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Question 152

Which of the following files would grow to a large size as a result of a brute force attack?

    Correct Answer: A

    The file 'btmp' records information about failed login attempts. During a brute force attack, an attacker makes numerous unsuccessful login attempts, trying various username and password combinations. Consequently, the 'btmp' file will grow significantly in size as it logs each failed attempt.

Discussion
Vikt0rOption: A

utmp: Records information about currently logged-in users. It's a smaller file that keeps track of who is currently on the system. wtmp: Records information about login and logout events. It is a larger file that logs historical information about user logins and logouts. btmp: Records information about failed login attempts. This file can grow significantly in size during a brute force attack where an attacker repeatedly attempts to log in with various username and password combinations.