What is the difference between program threats and system threats?

Program threats:

Operating system's processes and kernel do the designated task as instructed. If a user program

made these process do malicious tasks then it is known as Program Threats. One of the

common examples of program threat is a program installed in a computer which can store and

send user credentials via network to some hacker

example : Virus

System threats:

System threats refer to misuse of system services and network connections to put user in

trouble. System threats can be used to launch program threats on a complete network called as

program attack. System threats create such an environment that operating system resources/

user files are mis-used.

example : worms