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Introduction
Cybersecurity professionals constantly need to sharpen their skills, whether for job interviews, threat analysis, or securing systems. Izzmier Izzuddin Zulkepli’s eBook offers an affordable ($5) resource packed with practical knowledge. This article extracts key technical concepts, commands, and strategies to help you excel in cybersecurity.
Learning Objectives
- Understand essential cybersecurity interview questions and answers.
- Learn practical Linux/Windows commands for security tasks.
- Explore vulnerability assessment and mitigation techniques.
1. Essential Linux Commands for Cybersecurity
`nmap` – Network Scanning
nmap -sV -A 192.168.1.1
What it does: Scans a target IP for open ports, services, and OS detection.
How to use:
- Install `nmap` (
sudo apt install nmapon Debian-based systems). - Run the command with `-sV` (service detection) and `-A` (aggressive scan).
3. Analyze results for vulnerabilities like outdated services.
`tcpdump` – Packet Analysis
sudo tcpdump -i eth0 -w capture.pcap
What it does: Captures network traffic for forensic analysis.
How to use:
- Run with `-i` (interface) and `-w` (write to file).
2. Open `capture.pcap` in Wireshark for deeper inspection.
2. Windows Security Commands
`netstat` – Network Connections
netstat -ano | findstr LISTENING
What it does: Lists active listening ports and associated processes.
How to use:
1. Run in Command Prompt.
- Check suspicious ports (e.g., unexpected RDP or SMB).
`schtasks` – Scheduled Tasks Audit
schtasks /query /fo LIST /v
What it does: Displays all scheduled tasks (common malware persistence mechanism).
How to use:
1. Review tasks for unknown executables.
2. Remove malicious entries with `/delete`.
3. Vulnerability Scanning with OpenVAS
Installing OpenVAS
sudo apt update && sudo apt install openvas sudo gvm-setup
What it does: Sets up OpenVAS for automated vulnerability scanning.
How to use:
- Access the web interface at `https://127.0.0.1:9392`.
- Run scans against target IPs and review critical CVEs.
4. API Security Testing with Postman
Testing for Broken Object Level Authorization (BOLA)
1. Send a GET request:
GET /api/users/123 HTTP/1.1 Host: example.com Authorization: Bearer <token>
2. Change `123` to another user’s ID to test access control flaws.
5. Cloud Security: AWS Hardening
Disable Public S3 Buckets
aws s3api put-public-access-block --bucket my-bucket --public-access-block-configuration "BlockPublicAcls=true,IgnorePublicAcls=true,BlockPublicPolicy=true,RestrictPublicBuckets=true"
What it does: Prevents accidental public exposure of sensitive data.
6. Exploiting & Mitigating SQL Injection
Testing for SQLi
' OR '1'='1' --
What it does: Classic SQL injection payload to bypass authentication.
Mitigation: Use parameterized queries in code.
7. SIEM Querying (Microsoft Sentinel KQL)
Detecting Brute-Force Attacks
SecurityEvent | where EventID == 4625 | summarize count() by TargetAccount | where count_ > 5
What it does: Identifies multiple failed logins (potential brute force).
What Undercode Say
- Key Takeaway 1: Hands-on practice with tools like `nmap` and `tcpdump` is crucial for real-world cybersecurity.
- Key Takeaway 2: Cloud misconfigurations (e.g., open S3 buckets) are a leading cause of breaches—automate hardening.
Analysis: The eBook’s value lies in bridging theory and practice. While many resources focus on concepts, this guide emphasizes actionable commands and real-world scenarios.
Prediction
As cyber threats evolve, demand for practical, skills-based training will surge. Resources like this eBook will become essential for both beginners and professionals staying ahead of attackers.
Ready to level up? Get the eBook here (use code XYZDUUNC for $20 off).
🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Izzmier Alhamdulillah – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
