CRTeamer Exam Prep & Study Resources

CRTE (Certified Red Team Expert) is Altered Security's advanced Active Directory red team certification, positioned as the expert-level follow-on to CRTP. It focuses on attacking complex multi-domain and multi-forest Active Directory environments, exploiting forest trust relationships, abusing Active Directory Certificate Services, and implementing advanced persistence mechanisms that survive detection and remediation attempts. CRTE is designed for experienced red teamers and senior penetration testers who already have solid single-domain AD attack skills from CRTP or equivalent experience.

CRTE is significantly harder than CRTP. While CRTP focuses on single-domain Active Directory attacks with relatively straightforward attack chains, CRTE involves attacking multi-domain environments with complex forest trust configurations, subtle cross-trust misconfigurations, and scenarios where standard attack tools may be partially blocked. Successfully compromising the CRTE environment requires not just executing known techniques but understanding their underlying mechanics well enough to adapt when controls or configurations prevent the expected approach.

CRTE covers advanced enterprise Active Directory attack topics including forest trust exploitation and cross-forest attack techniques, domain trust abuse across complex trust configurations, Active Directory Certificate Services (ADCS) attacks including ESC1 through ESC8 scenarios, Shadow Credentials attacks using certificate-based authentication, Azure Active Directory integration attack paths, advanced Kerberos attacks including constrained delegation abuse in multi-domain environments, and stealthy persistence mechanisms designed to survive incident response activities.

Completion of CRTP or equivalent hands-on Active Directory attack experience is the strongly recommended prerequisite for CRTE. You should be fully comfortable executing standard single-domain AD attacks, Kerberoasting, DCSync, Golden Tickets, ACL abuse, before beginning CRTE content. Strong understanding of Kerberos protocol mechanics, Windows authentication flows, and how Active Directory trusts work is necessary to understand the more complex multi-domain attack scenarios. Familiarity with BloodHound, Impacket, Rubeus, and Certify is expected.

Yes for experienced red teamers, senior penetration testers, and offensive security professionals who specialize in enterprise Active Directory environments. CRTE demonstrates advanced capability to attack complex, hardened AD environments, skills that are directly applicable in sophisticated red team operations and high-end penetration testing engagements against mature enterprise clients. As organizations increasingly deploy multi-forest configurations, ADCS, and Azure AD hybrid environments, the attack techniques covered by CRTE become increasingly relevant to real-world engagements.