Answers
Replicates with no user action needed
Appears to be a normal application
Encrypts files and demands money
Can flood a network with copies
Used to carry out denial-of-service attacks
Sends personal data to others
Does not need a host file
Disguised as legitimate software
Hides itself and other malware
Locks users out of their own files
Named after the wooden horse myth
WannaCry attack on the NHS in 2017
User is tricked into installing it
Gives an attacker administrator-level control
Difficult to find and remove
Standalone program that spreads by itself
Owners are unaware they are involved
Infected computers controlled by one attacker
Often demands payment in cryptocurrency
Thousands of devices can be involved
Hides its presence from virus scanners
Monitors browsing without the user knowing
Tracks activity and reports it back
Secretly records keystrokes and passwords