A social engineering technique whereby attackers under disguise of legitimate request attempt to gain access to confidential information they shouldn't have access to is commonly referred to as: Phishing
Phishing is a type of social engineering in which an attacker sends a bogus (e.g., spoofed, misleading, or other deceptive) message meant to convince a person to grant the attacker access to private information or to install risky software, like ransomware, on the victim's infrastructure. Phishing attacks are becoming increasingly complex, and many of them visibly replicate the target website, enabling the attacker to monitor everything the victim does there and to get past any additional security measures with them.
According to the FBI's Internet Crime Complaint Centre, which records more occurrences of phishing than all other types of computer crime combined, phishing will be by far the most common attack carried out by hackers as of 2020.
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