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Introduction
Bug bounty hunting and penetration testing require a deep understanding of cybersecurity tools, commands, and techniques. Whether you’re testing web applications, networks, or APIs, mastering these commands can help uncover vulnerabilities efficiently. Below, we cover critical Linux, Windows, and cybersecurity commands, along with step-by-step guides on how to use them.
Learning Objectives
- Learn essential Linux and Windows commands for penetration testing.
- Understand how to exploit and mitigate common vulnerabilities.
- Gain hands-on experience with API security and cloud hardening techniques.
1. Network Scanning with Nmap
Command:
nmap -sV -A -T4 target.com
What it does:
Performs an aggressive scan (-A) with version detection (-sV) and fast execution (-T4).
Step-by-Step Guide:
1. Install Nmap if not already present:
sudo apt install nmap Linux
2. Run the scan against a target domain or IP.
3. Analyze open ports, services, and potential vulnerabilities.
2. Directory Bruteforcing with Dirb
Command:
dirb http://target.com /usr/share/wordlists/dirb/common.txt
What it does:
Scans a website for hidden directories using a predefined wordlist.
Step-by-Step Guide:
1. Install Dirb:
sudo apt install dirb
2. Run the command with a target URL.
- Review discovered directories for sensitive files (e.g.,
/admin,/backup).
3. Exploiting SQL Injection with SQLmap
Command:
sqlmap -u "http://target.com/page?id=1" --dbs
What it does:
Automates SQL injection attacks to extract database information (--dbs lists databases).
Step-by-Step Guide:
1. Install SQLmap:
sudo apt install sqlmap
2. Test a vulnerable parameter (`id=1`).
- Use `–dump` to extract table data if SQLi is confirmed.
4. Windows Privilege Escalation with PowerUp
Command (PowerShell):
Invoke-AllChecks
What it does:
Identifies misconfigurations for local privilege escalation in Windows.
Step-by-Step Guide:
1. Download PowerUp.ps1 from GitHub.
2. Load the script in PowerShell:
. .\PowerUp.ps1
3. Execute `Invoke-AllChecks` to find vulnerabilities.
- API Security Testing with Postman & Burp Suite
Command (Burp Suite Proxy):
Intercept API requests and modify them for testing.
Step-by-Step Guide:
1. Configure Burp Suite as a proxy.
2. Capture API requests (e.g., `/api/v1/user`).
- Test for IDOR, Broken Authentication, or Injection flaws.
6. Cloud Hardening (AWS S3 Bucket Permissions)
Command (AWS CLI):
aws s3api put-bucket-acl --bucket my-bucket --acl private
What it does:
Ensures an S3 bucket is not publicly accessible.
Step-by-Step Guide:
1. Install AWS CLI and configure credentials.
2. Check current permissions:
aws s3api get-bucket-acl --bucket my-bucket
3. Apply restrictive permissions if needed.
7. Vulnerability Mitigation (Patch Management in Linux)
Command:
sudo apt update && sudo apt upgrade -y
What it does:
Updates all installed packages to the latest secure versions.
Step-by-Step Guide:
1. Run the command regularly to prevent exploits.
2. Enable automatic updates:
sudo apt install unattended-upgrades
What Undercode Say
- Key Takeaway 1: Automation tools like SQLmap and Nmap save time but must be used ethically.
- Key Takeaway 2: Cloud misconfigurations (e.g., open S3 buckets) are low-hanging fruit for attackers.
Analysis:
Bug bounty hunters must balance offensive testing with defensive hardening. Continuous learning in API security, cloud configurations, and privilege escalation techniques is crucial. As AI-driven security tools evolve, manual testing remains indispensable for uncovering logic flaws.
Prediction
With AI-powered penetration testing tools on the rise, bug bounty programs will increasingly automate vulnerability detection. However, human ingenuity will still be needed to exploit complex business logic flaws and zero-day vulnerabilities.
IT/Security Reporter URL:
Reported By: Meowsint My – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
