Answer: Session Hijacking
Step-by-step explanation:Session hijacking is the attacking activity that threats the valid session of the computer. This attack also invokes the system with unauthorized access for hacking the information and other processes.
Other options are incorrect because crpto-malware is the ransomware that demands ransom for data encrypted by the hackers, rootkit permits the authorized access in system without getting noticed and logic bomb is a malicious code to harm the program computing. Thus, the correct option is session hijacking.