During a recent security breach at STU Corporation, attackers successfully infiltrated the network using two distinct strategies. First, they tricked employees into downloading a seemingly legitimate software update that actually contained a virus. They also called employees posing as IT support staff to acquire their login credentials. Which two cyberattack techniques best describe the attackers$$ methods?

Phishing and malware.

Ransomware and denial of service $($DoS$).$

Malware and social engineering.

Distributed denial of service $($DDoS$)$ and spear phishing.

Phishing and malware.

Ransomware and denial of service $($DoS$).$

Malware and social engineering.

Distributed denial of service $($DDoS$)$ and spear phishing.