Threat actors are increasingly using Scalable Vector Graphics (SVG) files to bypass traditional cybersecurity defenses. Unlike raster formats, SVGs store XML-structured data that can define vector shapes and text, enabling seamless scalability. However, this flexibility also allows attackers to embed executable JavaScript code within the file.
Malicious SVGs are often distributed through spear-phishing emails or cloud storage platforms, making it difficult for email security gateways to detect them due to their innocuous appearance. When opened, the SVG file loads in a browser, executing embedded scripts that decode obfuscated payloads and redirect victims to command-and-control (C2) phishing domains.
The sophistication of these attacks lies in the ability of SVGs to conceal malicious logic within its XML framework. Adversaries use techniques like CDATA sections to hide hex-encoded strings and XOR keys. Decoded payloads then utilize browser redirection to force users to hyper-realistic phishing pages mimicking legitimate services like Microsoft 365 or Google Workspace.
To mitigate these risks, organizations must adopt layered defenses incorporating deep content inspection tools capable of parsing XML and JavaScript within SVGs. Disabling automatic browser rendering for untrusted files and employee training programs emphasizing vigilance against unfamiliar attachments can also prevent successful breaches.
Integrating threat intelligence feeds and behavioral analytics into security operations centers is essential as cybercriminals refine these techniques. By treating SVGs not merely as images but as potential code execution vectors, enterprises can proactively address this evolving threat landscape, reducing the likelihood of successful breaches.
IOCs:
* Hash Value | 4aea855cde4c963016ed36566ae113b7
* Hash Value | 84ca41529259a2cea825403363074538
Source: https://gbhackers.com/hackers-exploit-svg-files-with-embedded-javascript