Troj/Dropper-AA is a dropper Trojan.
Troj/Dropper-AA will drop SYSW.DLL into the Windows folder and run it.
In order to run the dropped file automatically each time Windows starts, Troj/Dropper-AA will set the following registry entries:
HKCR\CLSID\(RND-CLSID)\InProcServer32
(default)
sysw.dll
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ ShellServiceObjectDelayLoad
System
(RND-CLSID)
where (RND-CLSID) is a randomly generated GUID.
A sample of Troj/Dropper-AA is known to drop Troj/LdPinch-AO.