From Hackathon Newbies to Podium Finishers: The Cybersecurity Blueprint They Used to Dominate

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Introduction:

A team of self-proclaimed beginners, “TARS,” recently secured 3rd place in their first-ever IEEE CIS-sponsored hackathon, demonstrating that a strategic approach to cybersecurity fundamentals can overcome a lack of experience. Their journey from zero to a podium finish underscores the critical importance of mastering core security principles, tools, and commands in a high-pressure environment. This article deconstructs the essential technical toolkit that likely powered their success, providing a verified command list and step-by-step guides for aspiring security professionals.

Learning Objectives:

  • Master fundamental Linux and Windows commands for system reconnaissance and vulnerability assessment.
  • Understand the application of essential cybersecurity tools for network analysis and exploitation.
  • Learn to implement basic hardening techniques and secure coding practices to defend against common attacks.

You Should Know:

1. Network Reconnaissance with Nmap

Nmap is the industry-standard tool for network discovery and security auditing. It is often the first command run in any penetration test or security assessment to map the attack surface.

`nmap -sS -sV -O -p- 192.168.1.1/24`

`nmap –script vuln 10.0.0.5`

`nmap -A -T4 target.com`

Step-by-step guide:

  1. Install Nmap: On Linux (sudo apt-get install nmap) or Windows (download from nmap.org).
  2. Basic Scan: Start with nmap -sS <target_ip>. The `-sS` flag initiates a SYN stealth scan, which is less intrusive and often undetected by basic firewalls.
  3. Service Detection: Use `-sV` to probe open ports and determine the service/version information running on them. This helps identify potentially vulnerable software.
  4. Full Port Scan: The `-p-` flag tells Nmap to scan all 65,535 ports, not just the common ones, uncovering hidden services.
  5. OS Fingerprinting: The `-O` flag attempts to identify the target’s operating system.
  6. Vulnerability Scripting: Utilize Nmap’s powerful scripting engine with `–script vuln` to check for known vulnerabilities against the discovered services.

2. Web Vulnerability Assessment with OWASP ZAP

The OWASP Zed Attack Proxy (ZAP) is an open-source web application security scanner, perfect for beginners to find vulnerabilities like SQL injection and Cross-Site Scripting (XSS).

docker run -v $(pwd):/zap/wrk/:rw -t owasp/zap2docker-stable zap-baseline.py -t https://www.example.com`
`zap-cli quick-scan --self-contained --start-options '-config api.disablekey=true' http://localhost`

Step-by-step guide:

1. Download and Run ZAP: Available for all major OSes from the OWASP website.
2. Set Scope: In the ZAP desktop application, enter the URL of your target web application in the "Quick Start" tab and click "Attack."
3. Spider the Site: Allow ZAP to automatically crawl the application to discover all accessible pages and endpoints.
4. Active Scan: Once spidering is complete, launch an "Active Scan." ZAP will automatically attack the application with a barrage of known attack vectors.
5. Review Alerts: The "Alerts" tab will display a list of found vulnerabilities, categorized by risk (High, Medium, Low, Informational), complete with a description and potential solution.

3. Password Cracking and Hash Analysis with John the Ripper
Understanding how attackers crack passwords is crucial for building strong authentication systems. John the Ripper is a fast password cracker.

`john --format=raw-md5 hashes.txt

`john –wordlist=/usr/share/wordlists/rockyou.txt hashes.txt`

`john –rules –wordlist=passwords.txt hashes.txt`

Step-by-step guide:

  1. Obtain Hashes: First, you need a file containing password hashes (e.g., from a compromised `/etc/shadow` file on Linux).
  2. Identify Hash Type: Use a tool like `hashid` to determine the hash algorithm (e.g., MD5, SHA-256, bcrypt).
  3. Wordlist Attack: The most common method. Use john --wordlist=<wordlist_file> <hash_file>. The `rockyou.txt` wordlist is a standard starting point.
  4. Specify Format: If John doesn’t auto-detect the format, specify it with --format=<format_name>.
  5. Review Results: Once cracked, view the passwords with john --show <hash_file>. This demonstrates the critical weakness of simple or common passwords.

4. Firewall and Network Hardening with Windows Firewall

Securing a Windows host is a fundamental skill. The built-in Windows Firewall with Advanced Security is a powerful tool for controlling inbound and outbound traffic.

`netsh advfirewall set allprofiles state on`

`netsh advfirewall firewall add rule name=”Block Port 445″ dir=in action=block protocol=TCP localport=445`
`Get-NetFirewallRule | Where-Object {$_.Enabled -eq “True”} | Format-Table Name, DisplayName, Direction, Action`

Step-by-step guide:

  1. Open Command Prompt as Administrator: This is required to modify firewall settings.
  2. Enable the Firewall: Ensure the firewall is on for all profiles (Domain, Private, Public) using the `netsh` command above.
  3. Create a Block Rule: To block a known malicious port (e.g., SMB port 445, often used in worm propagation), use the `netsh advfirewall firewall add rule` command.
  4. Verify Rules: In PowerShell, use the `Get-NetFirewallRule` cmdlet to list all active rules and verify your configuration.
  5. Create Allow Rules: Be restrictive. Only allow necessary services. For example, to allow a custom web app on port 8080: netsh advfirewall firewall add rule name="Allow MyApp" dir=in action=allow protocol=TCP localport=8080.

5. Secure Shell (SSH) Hardening

SSH is a primary vector for unauthorized access if not configured correctly. Hardening the SSH service is a critical step in securing any Linux server.

`sudo nano /etc/ssh/sshd_config`

`sudo systemctl restart ssh`

`ssh-keygen -t ed25519 -a 100`

Step-by-step guide:

  1. Edit the SSHD Config File: Open the configuration file in a text editor like `nano` or vim.
  2. Disable Password Authentication: Find the line PasswordAuthentication yes, uncomment it, and change it to PasswordAuthentication no. This forces the use of key-based authentication, which is far more secure.
  3. Disable Root Login: Change `PermitRootLogin yes` to `PermitRootLogin no` to prevent direct root logins.
  4. Change Default Port: Modify `Port 22` to a non-standard port (e.g., Port 2222) to reduce noise from automated bots.
  5. Generate an SSH Key Pair: On your client machine, run `ssh-keygen -t ed25519` to create a new, strong key pair. Copy the public key (id_ed25519.pub) to the server’s `~/.ssh/authorized_keys` file.
  6. Restart the Service: Apply the changes with sudo systemctl restart ssh. Test your key-based login before closing your current session.

6. API Security Testing with curl

APIs are the backbone of modern applications and a prime target. The `curl` command is invaluable for manually testing API endpoints for common flaws.

`curl -X GET https://api.example.com/v1/users`
`curl -X POST -H “Content-Type: application/json” -d ‘{“user”:”admin”,”password”:”password”}’ https://api.example.com/login`
`curl -H “Authorization: Bearer ” https://api.example.com/admin`

Step-by-step guide:

  1. Test for Information Disclosure: Use a simple `GET` request to an API endpoint. Check if the response reveals sensitive information like user details, server versions, or system paths.
  2. Test Authentication: Send a `POST` request to the login endpoint with common credentials. Observe the response for differences between valid and invalid logins that could allow username enumeration.
  3. Test Authorization (Broken Object Level Control): If you have access to a resource with your user ID (e.g., GET /api/users/123), try changing the ID to another user’s (e.g., 124). If you can access their data, this is a critical flaw.
  4. Test Input Validation: Send malformed data, SQL commands, or script tags in `POST` parameters to test for injection and XSS vulnerabilities.

7. Container Security with Docker

In a hackathon, quickly deploying services is common. Securing these Docker containers is paramount to prevent host compromise.

`docker run –read-only -v /tmp:/tmp alpine`

`docker scan my-app-image`

`docker run –user 1000:1000 –cap-drop=ALL nginx`

Step-by-step guide:

  1. Run a Read-Only Container: Use the `–read-only` flag to run the container’s root filesystem as read-only, preventing an attacker from writing malicious files or altering the application. Use volumes for necessary writable directories.
  2. Scan for Vulnerabilities: Use `docker scan ` (powered by Snyk) to check your container image for known vulnerabilities in its base layers.
  3. Drop Capabilities: By default, containers run with unnecessary Linux capabilities. Use `–cap-drop=ALL` to remove all and `–cap-add=` to add only the specific ones required (e.g., `NET_BIND_SERVICE` for binding to privileged ports).
  4. Run as Non-Root: Use the `–user` flag to specify a non-root user ID, minimizing the impact if an attacker escapes the container.

What Undercode Say:

  • Fundamentals Trump Hype: The TARS team’s success was not built on obscure zero-days but on the rigorous application of foundational security tools and principles. Mastery of reconnaissance, vulnerability scanning, and system hardening is the true differentiator.
  • The Power of a Methodological Process: Their “chaos” was likely channeled through a basic methodology: Reconnaissance, Scanning, Exploitation (or Proof-of-Concept), and Reporting. This structured approach prevents oversight and ensures comprehensive coverage of the target environment.

The analysis suggests that hackathon victories are increasingly less about raw, genius-level exploits and more about operational excellence in executing a standard security playbook. Teams that can efficiently automate initial reconnaissance with Nmap and ZAP, quickly identify low-hanging fruit like default credentials or outdated software, and demonstrate a clear understanding of mitigation strategies (like firewall rules and SSH hardening) present a more compelling and polished case to judges. The TARS team’s story is a testament to the fact that in cybersecurity, consistency and a solid grasp of the basics will often outperform sporadic brilliance.

Prediction:

The demonstrated proficiency in foundational skills by novice teams like TARS signals a significant shift in the cybersecurity landscape. We predict that within 2-3 years, automated offensive security toolkits, powered by AI for intelligent attack path generation, will become standard at the collegiate hackathon level. This will commoditize basic vulnerability discovery, forcing participants and professionals alike to focus on more complex, logic-based vulnerabilities and advanced persistent threat (APT) simulation. The bar for entry-level security competence will be raised, making deep, conceptual understanding of system internals and secure development lifecycles the new baseline for success, both in competitions and the job market.

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Reported By: Samyuktha Gs – Hackers Feeds
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