Convert lsass dump from a vmem memory snapshot to dmp

[5433D-R32433]

I get memdump and procdump from lsass in a vmem snapshot file( I have snapshot and suspend files of vmware virtual machines: vmsn, vmss, vmem ). but I can not open it with windbg or mimikatz. I tried to convert the raw memory dump to dmp with volatility but it failed( through raw2dmp and through a couple of other tools ).
what's the format of memdump files and how we can convert them to Windows dump format. as I know the procdump command get the PE file of the executable process from memory. how can we convert them to dmp.

thanks