How to prevent quishing attacks

Quishing attacks use QR codes to trick users into visiting malicious websites. As QR codes become more widespread, the potential for quishing attacks has grown. By leveraging the trust and convenience associated with QR codes, cybercriminals can execute sophisticated phishing schemes that deceive even the most cautious individuals. However, with the right knowledge and precautions, we can effectively mitigate the risks posed by these attacks.

What is quishing?

Quishing, also known as QR code phishing, is a phishing technique that uses QR codes to trick potential victims. Just like other types of phishing attacks, the purpose is to steal sensitive information, install malware on your device, or make you visit a website.

According to Intelligent CIO, quishing attacks have increased from 0.8% in 2021 to 10.8% in 2024 with 2023 having the highest number of attacks at 12.4%.

Recognizing and avoiding quishing attacks

Preventing quishing attacks requires awareness, caution, and security tools. Here are detailed steps to help you recognize and avoid these attacks:

• Be cautious with QR codes in unsolicited messages: If you receive an unsolicited email or text message containing a QR code, treat it with suspicion. Even if the message appears to be from a known source, verify its legitimacy through other means before scanning the code.
• Verify the source: Only scan QR codes from trusted sources. For instance, if you receive a QR code claiming to be from your bank, visit the bank’s official website or contact them directly to verify its authenticity.
• Check URL previews: Use QR code scanning apps that show the URL before opening it. This allows you to inspect the link and determine if it looks suspicious. Many modern smartphones have built-in QR code scanners that provide this functionality.
• Use trusted QR code scanning apps: Some mobile operating systems and security apps provide built-in QR code scanning with safety features. Ensure your scanning app is from a reputable developer and keep it updated to protect against new threats.
• Look for HTTPS: Ensure the URL starts with "https://", indicating the site is secured with SSL or TLS encryption. Although not foolproof, it’s a basic security measure that helps protect your data during transmission.
• Stay informed about phishing techniques: Stay updated on common phishing tactics, including quishing. Awareness can significantly reduce the risk of falling for these scams. Many organizations offer cybersecurity awareness training to help employees recognize and avoid phishing attacks.
• Report suspicious QR codes: If you encounter a suspicious QR code, report it to the relevant authorities or the company being impersonated. This can help prevent others from falling victim to the same scam.
• Keep your devices secure: Use up-to-date antivirus and anti-malware software on your devices., which can detect and block malicious sites and downloads initiated through QR codes.
• Avoid sharing sensitive data: Do not enter personal, financial, or login information on websites accessed via QR codes unless you are certain of their legitimacy. Be particularly cautious if the site requests sensitive information unexpectedly.

Enhancing organizational security against quishing

For organizations, preventing quishing attacks requires a proactive approach to cybersecurity. Here are some strategies to enhance organizational security:

• Regular training: Conduct regular security awareness training for employees to help them recognize and respond to phishing and quishing attacks. Use real-world examples and simulations to reinforce learning.
• Establish clear policies and procedures: Develop and enforce clear policies and procedures for handling QR codes and other potential security threats. Ensure employees know how to report suspicious activity and what steps to take if they encounter a threat.
• Use advanced security tools: Deploy advanced security tools, such as endpoint protection, email filtering, and intrusion detection systems, to help identify and block malicious activity. Consider using tools that specifically analyze and block malicious QR codes.
• Monitor and respond to threats: Establish an incident response plan to quickly address any security breaches or attempted quishing attacks. Regularly monitor for signs of phishing activity and respond promptly to mitigate potential damage.
• Collaborate with external partners: Collaborate with external partners, such as cybersecurity firms and industry groups, to share threat intelligence and stay informed about emerging threats. This can help your organization stay ahead of cybercriminals.

See also: HIPAA Compliant Email: The Definitive Guide

FAQs

How does quishing compare to traditional phishing?

Quishing is a variation of traditional phishing that uses QR codes instead of links in emails or messages. Both aim to deceive individuals into visiting malicious websites or providing sensitive information, but quishing exploits the convenience and trust associated with QR codes.

Learn more: What is a phishing attack?

Can a secure (HTTPS) site still be malicious?

Yes, while HTTPS indicates the site is secured with encryption, it does not guarantee the site is safe. Cybercriminals can obtain SSL/TLS certificates for their malicious sites. Always verify the legitimacy of the site beyond just checking for HTTPS.

See also: Understanding HTTPS

What should I do if I realize I've scanned a malicious QR code?

If you realize you've scanned a malicious QR code, immediately disconnect from the internet to prevent further harm. Run a full antivirus scan on your device, change any compromised passwords, and monitor your accounts for suspicious activity.