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Turning Your Active Directory into the Attacker’s C2

Quentin RolandWilfried Bécard

Demonstrates how red teams can weaponize Active Directory Group Policy Objects (GPOs) into a stealthy, native command-and-control infrastructure.

Summary

Active Directory as Centralized Infrastructure

Active Directory (AD) is designed to coordinate and manage enterprise computers, users, and security settings across distributed corporate networks.

Weaponizing Group Policy Objects for C2

Quentin Roland and Wilfried Bécard show how attackers who obtain GPO modification rights can repurpose Group Policy replication into a covert command-and-control mechanism that requires no external network connections.

Persistence and Privilege Escalation Across Network Segments

By embedding scheduled tasks, script execution policies, and immediate task items within replicated GPO templates, operators distribute commands to thousands of domain-joined systems simultaneously.

Detecting Malicious GPO Manipulation

Defending Active Directory against GPO weaponization requires monitoring directory replication logs, enforcing tiered administration models, and auditing GPO permissions.

Related talks

Main Stage·21 min

  • DEF CON
  • Red Team
  • Date: Aug 2025
  • Location: Las Vegas

Antoine Goichot

Discloses subtle logic and authorization bypasses in Microsoft Windows Local Administrator Password Solution (LAPS) that enable credential theft.

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