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QR codes: a little-known cyberthreat

Since the covid-19 pandemic, which required organizations to adapt in record time, QR codes have reappeared in large numbers; restaurant menus, wifi access, information in organizations or airports, app downloads. Convenient and fast, QR codes enable us to access information, websites and services with a simple scan of our smartphones.

However, like any technological innovation, QR codes are not immune to misuse. In recent years, cybercriminals have found ways to exploit QR codes, turning these seemingly innocuous tools into powerful cybersecurity threats.

The convenience and vulnerability of QR codes

As mentioned above, QR codes are highly convenient, enabling users to access information instantly without having to type in a URL. A simple capture of the pixelated square with their mobile devices can lead users to websites, applications, payment gateways, Wi-Fi networks and more. However, this simplicity also presents a cybersecurity challenge. Cybercriminals have exploited this convenience to launch phishing attacks, distribute malware and steal sensitive data.

Phishing attacks via QR codes

One of the most significant threats associated with QR codes is their potential use in phishing attacks. Cybercriminals can create malicious QR codes which, when scanned, take users to fake websites designed to imitate legitimate ones. Unsuspecting users may enter their credentials, personal information or financial data, unknowingly handing it over to the attackers. These fake websites can be used for a variety of malicious purposes, from stealing login credentials to spreading malware.

Malware injection

QR codes have also been used to distribute malware. By embedding malicious links in QR codes, attackers can trigger the download and installation of malware on a user's device. Once infected, the malware can allow attackers unauthorized access to the device, compromising personal data and sensitive information. This technique has been used to spread ransomware, spyware and other types of malware.

Une personne qui scan un code QR malveillant

Tips for mitigating cybersecurity risks associated with QR codes

Be careful when scanning: Only scan QR codes from reliable sources. If you receive an unsolicited QR code, be careful before scanning it. Just because it's a restaurant menu or a display in your organization doesn't mean it's legitimate and safe. Cyber criminals may also have imitated the QR code display to replace the legitimate document (menu, poster ...) with one containing a malicious QR code.

Inspect URLs: Before scanning a QR code, manually check the URL to make sure it corresponds to the official website or source. Beware of misspelled URLs or unknown domains.

Use a QR code scanner app: Consider using a reputable QR code scanner app that can help you identify malicious QR codes and warn you of potential risks, not your phone's camera.

Regular software updates: Keep your smartphone's operating system and applications up to date. Software updates often include security patches that can help protect against potential vulnerabilities.

Avoid Wi-Fi QR codes: Be careful when scanning QR codes to connect to Wi-Fi networks. Hackers can create malicious QR codes that lead to fake Wi-Fi networks, which can compromise the security of your device.

While QR codes are incredibly convenient and effective, they also open the door to a variety of cybersecurity risks. It's essential that users remain vigilant, exercise caution when scanning QR codes, and adopt best practices to mitigate potential threats. By understanding the risks associated with QR codes and taking proactive measures, individuals can enjoy the benefits of this technology without falling victim to cybercriminal activity.


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