{"id":14571,"date":"2021-03-25T17:26:58","date_gmt":"2021-03-25T15:26:58","guid":{"rendered":"https:\/\/www.lisot.com\/atac-a-microsoft-exchange-server\/"},"modified":"2021-03-25T17:26:59","modified_gmt":"2021-03-25T15:26:59","slug":"atac-a-microsoft-exchange-server","status":"publish","type":"post","link":"https:\/\/www.lisot.com\/ca\/atac-a-microsoft-exchange-server\/","title":{"rendered":"L&#8217;Atac de *HAFNIUM a Microsoft *Exchange *Server o la import\u00e0ncia d&#8217;estar ben protegit"},"content":{"rendered":"<p>Recentment hem pogut veure de primera m\u00e0 la import\u00e0ncia de tenir un <a href=\"https:\/\/www.lisot.com\/mantenimiento-informatico-barcelona\/\">servei de manteniment t\u00e8cnic,<\/a> una bona <a href=\"https:\/\/www.lisot.com\/soluciones-de-seguridad-informatica-para-empresas\/\">implementaci\u00f3 de mesures de seguretat<\/a> i un <a href=\"https:\/\/www.lisot.com\/por-que-es-importante-tener-actualizado-el-sistema-operativo\/\">programari actualitzat.<\/a><\/p>\n<p>Unes vulnerabilitats en els <a href=\"https:\/\/docs.microsoft.com\/es-es\/exchange\/\" target=\"_blank\" rel=\"noopener\">servidors de Microsoft Exchange<\/a> explotades per hackers van posar en perill la privacitat i la seguretat de milers d&#8217;empreses a tot el m\u00f3n. Els primers pegats de seguretat (per a les versions m\u00e9s recents) van ser publicats per Microsoft al mateix temps que un <a href=\"https:\/\/en.wikipedia.org\/wiki\/Hafnium_(group)\" target=\"_blank\" rel=\"noopener\">grup de hackers denominat HAFNIUM<\/a> intercanviava les maneres d&#8217;explotar aquests forats de seguretat. \u00c9s per aix\u00f2 que la rapidesa d&#8217;implementaci\u00f3 de les actualitzacions era crucial per a garantir la privacitat de les dades.<\/p>\n<p>Estem orgullosos de la celeritat amb la qual els nostres t\u00e8cnics van implementar les millores en els servidors dels nostres clients, ja que vam poder aplicar els pegats quan es van publicar. <strong>Aquesta agilitat, juntament amb les mesures extra de seguretat que implementem en tots els nostres servidors ha mantingut fora de perill a tots els nostres clients d&#8217;aquest atac massiu.<\/strong><\/p>\n<p>Volem agrair la confian\u00e7a dipositada en nosaltres per tots ells i recordar la import\u00e0ncia de <a href=\"https:\/\/www.lisot.com\/por-que-es-importante-tener-actualizado-el-sistema-operativo\/\">mantenir actualitzats tots els programes<\/a> i utilitzar contrasenyes segures i anar-les modificant peri\u00f2dicament.<\/p>\n<p>Us deixem aqu\u00ed la cronologia dels fets:<\/p>\n<ul>\n<li><strong>Desembre 2020:<\/strong>\n<ul>\n<li>Una petita empresa especialitzada en seguretat (DevCore) indica a Microsoft que ha descobert alguns forats de seguretat a Exchange Server.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Gener 2021:<\/strong>\n<ul>\n<li>Dues empreses de seguretat detecten activitat an\u00f2mala en servidors Microsoft Exchange Server.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Finals de febrer de 2021:<\/strong>\n<ul>\n<li>Microsoft notifica a DevCore que estan prop de poder resoldre el problema de seguretat i llan\u00e7ar una actualitzaci\u00f3 de seguretat.<\/li>\n<\/ul>\n<\/li>\n<li><strong>2 Mar\u00e7 2021:<\/strong>\n<ul>\n<li>Microsoft revela l&#8217;exist\u00e8ncia de forats de seguretat en els seus servidors Exchange.<\/li>\n<li><a href=\"https:\/\/cnnespanol.cnn.com\/2021\/03\/03\/microsoft-hackers-china-exchange-correo-electronico-trax\/\" target=\"_blank\" rel=\"noopener\"> Microsoft comunica que un grup de hackers (*HAFNIUM) des de la Xina ha realitzat atacs a servidors Exchange. <\/a><\/li>\n<li>Microsoft publica els primers pegats de seguretat per als servidors Exchange per a les versions dins de suport (les dues \u00faltimes actualitzacions acumulatives de Exchange 2016 i Exchange 2019)<\/li>\n<\/ul>\n<\/li>\n<li><strong>3 de Mar\u00e7 de 2021:<\/strong>\n<ul>\n<li><a href=\"https:\/\/us-cert.cisa.gov\/ncas\/alerts\/aa21-062a\">L&#8217;Ag\u00e8ncia de Seguretat d&#8217;Infraestructura i Ciberseguretat (CISA) alerta perqu\u00e8 les empreses revisin els seus servidors Microsoft Exchange.<\/a><\/li>\n<\/ul>\n<\/li>\n<li><strong>5 de Mar\u00e7 de 2021:<\/strong>\n<ul>\n<li>Microsoft indica que posar pegats els servidors no \u00e9s suficient, ja que poden haver estat compromesos amb anterioritat amb rastres de webshell.<\/li>\n<li>Microsoft publica un script nmap per a ajudar a descobrir possibles vanejats de servidor realitzades amb anterioritat.<\/li>\n<\/ul>\n<\/li>\n<li><strong>6 de Mar\u00e7 de 2021:<\/strong>\n<ul>\n<li>The Wall Street Journal publica que mes de 250.000 organitzacions han estat compromeses.<\/li>\n<\/ul>\n<\/li>\n<li><strong>7 de Mar\u00e7 de 2021:<\/strong>\n<ul>\n<li>Microsoft actualitza el pegat de seguretat amb un esc\u00e0ner de vulnerabilitats per a detectar si el servidor ha estat comprom\u00e8s.<\/li>\n<li>La Casa Blanca insta els operadors inform\u00e0tics \u2013 ISP\u2019s al fet que actualitzin i posin pegats els seus servidors Microsoft Exchange i verifiquin si els seus sistemes han estat compromesos.<\/li>\n<\/ul>\n<\/li>\n<li><strong>10 de Mar\u00e7 de 2021:<\/strong>\n<ul>\n<li>ESET \u2013 NOD32 (fabricant d&#8217;Antivirus) informa de 10 diferents exploits per a accedir a la vulnerabilitat de Exchange Server. Tamb\u00e9 detecta m\u00e9s de 5.000 servidors de Microsoft Exchange compromesos.<\/li>\n<li>L&#8217;FBI i CISA informen de les fallades de seguretat i de com mitigar-les.<\/li>\n<\/ul>\n<\/li>\n<li><strong>11 de Mar\u00e7 de 2021:<\/strong>\n<ul>\n<li>Hackers inform\u00e0tics estan explotant la vulnerabilitat de forma generalitzada han pres la davantera a Microsoft en l&#8217;explotaci\u00f3 de la vulnerabilitat de Exchange.<\/li>\n<li>Microsoft detecta un nou grup d&#8217;atacs als seus servidors Exchange.<\/li>\n<\/ul>\n<\/li>\n<li><strong>15 de Mar\u00e7 de 2021:<\/strong>\n<ul>\n<li>El nombre d&#8217;atacs a servidors *Exchange passa de 700 a 7.200.<\/li>\n<li>Microsoft publica una nova eina per a versions fora de suport i amb una interf\u00edcie m\u00e9s amigable per a posar pegats els servidors.<\/li>\n<\/ul>\n<\/li>\n<li><strong>18 de Mar\u00e7 de 2021:<\/strong>\n<ul>\n<li>L&#8217;\u00faltima versi\u00f3 de Microsoft Defensar Antivirus autom\u00e0ticament mitiga i soluciona la vulnerabilitat dels servidors Exchange.<\/li>\n<\/ul>\n<\/li>\n<li><strong>19 de Mar\u00e7 de 2021:<\/strong>\n<ul>\n<li>La companyia fabricant de PCs ACER ha estat atacada a trav\u00e9s d&#8217;aquesta vulnerabilitat de Exchange Server i els seus correus han estat compromesos.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Recentment hem pogut veure de primera m\u00e0 la import\u00e0ncia de tenir un servei de manteniment t\u00e8cnic, una bona implementaci\u00f3 de mesures de seguretat i un programari actualitzat. Unes vulnerabilitats en els servidors de Microsoft Exchange explotades per hackers van posar en perill la privacitat i la seguretat de milers d&#8217;empreses a tot el m\u00f3n. Els primers  [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":14570,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[70,93],"tags":[202,189,71,196,72,73,279,103,144,157,117,278,74],"class_list":["post-14571","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciberseguridad-ca","category-mantenimiento-informatico-ca","tag-actualitzacions-windows","tag-amenaces-de-seguretat","tag-ciberataque-ca","tag-ciberdelinquents","tag-ciberseguridad-ca","tag-hackers-ca","tag-hafnium-ca","tag-manteniment-informatic","tag-manteniment-informatic-empresarial","tag-manteniment-informatic-preventiu","tag-microsoft-ca","tag-microsoft-exchange-server-ca","tag-seguridad-informatica-ca"],"yoast_head":"<!-- This site is optimized 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