Eccouncil Exam ECSS Topic 6 Question 66 Discussion

Johnson is a professional hacker who targeted an organization's customers and decided to crack their system passwords. In this process, he found a list of valid customers, created a list of possible passwords, ranked the passwords from high to low probability, and started keying in each password in the target system until the correct password is discovered.

Identify the type of attack performed by Johnson in the above scenario.