Malware - Crossword

Clues

1. Software written to harm a computer, its data or its user (7)
2. Attaches itself to a file or program and spreads when infected files are opened (5)
3. Spreads across a network by itself, with no action needed by the user (4)
4. Malware disguised as a useful program so the user chooses to install it (6)
5. Encrypts files so they cannot be opened and demands payment to unlock them (10)
6. Secretly monitors and records what a user does on a computer (7)
7. Records every key pressed so passwords and card numbers can be captured (9)
8. A file sent with an email that can install malware when it is opened (10)
9. Removable storage device that can carry malware from one computer to another (8)