AD-GMC-03: Member account types breakdown should be retrievable
| ID | AD-GMC-03 |
| Severity | Info |
| Suite | Active Directory (on-premises) |
| Product | Active Directory |
| Feature | Groups |
| Security area | Identity lifecycle and hygiene |
| Resource type | Group |
| Reads from | On-premises Active Directory |
What this checks and how to fix it
Section titled “What this checks and how to fix it”A detailed breakdown of account types across group membership provides comprehensive visibility:
- User Accounts: Most common members - represent individual access
- Group Nesting: Groups within groups create hierarchical permissions
- Computer Accounts: Service accounts and system access requirements
- Foreign Security Principals: Cross-domain and cross-forest access
Control Type
Section titled “Control Type”Operational
Security Recommendation
Section titled “Security Recommendation”Review account type distributions to identify:
- Over-reliance on group nesting that may create privilege escalation paths
- Unusual patterns (e.g., many computer accounts in privileged groups)
- External principals that may need periodic trust validation
How the Test Works
Section titled “How the Test Works”This test provides a detailed analysis of group membership composition:
- Categorizes all unique members by their object class
- Shows count and percentage for each account type
- Identifies the distribution of member types across groups
For performance reasons, the test analyzes members from the first 50 groups and deduplicates by SID.
Related Tests
Section titled “Related Tests”Test-MtAdGroupMemberAccountTypeCount- Count of distinct account typesTest-MtAdGroupMemberTrustDetails- Detailed view of trust members by group
Mito check. Author: soulemike. Open-source licences.
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