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A brand new approach for spreading the QBot malware has gained reputation amongst hackers: they now distribute it through SVG information to smuggle HTML, domestically producing a malicious installer for Home windows.
On this assault, the focused browser is tricked into downloading a Base64-encoded model of the QBot malware installer hidden inside an SVG file.
Qbot or ‘QakBot’ is a Home windows malware that normally arrives through a phishing e mail that delivers different payloads akin to Cobalt Strike, Brute Ratel, and ransomware.
Smuggling HTML through SVG
Risk actors can use this technique to evade safety measures and firewalls that monitor for malicious information on the perimeter.
Cisco Talos researchers found a brand new QBot phishing marketing campaign that begins with a stolen reply chain e mail that prompts the person to open an hooked up HTML file. The malicious code on this attachment was launched through an HTML smuggling approach that embeds a base64-encoded Scalable Vector Graphics (SVG) picture.
In contrast to raster picture codecs like JPG and PNG, SVGs are XML-based vector photos that may legitimately embody HTML tags.
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