Answer:
Cyber criminal is a attacker or the hacker who tends to hack and steal the personal and confidential information present in the computer systems.The hacking process is carried out by the means of installing the malware in the authorized system,manipulation of the system function,etc.
The cyber crime is executed by the hackers with the help of the knowledge about the operating system and hacking techniques. Attacking the system is done by them so that they can have the confidential information, personal information or data that is not to be share or accessed by anyone except for the authorized user.
The hacked data can be manipulated such as eliminating data containing evidence, leaked by sharing confidential data with wrong sources etc by the hacker for their own purpose or other reasons.