After working on his doctoral dissertation for two years, Joe, a user, is unable to open his
dissertation file. The screen shows a warning that the dissertation file is corrupted because it is
infected with a backdoor, and can only be recovered by upgrading the antivirus software from the
free version to the commercial version. Which of the following types of malware is the laptop
MOST likely infected with?
A.
Ransomware
B.
Trojan
C.
Backdoor
D.
Armored virus