Which of the following is NOT considered a commonly known attack vector?

The correct response highlights the distinction between attack vectors and other cybersecurity concepts. Ransomware, spear phishing, and session hijacking are all methods used by malicious actors to compromise systems, steal information, or disrupt services. These represent direct threats to security and are commonly recognized as attack vectors due to their widespread application in real-world attacks.

In contrast, white-hat hacking refers to ethical hackers who use their skills to help organizations identify and fix vulnerabilities instead of exploiting them. This practice is focused on securing systems and improving cybersecurity, rather than being an attack method. Therefore, unlike the other options, it is not considered an attack vector but rather a defensive measure within cybersecurity.