Troj/Padodor-Y is a multi-component proxy Trojan which allows unauthorised remote access to the computer via a network.
The main dropper component the file boot.sys in the root folder and a randomly-named DLL in the Windows system folder. Boot.sys drops another randomly-named DLL in the Windows system folder and the legitimate network driver ndisrd.sys in the <Windows system folder>\drivers folder.
One of the DLL components contains the proxy Trojan functionality which it attempts to inject into the explorer process.