Please don't correct me - especially when you don't know what you are talking about.
In addition to being a normal windows file, lsass.exe also can be 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)