Troj/Agobot-A is a backdoor Trojan which runs in the background as a system process and allows unauthorised remote access to the computer.
Troj/Agobot-A copies itself to the Windows system folder as SYSLDR32.EXE and adds entries to the registry at
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
and
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
to run itself on system restart.