Executive Decision Brief
Over 90% of ransomware intrusions in Malaysian enterprises terminate in complete Domain Admin takeover via Active Directory misconfigurations. This 26-page practitioner checklist consolidates Tier-0 hardening measures required to sever adversary attack paths, secure ADCS certificates, enforce PAW workstations, and eradicate legacy NTLM vulnerabilities.
Strategic Takeaways for Executive Leadership:
- Enforces strict Tier-0 / Tier-1 / Tier-2 administrative boundary segregation.
- Eliminates Kerberoasting and AS-REP roasting through Group Managed Service Accounts (gMSA) and AES encryption.
- Mitigates Active Directory Certificate Services (ADCS) privilege escalation vectors (ESC1 through ESC14).
- Restricts administrative credential exposure by deploying dedicated Privileged Access Workstations (PAWs).
Target Executive Audience:
Administrative Credential Exposure on Lower-Tier Workstations Is the Primary Path to Domain Takeover
Attackers rarely compromise Domain Controllers directly. Instead, an initial foothold on a Tier-2 user workstation exposes cached Domain Admin credentials via LSASS dumping, token impersonation, or NTLM relaying.
Implementing a strict three-tier administrative model ensures that Tier-0 credentials never touch, authenticate to, or leave memory artifacts on lower-tier servers or user endpoints.
| Exploitation Vector | Adversary Technique | Mandatory Hardening Action |
|---|---|---|
| Kerberoasting | Requesting TGS tickets for SPNs with weak RC4 passwords and cracking offline | Migrate service accounts to gMSA; enforce 30+ character AES-256 passwords |
| NTLM Relay / Coerce | Coercing authentication via PetitPotam/SpoolSample and relaying to LDAP/ADCS | Enforce LDAP Signing, LDAPS Channel Binding, and SMB Signing across all servers |
| ADCS Abuse (ESC1/ESC8) | Enrolling in misconfigured certificate templates allowing SAN client authentication | Audit certificate templates with Certify; remove CT_FLAG_ENROLLEE_SUPPLIES_SUBJECT |
| Unconstrained Delegation | Extracting cached TGTs from servers with unconstrained Kerberos delegation | Configure Constrained Delegation or Resource-Based Constrained Delegation (RBCD) |
| DCSync Rights | Replicating password hashes using DS-Replication-Get-Changes permissions | Audit and restrict Replicating Directory Changes permissions to Domain Controllers only |
Regulatory & Framework Mapping
Exact alignment of technical requirements to Bank Negara Malaysia, NACSA, and international standards.
| Framework & Clause | Mandatory Obligation | nCrypt Solution Capability | Audit Evidence Deliverable |
|---|---|---|---|
| BNM RMiTSection 10.23 - 10.27 | Privileged User Access and Identity Management Controls | Active Directory Security Assessment & BloodHound Path Audit | Tier-0 Identity Hardening Audit & Attack Path Remediation Plan |
RFP Scoping & Vendor Due Diligence Checklist
Criteria for technical evaluation committees assessing external cybersecurity service providers in Malaysia.
Assessment Depth
Executive & Technical Questions
What is the single most urgent step in Active Directory hardening?
Enforcing LDAP signing and channel binding across all Domain Controllers while restricting Domain Admin accounts from logging into any Tier-1 server or Tier-2 workstation.
Disclaimer: This whitepaper is published for strategic decision-support and technical guidance. It does not constitute formal legal counsel. Malaysian enterprises should validate specific statutory interpretations with qualified counsel.
Accreditation Context: nCrypt uses CREST-aligned methodologies and deploys certified practitioners (OSCP, CRTO, CISA, CISSP). NACSA Cybersecurity Service Provider (CSP) license application submitted; ISO/IEC 27001 audit in progress.