Final answer:
The attacker is performing a password-spraying attack, trying a small number of commonly used passwords against many different accounts.
Step-by-step explanation:
The attacker is performing a password spraying attack. This type of attack involves trying a small number of commonly used passwords against a large number of user accounts. It is different from a brute-force attack, which involves systematically trying every possible combination of characters until the correct password is found. In a password spraying attack, the attacker is not attempting to guess a specific user's password, but rather trying a few common passwords against many different accounts to increase the chances of a successful login.