In recent years, web skimming attacks have become increasingly prevalent, with the attackers’ infrastructure being notably intricate. Cybercriminals go to great lengths to develop a robust infrastructure that enables them to carry out orchestrated web skimming campaigns with remarkable efficacy. This article will examine the attackers’ infrastructure, their methods for exploiting host websites, how they enhance the attack’s stealthiness, and techniques they use to evade detection. Additionally, we’ll provide recommendations on how to stay protected from these types of attacks.
The Infrastructure of Attackers
The meticulous arrangement of the attackers’ infrastructure is remarkably executed, starting with their ability to infiltrate susceptible and legitimate websites. They exploit vulnerabilities or employ any available means to accomplish this task, focusing primarily on small or medium-sized retail platforms where they can covertly embed their malicious code.
Once they gain access to these websites, they use them as hosts for malicious code, enabling them to carry out Magecart-style web skimming attacks. The malicious code is hidden from the website’s owner and is designed to steal user information, such as credit card numbers, email addresses, and phone numbers.
Attackers conduct web skimming attacks by exploiting vulnerable host websites. They use these websites as an access point for their skimming code, which is used to compromise a user’s credit card or financial information and steal it from the website. Once compromised, attackers typically sell the information on the dark web, where cybercriminals can purchase the data and use it for their own purposes.
Magecart-style attacks are of particular concern because they are designed to blend in with legitimate website code. Attackers often use unique, custom code to evade detection, making it nearly impossible to identify malicious activity. Additionally, they exploit the host website’s trust factor, making it challenging to spot the malicious code.
Enhancing Attackers’ Stealthiness
To enhance their attack’s stealthiness, attackers rely on a variety of techniques designed to obfuscate the skimmer and minimize suspicion. One technique they use is Base64 encoding, which obfuscates the data during transmission, making it more difficult to identify and trace.
Additionally, they conceal the host’s URL and structure the skimmer to resemble trusted third-party services such as Google Tag Manager or Facebook Pixel. This disguise ensures that the malicious code goes unnoticed, increasing the chances of success.
Techniques to evade detection
The attacker implements three distinct techniques aimed at evading detection and remaining undetected. First, they use obfuscation to impede debugging and research, deliberately making it difficult to understand the exact sequence of the attack. Second, they utilize HTTP requests in the form of an IMG tag nested within the skimmer to enable them to transmit data without detection. Third, they use Base64 encoding to obfuscate the data during transmission, making it challenging to trace the origin of the data.
Recommendations for Security Professionals
To stay protected from web skimming attacks, security professionals must stay updated with the latest patches and enhance their security measures by incorporating a Web Application Firewall (WAF). They should also ensure thorough collection and vigilant monitoring of critical events and insightful data to enable prompt and efficient mitigation measures.
Web skimming attacks continue to pose a significant threat to organizations across all sectors. Cybercriminals use sophisticated techniques to exploit websites, steal sensitive user information, and evade detection. Understanding the complexities of these attacks is key to staying protected. Implementing proper security measures like WAFs and staying up-to-date with the latest patches can go a long way towards preventing web skimming attacks.