{"id":6825,"date":"2025-06-13T10:37:21","date_gmt":"2025-06-13T10:37:21","guid":{"rendered":"http:\/\/localhost\/?p=6825"},"modified":"2025-06-13T10:37:21","modified_gmt":"2025-06-13T10:37:21","slug":"over-269000-websites-infected-with-jsfiretruck-javascript-malware-in-one-month","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=6825","title":{"rendered":"Over 269,000 Websites Infected with JSFireTruck JavaScript Malware in One Month"},"content":{"rendered":"<h2>Security Update News<\/h2>\n<h3>Update Information<\/h3>\n<table style=\"width:100%; border-collapse: collapse; margin-bottom: 20px;\">\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Title<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">Over 269,000 Websites Infected with JSFireTruck JavaScript Malware in One Month<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Update ID<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">THN:3EC00BAA681E007445FD32DC9BE05EF2<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Type<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">thn<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Published<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">2025-06-13T14:12:00<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Last Updated<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">2025-06-13T14:12:39<\/td>\n<\/tr>\n<\/table>\n<h3>Security Impact<\/h3>\n<table style=\"width:100%; border-collapse: collapse; margin-bottom: 20px;\">\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">CVSS Score<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">0.0<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Severity<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd; color: #666666; font-weight: bold;\">NONE<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Attack Vector<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\"><\/td>\n<\/tr>\n<\/table>\n<h3>Affected CVEs<\/h3>\n<div style=\" padding: 15px; border: 1px solid #ddd; margin-bottom: 20px;\">\n<ul style=\"margin: 0; padding-left: 20px;\">\n<\/ul>\n<\/div>\n<h3>Update Details<\/h3>\n<div style=\"; padding: 15px; border-left: 4px solid #4CAF50; margin-bottom: 20px;\">\n![JSFireTruck JavaScript Malware](data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8Xw8AAoMBgDTD2qgAAAAASUVORK5CYII=)<\/p>\n<p>Cybersecurity researchers are calling attention to a &#8220;large-scale campaign&#8221; that has been observed compromising legitimate websites with malicious JavaScript injections.<\/p>\n<p>According to Palo Alto Networks Unit 42, these malicious injects are obfuscated using JSFuck, which refers to an &#8220;esoteric and educational programming style&#8221; that uses only a limited set of characters to write and execute code.<\/p>\n<p>The cybersecurity company has given the technique an alternate name JSFireTruck owing to the profanity involved.<\/p>\n<p>&#8220;Multiple websites have been identified with injected malicious JavaScript that uses JSFireTruck obfuscation, which is composed primarily of the symbols [, ], +, $, {, and },&#8221; security researchers Hardik Shah, Brad Duncan, and Pranay Kumar Chhaparwal said. &#8220;The code&#8217;s obfuscation hides its true purpose, hindering analysis.&#8221;<\/p>\n<p>![Cybersecurity](data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8Xw8AAoMBgDTD2qgAAAAASUVORK5CYII=)<\/p>\n<p>Further analysis has determined that the injected code is designed to check the website referrer (&#8220;document.referrer&#8221;), which identifies the address of the web page from which a request originated. <\/p>\n<p>Should the referrer be a search engine such as Google, Bing, DuckDuckGo, Yahoo!, or AOL, the JavaScript code redirects victims to malicious URLs that can deliver malware, exploits, traffic monetization, and malvertising.<\/p>\n<p>![](data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8Xw8AAoMBgDTD2qgAAAAASUVORK5CYII=)<\/p>\n<p>Unit 42 said its telemetry uncovered 269,552 web pages that have been infected with JavaScript code using the JSFireTruck technique between March 26 and April 25, 2025. A spike in the campaign was first recorded on April 12, when over 50,000 infected web pages were recorded in a single day.<\/p>\n<p>&#8220;The campaign&#8217;s scale and stealth pose a significant threat,&#8221; the researchers said. &#8220;The widespread nature of these infections suggests a coordinated effort to compromise legitimate websites as attack vectors for further malicious activities.&#8221;<\/p>\n<p>## Say Hello to HelloTDS<\/p>\n<p>The development comes as Gen Digital took the wraps off a sophisticated Traffic Distribution Service (TDS) called HelloTDS that&#8217;s designed to conditionally redirect site visitors to fake CAPTCHA pages, tech support scams, fake browser updates, unwanted browser extensions, and cryptocurrency scams through remotely-hosted JavaScript code injected into the sites.<\/p>\n<p>The primary objective of the TDS is to act as a gateway, determining the exact nature of content to be delivered to the victims after fingerprinting their devices. If the user is not deemed a suitable target, the victim is redirected to a benign web page.<\/p>\n<p>![](data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8Xw8AAoMBgDTD2qgAAAAASUVORK5CYII=)<\/p>\n<p>&#8220;The campaign entry points are infected or otherwise attacker-controlled streaming websites, file sharing services, as well as malvertising campaigns,&#8221; researchers Vojt\u011bch Krejsa and Milan \u0160pinka said in a report published this month.<\/p>\n<p>&#8220;Victims are evaluated based on geolocation, IP address, and browser fingerprinting; for example, connections through VPNs or headless browsers are detected and rejected.&#8221;<\/p>\n<p>Some of these attack chains have been found to serve bogus CAPTCHA pages that leverage the ClickFix strategy to trick users into running malicious code and infecting their machines with a malware known as PEAKLIGHT (aka Emmenhtal Loader), which is known to server information stealers like Lumma.<\/p>\n<p>![Cybersecurity](data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8Xw8AAoMBgDTD2qgAAAAASUVORK5CYII=)<\/p>\n<p>Central to the HelloTDS infrastructure is the use of .top, .shop, and .com top-level domains that are used to host the JavaScript code and trigger the redirections following a multi-stage fingerprinting process engineered to collect network and browser information.<\/p>\n<p>&#8220;The HelloTDS infrastructure behind fake CAPTCHA campaigns demonstrates how attackers continue to refine their methods to bypass traditional protections, evade detection, and selectively target victims,&#8221; the researchers said.<\/p>\n<p>&#8220;By leveraging sophisticated fingerprinting, dynamic domain infrastructure, and deception tactics (such as mimicking legitimate websites and serving benign content to researchers) these campaigns achieve both stealth and scale.&#8221;<\/p>\n<p>Found this article interesting? Follow us on Twitter _\uf099_ and LinkedIn to read more exclusive content we post.\n<\/div>\n<p><a href=\"https:\/\/thehackernews.com\/2025\/06\/over-269000-websites-infected-with.html\" target=\"_blank\" style=\"display: inline-block; color: white; padding: 10px 20px; text-decoration: none; border-radius: 4px;\">View Advisory Details<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Security Update News Update Information Title Over 269,000 Websites Infected with JSFireTruck JavaScript Malware in One Month Update ID THN:3EC00BAA681E007445FD32DC9BE05EF2 Type thn Published 2025-06-13T14:12:00 Last&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[6,8,34,12,13,33,7,11,43,5],"class_list":["post-6825","post","type-post","status-publish","format-standard","hentry","category-category_news","tag-cve","tag-cvss","tag-cvss-00","tag-exploit","tag-news","tag-none","tag-security","tag-tapic","tag-thn","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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