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Designing Active Directory DACL Backdoors

Andy Robbins, Will Schroeder

Using Active Directory DACL misconfigurations to achieve domain compromise and persistence.

Summary

Active Directory Security

Active Directory object discretionary access control lists (DACLs) represent an untapped offensive landscape, often overlooked by attackers and defenders. Control relationships between AD objects align with "attackers think in graphs" philosophy.

Control Edges

DACL analysis exposes previously unseen control edges, dramatically expanding paths to complete domain compromise. Attackers can identify numerous paths through careful DACL analysis.

Persistence Opportunity

DACL misconfigurations provide covert persistence deployment opportunities. Distinguishing intentional configurations from accidents is difficult, providing plausible deniability.

Forensic Analysis

Active Directory DACL backdoors have minimal forensic footprint and maximum plausible deniability. Understanding DACL-based control relationships and covert persistence techniques is critical for both offensive and defensive security.

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