{"id":37376,"date":"2026-08-04T17:51:32","date_gmt":"2026-08-04T17:51:32","guid":{"rendered":"https:\/\/99bitcoins.com\/fr\/?p=37376"},"modified":"2026-08-03T13:33:40","modified_gmt":"2026-08-03T13:33:40","slug":"crypto-hack-86-millions-derobes-sur-les-portefeuilles-coldcard","status":"publish","type":"post","link":"https:\/\/99bitcoins.com\/fr\/actu\/crypto-hack-86-millions-derobes-sur-les-portefeuilles-coldcard\/","title":{"rendered":"Crypto Hack : 86 millions $ d\u00e9rob\u00e9s sur les portefeuilles Coldcard"},"content":{"rendered":"\r\n<p class=\"wp-block-paragraph\">Un crypto hack ciblant une faille de micrologiciel (firmware) dans le hardware wallet Bitcoin <strong>Coldcard<\/strong> a permis de d\u00e9rober au moins <strong>1 367 BTC<\/strong>, soit environ <strong>86 millions de dollars<\/strong> aux cours actuels. L&rsquo;attaque a touch\u00e9 plus de 4 500 adresses en stockage \u00e0 froid \u00e0 travers trois vagues successives. Fait alarmant, l&rsquo;exploit n&rsquo;a jamais n\u00e9cessit\u00e9 d&rsquo;acc\u00e8s physique aux appareils ; les cl\u00e9s priv\u00e9es ont \u00e9t\u00e9 reconstruites de toutes pi\u00e8ces gr\u00e2ce aux math\u00e9matiques.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">Galaxy Research: Three Suspected Attacks on Coldcard-Generated Addresses Drain 1,367 BTC<br><br>Galaxy Research said its Bitcoin on-chain analysis identified three suspected attack waves targeting addresses generated by Coldcard, involving 4,585 addresses and a total of 1,367.05 BTC\u2026 <a href=\"https:\/\/t.co\/JdSz4W1TIk\" rel=\"nofollow\" target=\"_blank\">pic.twitter.com\/JdSz4W1TIk<\/a><\/p>&mdash; Wu Blockchain (@WuBlockchain) <a href=\"https:\/\/x.com\/WuBlockchain\/status\/2083675945169519089?ref_src=twsrc%5Etfw\" rel=\"nofollow\" target=\"_blank\">August 1, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.x.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Le probl\u00e8me central r\u00e9side dans une promesse fondamentale de l&rsquo;auto-conservation (self-custody) : une cl\u00e9 stock\u00e9e hors ligne est cens\u00e9e \u00eatre inaccessible. Cette attaque prouve qu&rsquo;une cl\u00e9 inaccessible peut tout de m\u00eame \u00eatre devin\u00e9e, ou non.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Cette affaire \u00e9clate alors que le cours du <strong>BTC USD<\/strong> \u00e9volue autour de 62 250 $, en baisse de -1,4 % ce lundi matin. Le march\u00e9 est agit\u00e9 par des rumeurs selon lesquelles <strong>Michael Saylor<\/strong> s&rsquo;appr\u00eaterait \u00e0 vendre davantage de Bitcoins, tandis que l&rsquo;\u00e9ch\u00e9ance de la loi CLARITY approche sans qu&rsquo;une issue favorable ne semble se dessiner.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\"><a href=\"https:\/\/x.com\/search?q=%24BTC&amp;src=ctag&amp;ref_src=twsrc%5Etfw\" rel=\"nofollow\" target=\"_blank\">$BTC<\/a> is back into the $62,000-$62,500 level.<br><br>Hold this level, and Bitcoin could rally towards $65,000.<br><br>Lose this level, and BTC could drop to $60,000. <a href=\"https:\/\/t.co\/O877SmIdMU\" rel=\"nofollow\" target=\"_blank\">pic.twitter.com\/O877SmIdMU<\/a><\/p>&mdash; Ted (@TedPillows) <a href=\"https:\/\/x.com\/TedPillows\/status\/2084195951896371605?ref_src=twsrc%5Etfw\" rel=\"nofollow\" target=\"_blank\">August 3, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.x.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Comment un g\u00e9n\u00e9rateur de nombres al\u00e9atoires d\u00e9faillant a bris\u00e9 le stockage \u00e0 froid<\/h2>\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><strong>Coinkite<\/strong>, le fabricant canadien de Coldcard, a confirm\u00e9 qu&rsquo;une erreur de micrologiciel datant de mars 2021 a caus\u00e9 une vuln\u00e9rabilit\u00e9 dans son g\u00e9n\u00e9rateur de nombres pseudo-al\u00e9atoires (PRNG) lors de la cr\u00e9ation des phrases de r\u00e9cup\u00e9ration (seed phrases).<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Au lieu d&rsquo;utiliser un g\u00e9n\u00e9rateur de nombres al\u00e9atoires mat\u00e9riel, le micrologiciel s&rsquo;appuyait sur le num\u00e9ro de s\u00e9rie de la puce et les registres d&rsquo;horloge. Ce d\u00e9faut a r\u00e9duit le nombre de cl\u00e9s potentielles d&rsquo;une immensit\u00e9 cryptographique \u00e0 un ensemble d\u00e9nombrable.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Cela a permis aux attaquants de g\u00e9n\u00e9rer des cl\u00e9s candidates, d&rsquo;en d\u00e9river les adresses Bitcoin correspondantes et de les v\u00e9rifier par rapport \u00e0 la blockchain publique, sans jamais impliquer l&rsquo;appareil de la victime.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><strong>Galaxy Research<\/strong> a d\u00e9taill\u00e9 la premi\u00e8re vague d&rsquo;attaques, au cours de laquelle 1 082,65 BTC ont \u00e9t\u00e9 vol\u00e9s sur 1 196 adresses en seulement 41 minutes le 30 juillet.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Une vague ult\u00e9rieure a ajout\u00e9 environ 208 BTC provenant de 1 912 adresses en utilisant des techniques plus sophistiqu\u00e9es, comme le regroupement (batching) de plusieurs victimes dans une seule transaction. Galaxy estime que les attaques sont orchestr\u00e9es par un op\u00e9rateur unique, bien que le lien formel entre les trois vagues n&rsquo;ait pas encore \u00e9t\u00e9 \u00e9tabli.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">$1.6 million dollars in Bitcoin was drained from my account on July 29th in the Cold Card wallet hack.<br><br>My Bitcoin was in cold storage. My keys were on a ColdCard device kept in a safety deposit box that had never been connected to the internet.<br><br>This part&#39;s nerdy, but here&#39;s\u2026 <a href=\"https:\/\/t.co\/Lf9kJv9Jo4\" rel=\"nofollow\" target=\"_blank\">pic.twitter.com\/Lf9kJv9Jo4<\/a><\/p>&mdash; Jonathan Goodman \ud83c\udde8\ud83c\udde6 (@itscoachgoodman) <a href=\"https:\/\/x.com\/itscoachgoodman\/status\/2083527082223563157?ref_src=twsrc%5Etfw\" rel=\"nofollow\" target=\"_blank\">August 1, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.x.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Crypto Hack : Quels portefeuilles sont touch\u00e9s et que faire maintenant ?<\/h2>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Coinkite a initialement alert\u00e9 les utilisateurs des appareils <strong>Mk3<\/strong> utilisant la version 4.0.1 ou ult\u00e9rieure du micrologiciel, avant d&rsquo;\u00e9tendre cet avertissement \u00e0 certaines versions des mod\u00e8les <strong>Mk4<\/strong>, <strong>Mk5<\/strong> et <strong>Coldcard Q<\/strong>. Des mises \u00e0 jour d&rsquo;urgence ont \u00e9t\u00e9 publi\u00e9es, et le PDG <strong>Rodolfo Novak<\/strong> a pr\u00e9sent\u00e9 ses excuses, assumant la \u00ab\u00a0pleine responsabilit\u00e9\u00a0\u00bb de ce bug.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Cependant, la mise \u00e0 jour du micrologiciel ne r\u00e9sout pas le probl\u00e8me si la phrase de r\u00e9cup\u00e9ration a \u00e9t\u00e9 g\u00e9n\u00e9r\u00e9e sur une version vuln\u00e9rable. Les utilisateurs doivent imp\u00e9rativement cr\u00e9er une nouvelle phrase de r\u00e9cup\u00e9ration et migrer leurs fonds vers un nouveau portefeuille. Cet incident souligne que la qualit\u00e9 de l&rsquo;impl\u00e9mentation de l&rsquo;entropie est plus cruciale pour la s\u00e9curit\u00e9 d&rsquo;un hardware wallet que la simple r\u00e9putation de la marque.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Le PDG de Jan3, <strong>Samson Mow<\/strong>, a exhort\u00e9 tous les utilisateurs de Coldcard \u00e0 migrer leurs fonds en raison des attaques persistantes. <strong>Clay Garrett<\/strong> de chez Block a not\u00e9 qu&rsquo;un compte payant avait \u00e9t\u00e9 utilis\u00e9 pour identifier les adresses sources lors de ces attaques, et que ces informations ont \u00e9t\u00e9 transmises aux autorit\u00e9s.<\/p>\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Le tableau d&rsquo;ensemble : l&rsquo;auto-conservation d\u00e9place le risque, elle ne l&rsquo;efface pas<\/h2>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Cet incident de crypto hack refl\u00e8te une tendance observ\u00e9e en 2026, o\u00f9 les compromissions d&rsquo;infrastructures et de cl\u00e9s, bien que moins nombreuses, sont \u00e0 l&rsquo;origine de la majorit\u00e9 des pertes financi\u00e8res dans l&rsquo;industrie.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Des sp\u00e9culations sur X sugg\u00e8rent que des outils d&rsquo;IA pourraient avoir jou\u00e9 un r\u00f4le dans la d\u00e9couverte ou l&rsquo;exploitation de la faille, mais cela n&rsquo;a \u00e9t\u00e9 confirm\u00e9 ni par Coinkite ni par Block.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">L&rsquo;\u00e9pisode Coldcard rappelle un principe crucial : la force d&rsquo;un hardware wallet d\u00e9pend de l&rsquo;al\u00e9atoire utilis\u00e9 pour la g\u00e9n\u00e9ration des cl\u00e9s. Comme le souligne Galaxy Research, le co\u00fbt d\u00e9croissant de l&rsquo;analyse des espaces de cl\u00e9s faibles impose \u00e0 l&rsquo;industrie d&rsquo;am\u00e9liorer ses normes de v\u00e9rification de l&rsquo;entropie.<\/p>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Pour ceux qui d\u00e9tiennent du Bitcoin en auto-conservation, il est essentiel de v\u00e9rifier la version de votre micrologiciel par rapport aux avis de Coinkite, de g\u00e9n\u00e9rer une nouvelle cl\u00e9 sur un micrologiciel \u00e0 jour et de transf\u00e9rer vos fonds pour garantir leur s\u00e9curit\u00e9.<\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>Un crypto hack massif cible Coldcard : 1 367 BTC vol\u00e9s via une faille de micrologiciel. D\u00e9couvrez si votre portefeuille Bitcoin est concern\u00e9.<\/p>\n","protected":false},"author":135978,"featured_media":37372,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[6],"tags":[],"coin":[15],"class_list":["post-37376","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actu"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Crypto Hack : 86 millions $ d\u00e9rob\u00e9s sur les portefeuilles Coldcard<\/title>\n<meta name=\"description\" content=\"Un crypto hack massif cible Coldcard : 1 367 BTC vol\u00e9s via une faille de micrologiciel. 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