{"id":27903,"date":"2021-08-13T16:29:00","date_gmt":"2021-08-13T14:29:00","guid":{"rendered":"https:\/\/perseus.de\/synology-nas-devices-are-attacked-with-stealthworker-botnet-password-security-as-protection\/"},"modified":"2026-03-31T07:34:31","modified_gmt":"2026-03-31T05:34:31","slug":"synology-nas-devices-are-attacked-with-stealthworker-botnet-password-security-as-protection","status":"publish","type":"post","link":"https:\/\/perseus.de\/en\/synology-nas-devices-are-attacked-with-stealthworker-botnet-password-security-as-protection\/","title":{"rendered":"Synology NAS Devices Are Attacked with StealthWorker Botnet \u2013 Password Security as Protection"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"27903\" class=\"elementor elementor-27903 elementor-22942\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dcf4ec4 e-flex e-con-boxed e-con e-parent\" data-id=\"dcf4ec4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e1db58c elementor-widget elementor-widget-image\" data-id=\"e1db58c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"200\" src=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Gefahrenwarnung-Headerbild-Website-2025-1024x256.png\" class=\"attachment-large size-large wp-image-27799\" alt=\"\" srcset=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Gefahrenwarnung-Headerbild-Website-2025-1024x256.png 1024w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Gefahrenwarnung-Headerbild-Website-2025-300x75.png 300w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Gefahrenwarnung-Headerbild-Website-2025-768x192.png 768w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Gefahrenwarnung-Headerbild-Website-2025.png 1200w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1258a43 e-flex e-con-boxed e-con e-parent\" data-id=\"1258a43\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-2de4e88 e-con-full e-flex e-con e-child\" data-id=\"2de4e88\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4982c80 elementor-widget elementor-widget-text-editor\" data-id=\"4982c80\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h6>13.08.2021<\/h6>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8348bc5 elementor-widget elementor-widget-heading\" data-id=\"8348bc5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Synology NAS Devices Are Attacked with StealthWorker Botnet \u2013 Password Security as Protection\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-eb03842 e-con-full e-flex e-con e-child\" data-id=\"eb03842\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-91d0988 elementor-widget elementor-widget-text-editor\" data-id=\"91d0988\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>With the help of a botnet (networking of several computer programs that automatically and independently perform certain tasks), Synology NAS devices are currently being attacked. It tries to guess passwords and install malware. Password security is crucial in this attack.  <\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f85a5ad e-flex e-con-boxed e-con e-parent\" data-id=\"f85a5ad\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-fad2031 e-con-full e-flex e-con e-child\" data-id=\"fad2031\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8282d30 elementor-widget elementor-widget-text-editor\" data-id=\"8282d30\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>What happened?<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ee744d2 e-con-full e-flex e-con e-child\" data-id=\"ee744d2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5ea6506 elementor-widget elementor-widget-text-editor\" data-id=\"5ea6506\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>On August 9, security researchers at Taiwan&#8217;s Synology warned customers that the so-called &#8220;<a href=\"https:\/\/www.synology.com\/en-global\/company\/news\/article\/BruteForce\/Synology\">StealthWorker<\/a>&#8221; botnet had targeted their data storage products \u2013 also known as network-attached storage (NAS) devices. With the help of a brute force attack, an attempt is made to gain access and encrypt the targeted devices. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f1dfa8e e-flex e-con-boxed e-con e-parent\" data-id=\"f1dfa8e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bf4f09a elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"bf4f09a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a82985c e-flex e-con-boxed e-con e-parent\" data-id=\"a82985c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-482032b e-con-full e-flex e-con e-child\" data-id=\"482032b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b5f6a5c elementor-widget elementor-widget-text-editor\" data-id=\"b5f6a5c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>What are the risks to my business from attacking Synology products?<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8f5d6ed e-con-full e-flex e-con e-child\" data-id=\"8f5d6ed\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-057f5b5 elementor-widget elementor-widget-text-editor\" data-id=\"057f5b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The current attack is a brute force attack. These are usually based on guessing login data. The attackers usually use a list of known, common passwords. A software tries out all the passwords in this list. If it is exhausted or one of the attempts is successful, the network switches to another account. Synology&#8217;s security researchers have confirmed that they do not believe that the ongoing attack is related to an existing vulnerability in their products, but that it is an indiscriminate attack. The attack is allegedly carried out by the &#8220;StealthWorker&#8221; botnet. &#8220;StealthWorker&#8221; first appeared in 2019 when it targeted CMS e-commerce businesses. Synology issued a statement saying that they are working with several CERTs from around the world to take down the botnet.        <\/p><ol><li>If immediate patching is not possible, Spring has published workarounds to work around the problem for the time being<\/li><li>For IT administrators: Isolate affected systems into a &#8220;vulnerable VLAN&#8221; (Virtual Local Area Network).<\/li><li>Watch out for unauthorized configuration changes on all systems.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6237d73 e-flex e-con-boxed e-con e-parent\" data-id=\"6237d73\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9dde6dc elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"9dde6dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-02dd0e9 e-flex e-con-boxed e-con e-parent\" data-id=\"02dd0e9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-16d621d e-con-full e-flex e-con e-child\" data-id=\"16d621d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-89904c7 elementor-widget elementor-widget-text-editor\" data-id=\"89904c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>What can I do?<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fae461d e-con-full e-flex e-con e-child\" data-id=\"fae461d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0f04793 elementor-widget elementor-widget-text-editor\" data-id=\"0f04793\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>If you own a Synology NAS device, follow the steps below:<\/p>\n<ol>\n<li>Check your password security. Check your login details and make sure that your password is not used in other accounts, is unique and sufficiently complex. You can also consider using a password manager.  <\/li>\n<li>Turn on auto-lock and account protection. You can find step-by-step instructions &nbsp;<a href=\"https:\/\/kb.synology.com\/en-global\/DSM\/help\/DSM\/AdminCenter\/connection_security_account?version=6\">here<\/a>.<\/li>\n<li>If possible, add 2-factor authentication to your account. This solution informs you as soon as someone unexpectedly tries to log in and checks your authenticity in another way, e.g. via SMS. <\/li>\n<li>Synology has issued an additional protection instruction, which is available <a href=\"https:\/\/kb.synology.com\/en-us\/DSM\/tutorial\/How_to_add_extra_security_to_your_Synology_NAS\">here<\/a> .<\/li>\n<\/ol>\n<p><br><\/p><p>If you are having trouble finding the right solution for your device and you are a Perseus customer, please contact us.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>13.08.2021 Synology NAS Devices Are Attacked with StealthWorker Botnet \u2013 Password Security as Protection With the help of a botnet (networking of several computer programs that automatically and independently perform certain tasks), Synology NAS devices are currently being attacked. It tries to guess passwords and install malware. Password security is crucial in this attack. What [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":27902,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[64],"tags":[],"class_list":["post-27903","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hazard-warning"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Synology NAS Devices Are Attacked with StealthWorker Botnet \u2013 Password Security as Protection - Perseus Technologies<\/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:\/\/perseus.de\/en\/synology-nas-devices-are-attacked-with-stealthworker-botnet-password-security-as-protection\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Synology NAS Devices Are Attacked with StealthWorker Botnet \u2013 Password Security as Protection - Perseus Technologies\" \/>\n<meta property=\"og:description\" content=\"13.08.2021 Synology NAS Devices Are Attacked with StealthWorker Botnet \u2013 Password Security as Protection With the help of a botnet (networking of several computer programs that automatically and independently perform certain tasks), Synology NAS devices are currently being attacked. It tries to guess passwords and install malware. Password security is crucial in this attack. 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