Troj/SdBot-FB is an IRC backdoor Trojan which allows unauthorised access and control of the computer via IRC channels. In order to run automatically when Windows starts up the Trojan copies itself to the the file sysconf16.exe in the Windows system folder and adds the following registry entries:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\ConfLoader
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\ConfLoader