Yesterday MSE detected an infection of Sirefef.b and Sirefef.y in one of our administrators folders. Services.exe seems to be infected, and MSE crashes the server every time it tries to clean the files (probably because it's trying to quarantine and delete important system files). Ran MBAM, which attempted to clean infection, but did not seem to help. Ran FRST to confirm infection, which showed ZeroAccess. GMER did not find anything, nor TDSSKiller. DDS will not run on Windows Server 2008. Logs to be posted.