Symantec Security Response has developed a removal tool to clean the infections of the following W32.Sober variants:
W32.Sober@mm
W32.Sober.B@mm
W32.Sober.C@mm
W32.Sober.D@mm
W32.Sober@mm.enc
W32.Sober.gen
W32.Sober.E@mm
W32.Sober.F@mm
W32.Sober.G@mm
W32.Sober.I@mm
W32.Sober.L@mm
W32.Sober.N@mm
W32.Sober.O@mm
W32.Sober.Q@mm
W32.Sober.V@mm
W32.Sober.W@mm
W32.Sober.X@mm

Note: W32.Sober.gen is a generic detection that detects variants of W32.Sober. If your computer is detected as infected with W32.Sober.gen, download and run the tool. In most cases, the tool will be able to remove the infection.