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    Securing Emails from Image-based Phishing Attacks

    By BUFFERZONE Team, 25/11/2024

    Target: IT (Elementary)

    Tags: Isolation, Safe Workspace®, Zero-day, Safe Browser, Protection By Containment™, SafeBridge®, NoCloud™, Prevention, Email Security

    In the evolving landscape of cyber threats, attackers constantly adapt to evade detection. One of the latest tactics involves using SVG (Scalable Vector Graphics) files as a vector for phishing attacks. These lightweight, vector-based images can include embedded JavaScript or hyperlinks that redirect victims to malicious sites, bypassing traditional email security filters. A recent report by BleepingComputer highlights the growing prevalence of such attacks.

    This blog explores how BUFFERZONE® SafeBridge® leverages Content Disarm and Reconstruction (CDR) technology to neutralize these threats, providing an unparalleled layer of security for organizations and keeping the IT safe.

    The Threat: How SVG Files Evade Detection

    Many systems inherently trust SVG files due to their standard web design and graphics use. Unfortunately, cybercriminals exploit this trust, embedding malicious scripts or links within SVG attachments. Common attack scenarios include:

    • Embedding clickable links that lead to phishing websites.
    • Using encoded JavaScript to redirect victims to fake login pages.
    • Evading antivirus solutions by leveraging the innocuous appearance of SVG files.

    Traditional defenses like antivirus software and email filters struggle to detect these threats because the SVG structure appears legitimate, making them an ideal phishing tool.

    The attacks occur when the victim receives a phishing email with an attached SVG file, often disguised with an innocent name like Invoice.SVG or Document.svg. The email might contain enticing or urgent language, prompting the user to open the attachment.

    When the victim opens the SVG file, it may appear harmless. SVG files are standard web graphic files trusted by many email systems and users. However, the SVG file may contain malicious embedded code in the form of:

    • JavaScript: Encoded within the SVG file, capable of executing redirections or other harmful actions.
    • Hyperlinks: Clickable links embedded directly into the SVG file, designed to look legitimate.
    • For more detailed information, we recommend reading our previous blog posts:
      • The Beginners Guide – Preventing the Invisible Malware How Steganography Works (Part-1) [Link]
      • The Beginners Guide – Preventing the Invisible Malware What Is Steganalysis and How CDR can improve. Our Security (Part-2) [Link]

    Make IT Simple with Safe Workspace®

    BUFFERZONE® Safe Workspace® is a comprehensive security suite of solutions powered by two advanced technologies: Protection By Containment™ and NoCloud™ AI security.  Protection By Containment™ isolates external threats, while NoCloud™ addresses risks that extend beyond containment. The suite includes Safe Mail, a Microsoft Outlook plugin that leverages SafeBridge® to perform Content Disarm and Reconstruction (CDR) on all incoming email.  Links and attachments are opened within a secure virtual containment environment, ensuring threats are neutralized in the virtual container. For web browsing threats, BUFFERZONE® Safe Browser operates within the containment environment, preventing potential attacks from escaping into the trusted user space.

    BUFFERZONE® SafeBridge® leverages advanced on-host Content Disarm and Reconstruction (CDR) technology to neutralize phishing threats before they reach end-users. This proactive solution eliminates malicious content while ensuring business continuity remains unaffected.

    Organizations can dramatically reduce risks by adopting a zero-trust prevention strategy that combines containment with SafeBridge® CDR, providing users with a safer environment.

    Unlike traditional detection-based methods that rely on signature matching or behavioral analysis, CDR takes a prevention-first approach. It proactively removes malicious elements from files, making it highly effective against novel or polymorphic threats designed to bypass conventional defenses.

    BUFFERZONE® SafeBridge® is not about detection—it is about proper prevention. Through CDR and containment, phishing emails and their attachments are effectively neutralized.  For suspicious links, BUFFERZONE® leverages NoCloud™ anti-phishing technology, powered by the Neural Processing Unit (NPU) to accelerate AI-driven detection directly on the host – ensuring sensitive data remains secure without relying on the cloud.