{"id":625,"date":"2017-05-13T00:53:54","date_gmt":"2017-05-13T00:53:54","guid":{"rendered":"https:\/\/warp.lacnic.net\/?p=625\/"},"modified":"2018-11-20T17:14:34","modified_gmt":"2018-11-20T17:14:34","slug":"ransomware-wanacrypt0r-recommendations","status":"publish","type":"post","link":"https:\/\/csirt.lacnic.net\/en\/news\/ransomware-wanacrypt0r-recommendations","title":{"rendered":"Ransomware WanaCrypt0r \u2013 Recommendations"},"content":{"rendered":"<p>On Friday, May 12, 2017, a cybersecurity incident was reported which some organizations in the world suffered.<\/p>\n<p>This is an attack on a \u201c0-day\u201d vulnerability where a massive infection of computers was registered because of ransomware malware called WanaCrypt0r, a variant of WCrypt\/WannaCry. Such malicious software that encrypts the affected system information and continues spread on the internet, with the passage of hours.<\/p>\n<p>It&#8217;s suspected that this virus enters on the computer&#8217;s organizations through an email attachment, which exploits an operating system vulnerability. .<\/p>\n<p>The infection and propagation is performed only on computers with a Windows operating system, using as a vector a vulnerability in the Windows File and Folder Sharing (SMB) system.<\/p>\n<h3>Given the criticality, it is recommended to apply the security patches of urgency taking into account that the affected resources are:<\/h3>\n<ul>\n<li>Microsoft Windows Vista SP2<\/li>\n<li>Windows Server 2008 SP2 and R2 SP1<\/li>\n<li>Windows 7<\/li>\n<li>Windows 8.1<\/li>\n<li>Windows RT 8.1<\/li>\n<li>Windows Server 2012 and R2<\/li>\n<li>Windows 10<\/li>\n<li>Windows Server 2016<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>It is recommended to apply the latest security patches that Microsoft released on 05\/10\/2017:<\/strong> <a href=\"https:\/\/support.microsoft.com\/en-us\/help\/4012215\/march-2017-security-monthly-quality-rollup-for-windows-7-and-2008_r2\">https:\/\/support.microsoft.com\/en-us\/help\/4012215\/march-2017-security-monthly-quality-rollup-for-windows-7-and-2008_r2<\/a>.<br \/>\n<strong>For more details on this security patch, please consult:<\/strong> <a href=\"https:\/\/www.certsi.es\/alerta-temprana\/avisos-seguridad\/boletines-seguridad-microsoft-mayo-2017\">https:\/\/www.certsi.es\/alerta-temprana\/avisos-seguridad\/boletines-seguridad-microsoft-mayo-2017<\/a>.<br \/>\nNote that Windows XP does NOT have a patch reported by Microsoft against this vulnerability.<\/p>\n<h3>In addition, as mitigation measures, it is recommended:<\/h3>\n<ul>\n<li>Isolate infected computers from the network.<\/li>\n<li>Block communication of 137 \/ UDP and 138 \/ UDP ports as well as 139 \/ TCP and 445 \/ TCP ports in organizations&#8217; networks.<\/li>\n<li>Block port 445 at edge of network: Prevent automatic entry of ransom from outside the network.<\/li>\n<li>Block port 445 in internal network traffic: The above will interrupt the windows shared folder system (SMB).<\/li>\n<li>Avoid opening files and \/ or links from unknown sources whether they are received by email or downloaded from untrusted websites.<\/li>\n<li>Backup all your company critical information.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>On Friday, May 12, 2017, a cybersecurity incident was reported which some organizations in the world suffered. This is an attack on a \u201c0-day\u201d vulnerability where a massive infection of computers was registered because of ransomware malware called WanaCrypt0r, a variant of WCrypt\/WannaCry. Such malicious software that encrypts the affected system information and continues spread [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[46,18,24],"tags":[],"class_list":["post-625","post","type-post","status-publish","format-standard","hentry","category-archive","category-news","category-security-alerts"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>LACNIC CSIRT - Ransomware WanaCrypt0r \u2013 Recommendations<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/csirt.lacnic.net\/en\/news\/ransomware-wanacrypt0r-recommendations\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LACNIC CSIRT - Ransomware WanaCrypt0r \u2013 Recommendations\" \/>\n<meta property=\"og:description\" content=\"On Friday, May 12, 2017, a cybersecurity incident was reported which some organizations in the world suffered. This is an attack on a \u201c0-day\u201d vulnerability where a massive infection of computers was registered because of ransomware malware called WanaCrypt0r, a variant of WCrypt\/WannaCry. 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