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Flash player javascript download2/17/2023 Steganography in CSSīoth of these two cases conceal malware within real, benign files - a technique referred to as steganography.ĭuring a recent investigation this October, we came across another interesting variant leveraging the same technique. However, this script was only used as a dictionary of characters to build a URL for the real payload ( priangancom/wp-content/languages/blogid/favicon.ico and lebssite/favicon.ico in other variations). But there’s some extra characters, which are strange, so let’s see what’s actually going on /fk0dCh1dETįrom the sample in his tweet, the “ URL is clearly visible within the malicious script. Obfuscated code that has a weird google-analyticscom URL in it, which is the proper Google controlled domain. Just something I’ve noticed more recently with digital skimmers/ #magecart. ico files to conceal JavaScript skimmers. In a tweet, Affable Kraut also reported another similar obfuscation technique using. This summer, MalwareBytes researcher Jérôme Segura wrote an article about how criminals use image files (.ico) to hide JavaScript credit card stealers on compromised e-commerce sites.
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