An administrator learns that users are receiving large quantities of unsolicited messages. The administrator checks the content filter and sees hundreds of messages sent to multiple users. Which of the following best describes this kind of attack?

A watering hole attack targets specific groups by compromising websites they are known to visit, thus infecting users when they access those sites. This differs from the scenario described, where unsolicited messages are directly sent to users rather than exploiting compromised websites to lure victims.

Typosquatting involves registering domain names that are intentionally misspelled versions of popular websites, aiming to capture users who mistype URLs. While it can lead to phishing attempts, the scenario presented highlights the receipt of unsolicited messages rather than the manipulation of domain names.

Business email compromise (BEC) refers to a type of scam where attackers impersonate a trusted source to fraudulently request funds or sensitive information. Although it involves deceptive practices, the situation described focuses on unsolicited messages sent to users, which is more characteristic of phishing rather than targeted BEC schemes.