![]() Finally, the creators of the extensions collect data on each user, which Avast has determined to include anything from IP addresses to birth dates and device information, such as MAC addresses. The malware also functions as a JavaScript-injection where threat actors can download additional malware to a target machine. According to reports from users dealing with the infections, the malware causes site redirects that appear to be monetized on each click. ![]() This is far from the first time that browser extensions have been implicated in malicious activity.īased on Avast’s research, the nature of the malware in these extensions seems to be driven by monetary pursuits. ![]() ![]() Such extensions include Video Downloader for Facebook, Vimeo Video Downloader, Instagram Story Downloader, and VK Unblock. The third-party extensions in question are used for customers of companies like Facebook and Vimeo. The information comes from a press release dated December 16 and warns that 3 million Google Chrome and Microsoft Edge users are at risk for malware infections. Researchers at Prague-based cybersecurity company Avast are alerting the public about malicious browser extensions.
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