This process is a network worm and a backdoor Trojan. It spreads using a range of methods that include the utilization of weak passwords on computers and operating system vulnerabilities. It also can be instructed by a remote user to perform the remote functions.
Non-system processes like crmss.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues