What is it?
Worm.Win32.Raleka service.exe

What does it do?
Raleka is a worm-virus that spreads through the Internet by exploiting a vulnerability in the DCOM RPC service in Microsoft Windows. This vulnerability is detailed in Microsoft Security Bulletin MSO3-026 .

The infected file is approx. 14KB in size when packed by UPX.

Removal:
VirusList has the full dirt (HERE)