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GUEST COMMENT E-Skimming is on the rise this holiday season - how can retailers stay safe?

Online fraud such as skimming is rife this peak
Online fraud such as skimming is rife this peak
Greg Foss, Senior Cybersecurity Strategist at VMware Carbon Black
Greg Foss, Senior Cybersecurity Strategist at VMware Carbon Black

There’s no shortage of cyber threats facing retailers and shoppers this holiday season, as the volume and sophistication of cyberattacks surge with more consumers shopping online than ever before. Experts predicted that Cyber Monday 2020 was the biggest online shopping day in U.S. history with sales reaching an estimated $12.7 billion.

 

With this influx of online shopping, retailers are also seeing a rise in cyberattacks through methods like e-skimming and the targeting of point of sale (POS) systems. E-skimming is a sophisticated attack method where cybercriminals inject JavaScript into payment processing pages on retailers’ sites in an attempt to steal credit card information from unsuspecting customers. Additionally, our researchers at VMware Carbon Black have seen POS malware variants in use across a wide variety of retailers. These attacks rely on the physical swipes of cards, which then allow the malware to exfiltrate credit card data along with verification data such as PIN numbers or zip codes.

 

Cashing in on Holiday Hacking

These types of cyberattacks targeting the retail industry this holiday season have a very low barrier to entry. They are low-cost for attackers and include all of the necessary details, which cybercriminals can then sell on cybercrime forums. Recent VMware Carbon Black research into dark web forums found swiped credit card information being sold at the low cost of $10-20 per card. Similarly, PayPal accounts are selling for $2-10 each, depending on how much money is in the account. A loaded account comes at a higher price tag.

 

E-crimes Groups Continue to Grow

Making matters worse, today’s sophisticated attack groups are consistently extending their capabilities and tactics to infiltrate e-commerce applications and avoid detection, meaning these activities are occurring without retailers or consumers ever catching wind. A recent example of this is Magecart threat actors impersonating legitimate payment applications by way of homoglyph attacks, ultimately fooling victims into visiting malicious websites.

 

With these threats significantly increasing during the holiday season, we must all remain vigilant and employ best practices to stay secure when shopping online. Retailers should take the following steps:

  • Secure the integrity of both end-user and POS systems, and maintain the ability to monitor network activity for both preventative and forensic measures in the event of an attack.
  • Collect, aggregate, and alert on real-time process data from endpoints and POS systems alike, in addition to monitoring related infrastructure residing within the organization’s network.
  • One of the most effective measures for POS specifically is baselining behaviours across these systems and implementing a process to identify changes. This data can then be used to identify the deployment of malicious card-skimming POS malware, such as TinyPOS.
  • Ensure that all applications are up-to-date via patch management and vulnerability prioritization. Be sure to also conduct regular code integrity checks on public-facing e-commerce applications and implement web application firewalls as an added layer of defence.

 

We will continue to see bad actors target both eager shoppers and retailers this holiday season. With evolving tactics like e-skimming and POS attacks, cybercriminals have their sights set on not only the holiday season but continuing to cash in on online shopping. To stay one step ahead of attackers, retailers and consumers must take the necessary precautions to protect against threats, this will help ensure a happy holiday shopping season for all.

 

Additional Resources:

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