche de la victime, car sa technicit\u00e9 lui permet de passer les filtres anti-spam,<\/li>\n\n\n\n<li>les all\u00e9gations port\u00e9es \u00e0 l\u2019encontre de la victime ont de grandes chances de trouver une oreille attentive, les sites pornographiques \u00e9tant parmi les plus visit\u00e9s au monde,<\/li>\n\n\n\n<li>l\u2019\u00e9metteur de cet e-mail pr\u00e9tend avoir pirat\u00e9 le compte du receveur en fournissant comme preuve son mot de passe.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-lord-blocks-highlight-content wp-block--highlight-content\">\n<p><strong>Si ce dernier point a convaincu nombre de victimes, rassurez-vous, il y a peu de chance que votre ordinateur ait \u00e9t\u00e9 infect\u00e9 et contr\u00f4l\u00e9.<\/strong> En effet, le fait que le hacker puisse afficher votre mot de passe r\u00e9v\u00e8le \u201csimplement\u201d et malheureusement une fuite de vos donn\u00e9es sur un autre site. En effet en 2012, Linkedin, DropBox, Facebook ont tous \u00e9t\u00e9 pirat\u00e9s, et il existe donc des bases de donn\u00e9es historiques d\u2019anciens mots de passe qui ressemblent s\u00fbrement \u00e0 des mots de passes utilis\u00e9s r\u00e9cemment\u2026 <strong>car tr\u00e8s souvent les mots de passes ne sont pas chang\u00e9s,<\/strong> ou s\u2019ils le sont, ils varient tr\u00e8s peu (ajout ou changement d\u2019un ou plusieurs caract\u00e8res, changement de la date\u2026).<\/p>\n<\/div>\n\n\n\n<p><strong>Premi\u00e8re chose \u00e0 faire<\/strong>, renseigner vos adresses e-mails utilisant le m\u00eame mot de passe sur ce site : <a href=\"https:\/\/haveibeenpwned.com\/\">https:\/\/haveibeenpwned.com\/<\/a> qui r\u00e9pertorie toutes les adresses ayant fuit\u00e9 sur des sites de plus ou moins grandes envergures, comme LinkedIn par exemple. Si vous utilisez le m\u00eame mot de passe que les adresses qui ont fuit\u00e9es, il n\u2019est donc pas \u00e9tonnant de le voir afficher dans l\u2019e-mail que vous avez re\u00e7u.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.netanswer.fr\/wp-content\/uploads\/2018\/11\/haveibeenpwned-e1541173482546.png\" alt=\"\" class=\"wp-image-15179\" title=\"haveibeenpwned\"\/><\/figure>\n\n\n\n<p><strong>Ensuite, assurez-vous <\/strong>que tous les comptes o\u00f9 vous utilisez le m\u00eame mot de passe n\u2019ont pas \u00e9t\u00e9 alt\u00e9r\u00e9s et changez imm\u00e9diatement de mot de passe (on \u00e9vitera soigneusement les dates de naissance ou autre \u201c1234\u201d). Nous ne pouvons que vous conseiller d\u2019avoir des mots de passe diff\u00e9rents par site.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Pour g\u00e9rer vos mots de passe, vous pouvez regarder du c\u00f4t\u00e9 de <a href=\"https:\/\/www.lastpass.com\/fr\">LastPass<\/a>, <a href=\"https:\/\/www.dashlane.com\/fr\">Dashlane<\/a> ou encore <a href=\"https:\/\/1password.com\/fr\/\">1Password<\/a>.<\/p>\n\n\n\n<p>Enfin, m\u00eame si votre ordinateur n\u2019a pas \u00e9t\u00e9 infect\u00e9, vous pouvez passer votre ordinateur au peigne fin (gratuitement) gr\u00e2ce \u00e0 Malwarebytes <a href=\"https:\/\/fr.malwarebytes.com\/\">disponible<\/a> en t\u00e9l\u00e9chargement ici. M\u00eame si ces e-mails ne portent pas de risque en soi, ils nous rappellent la n\u00e9cessit\u00e9 de ne pas prendre \u00e0 la l\u00e9g\u00e8re la gestion de nos donn\u00e9es. Pour en savoir plus, nous vous invitons \u00e0 suivre gratuitement le MOOC de l\u2019ANSSI : <a href=\"https:\/\/secnumacademie.gouv.fr\/\">https:\/\/secnumacademie.gouv.fr\/<\/a> qui vous formera aux bases de la cybers\u00e9curit\u00e9 ou vous permettra d\u2019approfondir vos connaissances.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.netanswer.fr\/wp-content\/uploads\/2018\/11\/moocANSSI.png\" alt=\"\" class=\"wp-image-15181\" title=\"moocANSSI\"\/><\/figure>\n\n\n\n<p>En attendant, vous pouvez respecter des r\u00e8gles simples, \u00e0 savoir <strong>ne pas utiliser le m\u00eame mot de passe pour des sites diff\u00e9rents,<\/strong> <strong>veiller \u00e0 la complexit\u00e9 de ces mots de passe, ne pas installer des copies pirates de jeux ou logiciels pouvant comporter un trojan et proc\u00e9der r\u00e9guli\u00e8rement \u00e0 l\u2019analyse de votre syst\u00e8me.<\/strong><\/p>\n\n\n\n<p>Petite note humoristique pour finir, issue du webcomic CommitStrip, qui illustre le mot de passe le plus utilis\u00e9 de 2013 \u00e0 2017 \u00e0 savoir \u00ab&nbsp;123456&nbsp;\u00bb.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.netanswer.fr\/wp-content\/uploads\/2018\/11\/comicMotDePasse.png\" alt=\"\" class=\"wp-image-15207\" title=\"comicMotDePasse\"\/><\/figure>\n\n\n\n<p>Liens utiles :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.arnaque-chantage-webcam.com\/blog\/fausse-arnaque-webcam-bitcoin-rdp\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.arnaque-chantage-webcam.com\/blog\/fausse-arnaque-webcam-bitcoin-rdp\/<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/withoutbullshit.com\/blog\/a-second-bitcoin-blackmail-scam-based-on-hacked-passwords\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/withoutbullshit.com\/blog\/a-second-bitcoin-blackmail-scam-based-on-hacked-passwords<\/a><\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>NetAnswer veille chaque jour \u00e0 la s\u00e9curit\u00e9 de vos donn\u00e9es. En particulier, nous avons mis en place un chiffrement des mots de passe irr\u00e9versible qui rend impossible leurs consultations, m\u00eame pour NetAnswer. Pourtant, certains de nos clients, et surement certains de leurs membres, re\u00e7oivent des e-mails de ran\u00e7on o\u00f9 leur mot de passe est \u00e9crit [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":27865,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"R\u00e9agir face aux mails de chantage | Eudonet","_yoast_wpseo_metadesc":"Restez vigilants, adoptez de bons r\u00e9flexes de cybers\u00e9curit\u00e9 et utilisez un mot de passe unique, complexe et r\u00e9guli\u00e8rement chang\u00e9.","footnotes":""},"tags":[],"sectors":[61],"solutions":[63],"class_list":["post-30994","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":{"article_suptitle":"","article_short_desc":"","article_caption":"","article_related":"","author_name":"Karima Bouchehait","author_link":"https:\/\/www.linkedin.com\/in\/karima-bouchehait-b2b-sales\/","author_photo":31300,"author_bio":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.3 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>R\u00e9agir face aux mails de chantage | Eudonet<\/title>\n<meta name=\"description\" content=\"Restez vigilants, adoptez de bons r\u00e9flexes de cybers\u00e9curit\u00e9 et utilisez un mot de passe unique, complexe et r\u00e9guli\u00e8rement chang\u00e9.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.eudonet.com\/fr\/ressources\/blog\/reagir-face-au-mail-chantage-bitcoin\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R\u00e9agir face aux mails de chantage\" \/>\n<meta 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