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Home Alerts

Hiding Keylogger RAT Malware in SVG Files

March 7, 2024
Reading Time: 5 mins read
in Alerts
Hiding Keylogger RAT Malware in SVG Files

Threat actors are resorting to concealing malware within SVG image files to avoid detection and facilitate the delivery of ransomware, banking Trojans, and other malicious payloads. Utilizing the Scalable Vector Graphic (SVG) file format’s capacity for mathematical descriptions of images, hackers are evading security measures with open-source tools like AutoSmuggle, embedding harmful files within SVG or HTML content.

Despite the initial observations of SVG file-based malware delivery dating back to 2015, threat actors have progressively refined their tactics, using SVG files to distribute Ursnif malware in 2017 and QakBot malware in 2022.

Notably, recent campaigns involving Agent Tesla Keylogger and XWorm RAT have been identified, wherein SVG files were used to initiate the delivery of malicious payloads, showcasing threat actors’ enhanced deceptive capabilities. To combat these evolving SVG-based malware threats, the researchers emphasize the inadequacy of traditional defenses reliant on file extensions and recommend the implementation of robust mitigation strategies.

This campaign’s use of SVG files to distribute Agent Tesla Keylogger and XWorm RAT malware underscores the increasing sophistication of threat actors in concealing and distributing harmful payloads. As SVG files leverage mathematical equations for image description, they provide an avenue for evading security measures, enabling threat actors to deliver malware payloads, including keyloggers and RATs, with heightened stealth and deception.

The campaign’s deployment of AutoSmuggle, an open-source tool tailored for embedding malicious files within SVG or HTML content, further amplifies the significance of this malware delivery tactic. Additionally, the researchers’ observations emphasize the continual evolution and refinement of strategies by threat actors to effectively bypass security measures, as evidenced by the enhanced deceptive capabilities exhibited in recent SVG-based campaigns.

In response to these emerging SVG-based malware threats, the researchers advocate for the implementation of robust mitigation strategies and caution against overreliance on traditional defenses based on file extensions, recognizing the imperative need for adaptive security measures to safeguard against these evolving and increasingly sophisticated malware tactics.

Reference:
  • Malicious SVG Image Files Conceal Keylogger and RAT Malware

Tags: Cyber AlertCyber Alerts 2024Cyber RiskCyber threatCybersecurityHTMLMarch 2024Scalable Vector GraphicSVGSVG imageThreat Actors
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