Process File: lsass or lsass.exe Process Name: Local Security Authority Service
Description: lsass.exe is a system process of the Microsoft Windows security mechanisms. It specifically deals with local security and login policies. Note: lsass.exe also relates to the Windang.worm, irc.ratsou.b, Webus.B, MyDoom.L, Randex.AR, Nimos.worm which spread via floppy disk drives, mass-mailing and peer-to-peer sharing. Please review file path for clarification of this.
Have now found more info. As your AV doesn't show it check windows folder for aserve.exe or aserve2.exe if there go to securityresponse.symantec.com/avcenter/venc/data/w32.sasser.removal.tool.html . After that is done go to click here .Download & apply patch.