{"id":19244,"date":"2025-09-13T15:00:57","date_gmt":"2025-09-13T15:00:57","guid":{"rendered":"https:\/\/99bitcoins.com\/fr\/?p=19244"},"modified":"2025-09-13T12:12:47","modified_gmt":"2025-09-13T12:12:47","slug":"blockstream-alerte-phishing","status":"publish","type":"post","link":"https:\/\/99bitcoins.com\/fr\/actu\/blockstream-alerte-phishing\/","title":{"rendered":"Phishing ciblant la crypto : Blockstream tire la sonnette"},"content":{"rendered":"<p>Un courriel \u00ab\u00a0trop beau pour \u00eatre vrai\u00a0\u00bb circule aupr\u00e8s des utilisateurs de Jade. D\u00e9guis\u00e9 en mise \u00e0 jour de firmware, il redirige vers un site pi\u00e9g\u00e9 qui vole cl\u00e9s et fonds. En effet, Blockstream appelle \u00e0 la vigilance et rappelle une r\u00e8gle simple : les fichiers de firmware ne sont jamais envoy\u00e9s par e-mail. Par ailleurs, l&rsquo;alerte tombe dans un climat o\u00f9 les arnaques par hame\u00e7onnage se multiplient, et o\u00f9 quelques bons r\u00e9flexes suffisent souvent \u00e0 \u00e9viter le <strong>pire<\/strong>.<\/p>\n<h2>Ce qui se passe vraiment<\/h2>\n<p>Des acteurs malveillants envoient un message imitant la communication officielle, promettant \u00ab\u00a0la derni\u00e8re version\u00a0\u00bb du firmware Jade. Ainsi, le lien pousse vers un t\u00e9l\u00e9chargement frauduleux capable d&rsquo;exfiltrer des informations sensibles. Cependant, <a class=\"general-link\" href=\"https:\/\/blockstream.com\/jade\/\" target=\"_blank\" rel=\"noopener nofollow\">Blockstream<\/a> insiste : les mises \u00e0 jour doivent passer par les canaux officiels, jamais par e-mail ou pi\u00e8ces <strong>jointes<\/strong>.<\/p>\n<p>N\u00e9anmoins, l&rsquo;entreprise pr\u00e9cise aussi qu&rsquo;aucune donn\u00e9e n&rsquo;a \u00e9t\u00e9 <strong>compromise<\/strong> c\u00f4t\u00e9 serveurs, ce qui n&#8217;emp\u00eache pas un risque individuel si l&rsquo;utilisateur clique et installe le fichier pi\u00e9g\u00e9.<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">\ud83d\udea8 Phishing Alert \ud83d\udea8 <\/p>\n<p>We\u2019ve been made aware of fake emails claiming a \u201cJade firmware update.\u201d  <\/p>\n<p>1\u20e3 This was not sent from Blockstream. <br \/>2\u20e3 Blockstream will never email you firmware files.<br \/>3\u20e3 No data has been compromised.<\/p>\n<p>Don\u2019t Trust. Verify.  <\/p>\n<p>Please follow <a href=\"https:\/\/twitter.com\/Blockstream?ref_src=twsrc%5Etfw\" rel=\"nofollow\" target=\"_blank\">@Blockstream<\/a> and\u2026 <a href=\"https:\/\/t.co\/59ymAZ6NDB\" rel=\"nofollow\" target=\"_blank\">pic.twitter.com\/59ymAZ6NDB<\/a><\/p>\n<p>&mdash; Blockstream (@Blockstream) <a href=\"https:\/\/twitter.com\/Blockstream\/status\/1966586521827368990?ref_src=twsrc%5Etfw\" rel=\"nofollow\" target=\"_blank\">September 12, 2025<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<h2>Le leurre : pourquoi \u00e7a marche<\/h2>\n<p>Le pi\u00e8ge joue sur la peur et l&rsquo;urgence : \u00ab\u00a0mettez \u00e0 jour maintenant\u00a0\u00bb pour \u00ab\u00a0corriger une faille\u00a0\u00bb ou \u00ab\u00a0\u00e9viter une perte\u00a0\u00bb. Concr\u00e8tement, le courriel reprend logo, ton et mise en page attendus, suffisamment pour tromper un regard press\u00e9. En r\u00e9alit\u00e9, sur le plan technique, les attaquants exploitent des domaines proches du vrai (remplacement de lettres par des chiffres, ajout d&rsquo;un point ou d&rsquo;un tiret), puis guident vers un ex\u00e9cutable ou une extension <strong>malicieuse<\/strong>.<\/p>\n<p>Une fois la machine compromise, il suffit d&rsquo;un copier-coller <strong>malencontreux<\/strong> de seed, d&rsquo;une sauvegarde non chiffr\u00e9e ou d&rsquo;une signature h\u00e2tive pour qu&rsquo;un portefeuille soit siphonn\u00e9. De plus, ce n&rsquo;est pas la faille d&rsquo;un fabricant : c&rsquo;est l&rsquo;utilisateur qu&rsquo;on vise, en abusant des habitudes.<\/p>\n<p>Pour mieux comprendre l&rsquo;ampleur de ces attaques, notre <strong>analyse<\/strong> sur les 12 M$ vol\u00e9s en ao\u00fbt par phishing crypto montre que ces techniques s&rsquo;intensifient et touchent tous les utilisateurs.<\/p>\n<h2>L&rsquo;ampleur du ph\u00e9nom\u00e8ne<\/h2>\n<p>Les pertes par phishing repartent \u00e0 la hausse cet \u00e9t\u00e9, avec une explosion du nombre de victimes et des tickets moyens parfois \u00e9lev\u00e9s. \u00c0 cet \u00e9gard, les vagues les plus efficaces recyclent toujours les m\u00eames recettes : fausses alertes de <strong>s\u00e9curit\u00e9<\/strong>, demandes de \u00ab\u00a0v\u00e9rification KYC\u00a0\u00bb urgentes, promesses de mises \u00e0 jour critiques, formulaires d&rsquo;assistance imitant les sites d&rsquo;origine.<\/p>\n<p>Finalement, les succ\u00e8s des attaquants tiennent \u00e0 deux choses : la qualit\u00e9 des leurres (qui s&rsquo;am\u00e9liore) et la dispersion des usages (multichaines, multiservices) qui rendent le tri plus <strong>difficile<\/strong>.<\/p>\n<p>Un simple clic mal plac\u00e9 <strong>suffit<\/strong> \u00e0 ouvrir la porte.<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">\ud83d\udea8 ScamSniffer August 2025 Phishing Report<\/p>\n<p>August losses: $12.17M | 15,230 victims<br \/>VS July: +72% in losses | +67% in victims<\/p>\n<p>Key insight: Sharp escalation driven by EIP-7702 batch-signature scams and direct transfers to phishing contracts. 3 whale hits totaled $5.62M (46%).\u2026 <a href=\"https:\/\/t.co\/l3NJRryuxw\" rel=\"nofollow\" target=\"_blank\">pic.twitter.com\/l3NJRryuxw<\/a><\/p>\n<p>&mdash; Scam Sniffer | Web3 Anti-Scam (@realScamSniffer) <a href=\"https:\/\/twitter.com\/realScamSniffer\/status\/1964235400593178793?ref_src=twsrc%5Etfw\" rel=\"nofollow\" target=\"_blank\">September 6, 2025<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<h2>Mode d&#8217;emploi pour rester en s\u00e9curit\u00e9<\/h2>\n<p>Premier r\u00e9flexe : ne <strong>jamais<\/strong> installer une \u00ab\u00a0mise \u00e0 jour\u00a0\u00bb \u00e0 partir d&rsquo;un e-mail. Ensuite, passer par l&rsquo;application officielle, le site du fabricant ou le d\u00e9p\u00f4t GitHub ; v\u00e9rifier l&rsquo;URL caract\u00e8re par caract\u00e8re. Deuxi\u00e8me r\u00e9flexe : couper court aux formulaires et \u00ab\u00a0supports\u00a0\u00bb apparus via un lien re\u00e7u ; si besoin, taper manuellement l&rsquo;adresse du site l\u00e9gitime, ou utiliser un favori d\u00e9j\u00e0 <strong>enregistr\u00e9<\/strong>.<\/p>\n<p>Troisi\u00e8me r\u00e9flexe : isoler les <strong>secrets<\/strong>. Dans cette logique, la seed ne s&rsquo;entre jamais dans un navigateur, un fichier texte ou un chat ; on la garde hors ligne, et jamais pour \u00ab\u00a0d\u00e9bloquer\u00a0\u00bb un compte. Quatri\u00e8me r\u00e9flexe : segmenter ses avoirs.<\/p>\n<p>Un portefeuille mat\u00e9riel principal pour l&rsquo;\u00e9pargne, un portefeuille \u00ab\u00a0chaud\u00a0\u00bb pour l&rsquo;usage quotidien, des plafonds stricts et une surveillance d&rsquo;adresses. Enfin, signaler les tentatives : remonter les e-mails au fabricant, bloquer l&rsquo;exp\u00e9diteur, partager l&rsquo;alerte pour pr\u00e9venir d&rsquo;autres utilisateurs. Ces gestes \u00e9l\u00e9mentaires, r\u00e9p\u00e9t\u00e9s, transforment un terrain min\u00e9 en routine <strong>g\u00e9rable<\/strong>.<\/p>\n<p>L&rsquo;attaque du moment n&rsquo;a rien de magique : c&rsquo;est une imitation soign\u00e9e d&rsquo;un message de mise \u00e0 jour, pouss\u00e9e au pire moment, quand l&rsquo;utilisateur est press\u00e9. La r\u00e9ponse tient en trois mots : canal officiel, v\u00e9rification, discipline. Si la communaut\u00e9 applique ces garde-fous, la vague s&rsquo;\u00e9teint faute de victimes. \u00c0 d\u00e9faut, les attaquants continueront d&rsquo;exploiter le talon d&rsquo;Achille le plus universel : l&rsquo;humain press\u00e9 qui clique sans <strong>v\u00e9rifier<\/strong>.<\/p>\n<hr>\n<p><strong>Sur le m\u00eame sujet :<\/strong><\/p>\n<ul>\n<li>12 M$ vol\u00e9s en ao\u00fbt, le phishing crypto frappe plus fort que jamais<\/li>\n<li><a class=\"general-link\" href=\"https:\/\/99bitcoins.com\/fr\/crypto-monnaie\/wallets\/hardware-wallet\/\" rel=\"\"> Hardware Wallet : Notre s\u00e9lection des 12 meilleurs cold wallets en Septembre 2025 <\/a><\/li>\n<li><a class=\"general-link\" href=\"https:\/\/99bitcoins.com\/fr\/crypto-monnaie\/wallets\/wallet-crypto-sans-kyc\/\" rel=\"\"> Wallet Crypto Sans KYC : Top 10 en 2025 <\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Un courriel \u00ab\u00a0trop beau pour \u00eatre vrai\u00a0\u00bb circule aupr\u00e8s des utilisateurs de Jade. D\u00e9guis\u00e9 en mise \u00e0 jour de firmware, il redirige vers un site pi\u00e9g\u00e9 qui vole cl\u00e9s et fonds. En effet, Blockstream appelle \u00e0 la vigilance et rappelle une r\u00e8gle simple : les fichiers de firmware ne sont jamais envoy\u00e9s par e-mail. Par..<\/p>\n","protected":false},"author":135978,"featured_media":19240,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[10,6],"tags":[11],"coin":[15],"class_list":["post-19244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-altcoins","category-actu","tag-altcoin"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Phishing ciblant la crypto : Blockstream tire la sonnette<\/title>\n<meta name=\"description\" content=\"Blockstream alerte sur une nouvelle campagne de phishing par email qui cible la communaut\u00e9 crypto. 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