15/06/2025
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Reduce this article to less than 200 words; Over 269,000 Websites Infected with JSFireTruck JavaScript Malware in One Month. Cybersecurity researchers are calling attention to a "large-scale campaign" that has been observed compromising legitimate websites with malicious JavaScript injections. According to Palo Alto Networks Unit 42, these malicious injects are obfuscated using JSF**k, which refers to an "esoteric and educational programming style" that uses only a limited set of characters to write and execute code. The cybersecurity company has given the technique an alternate name JSFireTruck owing to the profanity involved. "Multiple websites have been identified with injected malicious JavaScript that uses JSFireTruck obfuscation, which is composed primarily of the symbols [, ], +, $, {, and }," security researchers Hardik Shah, Brad Duncan, and Pranay Kumar Chhaparwal said. "The code's obfuscation hides its true purpose, hindering analysis." Further analysis has determined that the injected code is designed to check the website referrer ("document.referrer"), which identifies the address of the web page from which a request originated. 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. 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 observed in a single day. "The campaign's scale and stealth pose a significant threat," the researchers said. "The widespread nature of these infections suggests a coordinated effort to compromise legitimate websites as attack vectors for further malicious activities." Say Hello to HelloTDS # The development comes as Gen Digital too
