November 20, 2017 By Larry Loeb 2 min read

Security researchers discovered more than 32,000 fraudulent Black Friday apps in the wild, many of which use the branding of the top five U.S. online retailers to spread malware and steal customer credentials.

According to RiskIQ’s “2017 Black Friday E-Commerce Blacklist,” which was derived from a data set of 2 billion daily HTTP requests, 20 million mobile apps, 300 million domain records and 783 locations across more than 100 countries, about 1 in 25 Black Friday apps available in global app stores are malicious. Researchers also discovered at least 15 fraudulent apps that use the branding of the top five online retail companies to dupe users into divulging their sensitive data.

App Store Security Is Not Bulletproof

Black Friday is a huge day for e-commerce. According to the RiskIQ report, in 2016 154 million consumers did their Black Friday shopping online, spending $5.27 billion, which represented a 17.7 percent increase year over year. Mobile revenue alone totaled $1.2 billion, representing a growth rate of 33 percent year over year. Overall, nearly 40 percent of sales occurred on a mobile device during last year’s Black Friday weekend.

The report found that even some of the most popular app stores featured malicious Black Friday apps. The Google Play store hosted the largest number of fraudulent apps, while Apple’s App Store contained 85 legitimate apps that had been infected with malware despite rigorous security testing. The report pointed out that although most official mobile app stores have relatively strong verification processes in place, these systems are “not bulletproof.”

While the volume of blacklisted apps declined by 40 percent from Q1 to Q2 2017, suggesting a global boost in security awareness, these apps still put less savvy online shoppers and retailers at risk of fraud during the holiday shopping season.

Avoiding Fishy Black Friday Apps

To mitigate the risks from these malicious apps, RiskIQ advised users to avoid downloading applications that request questionable permissions to access data such as contact lists, text messages, administrative features, stored passwords and credit card information. Users should also be wary of app developers who use free email services such as Gmail.

The most obvious and important takeaway from the report is that consumers must be particularly proactive about their online security during the bustling holiday season.

More from

Hive0137 and AI-supplemented malware distribution

12 min read - IBM X-Force tracks dozens of threat actor groups. One group in particular, tracked by X-Force as Hive0137, has been a highly active malware distributor since at least October 2023. Nominated by X-Force as having the “Most Complex Infection Chain” in a campaign in 2023, Hive0137 campaigns deliver DarkGate, NetSupport, T34-Loader and Pikabot malware payloads, some of which are likely used for initial access in ransomware attacks. The crypters used in the infection chains also suggest a close relationship with former…

Unveiling the latest banking trojan threats in LATAM

9 min read - This post was made possible through the research contributions of Amir Gendler.In our most recent research in the Latin American (LATAM) region, we at IBM Security Lab have observed a surge in campaigns linked with malicious Chrome extensions. These campaigns primarily target Latin America, with a particular emphasis on its financial institutions.In this blog post, we’ll shed light on the group responsible for disseminating this campaign. We’ll delve into the method of web injects and Man in the Browser, and…

Crisis communication: What NOT to do

4 min read - Read the 1st blog in this series, Cybersecurity crisis communication: What to doWhen an organization experiences a cyberattack, tensions are high, customers are concerned and the business is typically not operating at full capacity. Every move you make at this point makes a difference to your company’s future, and even a seemingly small mistake can cause permanent reputational damage.Because of the stress and many moving parts that are involved, businesses often fall short when it comes to communication in a crisis.…

Topic updates

Get email updates and stay ahead of the latest threats to the security landscape, thought leadership and research.
Subscribe today