What is a commonly used method for delivering malware?

Phishing emails with malicious attachments are a widely recognized method for delivering malware because they exploit human psychology. Attackers craft emails that appear to be from legitimate sources, enticing recipients to open attachments or click on links that install malware on their devices. This method is particularly effective as it leverages social engineering tactics to mislead users, leading them to believe they are taking a safe action.

This technique is effective because even users who might be aware of security best practices can be caught off guard by seemingly genuine communications, especially during high-stress situations or when urgency is implied in the message. Once the malware is executed, it can compromise the user's system, steal sensitive data, or spread to other devices.

Other methods of delivering malware, such as physical theft of devices, while possible, are much less scalable and rely on direct access to hardware. Two-factor authentication is a security measure designed to enhance protection against unauthorized access and does not facilitate the delivery of malware. Data encryption techniques are also focused on securing information rather than being involved in how malware is disseminated. Thus, phishing emails represent a prevalent and efficient avenue for attackers to deliver malicious software.