Crossword

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Across
  1. 2. is a virus that restricts access to your computer system and demands a ransom
  2. 3. detects the changes that the virus causes in the computer
  3. 7. virus designed in such a way that it looks like an antivirus software
  4. 8. is the first PC virus
  5. 10. It is very dangerous virus but comes as a friendly program
Down
  1. 1. is the destructive event the program is intended to deliver
  2. 4. a virus that is placed on a computer or mobile device without user's knowledge that collects all the information
  3. 5. It is a technique used by antivirus programs for detecting viruses
  4. 6. It is an e-mail message that warns users of a non-existent virus or other malware
  5. 9. This virus spread by the files attached to e-mail messages