It is a Trojan backdoor.
In order to gain full access to the Internet, Surila registers itself in the Windows FirewallPolicy, thereby becoming a legal program with full Internet rights.
Installs a proxy server on a random port to process HTTP and SMTP traffic.
Attempts to contact with IRC servers to receive commands.
Also changes the hosts file in order to try and block antivirus database updates and access to antivirus vendors' websites.
Remove it from startup by antivirus (also check How To Remove section)Startup Optimizer.