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Determine SID's for account domain and primary domain from kernel mode

Bill_ZissimopoulosBill_Zissimopoulos Member Posts: 113

I have a need to determine the SID's for the account domain (PolicyAccountDomainInformation) and primary domain (PolicyDnsDomainInformation) in an FSD. I understand that this information lives inside the user-mode LSA service. In user mode it is straightforward to get this information by using the LsaQueryInformationPolicy API. In kernel mode there is no direct equivalent; the SecLookup* exports from ksecdd provide limited access to the LSA.

I am considering the following 2 solutions:

  • Pass the information to the FSD from a user mode process. Unfortunately this is not easily feasible for all of the scenarios that I wish to enable. Ideally I would like to have a kernel-mode solution.
  • Access the information that I need directly from the registry:
HKEY_LOCAL_MACHINE\SECURITY\Policy\PolAcDmS - SID for PolicyAccountDomainInformation
HKEY_LOCAL_MACHINE\SECURITY\Policy\PolPrDmS - SID for PolicyDnsDomainInformation

Does anyone have any better suggestions?

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