🦑18 Must-Have Free Tools for Cybersecurity Enthusiasts 🛡️

As a cybersecurity professional, staying ahead of the curve requires constant learning and hands-on practice. The good news? You don’t need to break the bank to access industry-leading tools. Here's a curated list of 18 free cybersecurity tools to elevate your skills—whether you're a beginner or a seasoned expert!

🔵 1. Kali Linux
The ultimate penetration testing operating system for ethical hackers.

🔵 2. Wireshark
A network protocol analyzer that lets you capture and inspect data in real time.

🔵 3. Burp Suite Community Edition
Perfect for web application security testing and vulnerability assessments.

🔵 4. Gophish
An open-source phishing toolkit for creating realistic phishing campaigns.

🔵 5. Aircrack-ng
Specializes in cracking WEP/WPA Wi-Fi passwords.

🔵 6. Have I Been Pwned?
Check if your email or accounts have been compromised in data breaches.

🔵 7. Metasploit Framework
A penetration testing powerhouse for exploiting vulnerabilities.

🔵 8. Nikto
Scans web servers for dangerous files, outdated software, and misconfigurations.

🔵 9. HackTheBox
An interactive training platform to sharpen your hacking skills.

🔵 10. pfSense
A firewall and router solution for network protection.

🔵 11. CyberChef
A versatile tool for analyzing, encrypting, and decoding data.

🔵 12. Ghidra
An open-source reverse engineering tool by the NSA.

🔵 13. Deshashed
Enhance email security by detecting exposed credentials.

🔵 14. OpenVAS
A comprehensive vulnerability scanner for systems and networks.

🔵 15. OSSEC
Monitor and prevent intrusions in your environment with this HIDS tool.

🔵 16. SQLmap
Automatically detect and exploit SQL injection vulnerabilities.

🔵 17. REMnux
Reverse engineering and malware analysis made accessible.

🔵 18. Zed Attack Proxy (ZAP)
A web application security scanner for discovering vulnerabilities.


🌟 Why Use These Tools?
- Cost-Effective: Free but highly efficient.
- Industry Standard: Frequently used by professionals worldwide.
- Skill Development: Master critical areas like penetration testing, vulnerability analysis, and data protection.

Ref: Arun KL
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑𝗣𝗼𝘄𝗲𝗿𝗦𝗵𝗲𝗹𝗹 𝗦𝗲𝗹𝗳-𝗣𝘄𝗻 𝗗𝗲𝘁𝗲𝗰𝘁𝗶𝗼𝗻

The Proofpoint blog outlines a social engineering tactic where threat actors deceive users into copying and pasting malicious PowerShell scripts, causing malware infections. Groups like TA571 use fake error messages to prompt script execution, delivering malware such as DarkGate and NetSupport. Despite needing significant user interaction, the attack's success hinges on sophisticated social engineering. I have developed a custom detection PowerShell Self-Pwn KQL to identify such scenarios and assist SecOps in isolating affected devices.

Ref: Steven Lim
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Security collection for pro:

✅Worm Infection: https://lnkd.in/ez-kq98Y
✅Social Engineering: https://lnkd.in/e_FJbxDP
✅Information Leakage: https://lnkd.in/eeN8KX8g
✅Insider Abuse: https://lnkd.in/ep4p_THk
✅Customer Phishing: https://lnkd.in/ekTfY7vz
✅Scam: https://lnkd.in/eUHwG3fF
✅Trademark infringement: https://lnkd.in/e3P3xfeb
✅Phishing: https://lnkd.in/eYTi3RQ8
✅Ransomware: https://lnkd.in/eRkctdQn
✅Large_scale_compromise: https://lnkd.in/eYFF43b4
✅3rd-party_compromise: https://lnkd.in/e8SAu5MT
✅Windows Intrusion: https://lnkd.in/eXCpcx9V
✅Unix Linux lntrusionDetection: https://lnkd.in/eHkm6MMe
✅DDOS: https://lnkd.in/eQ7zZzVt
✅MaliciousNetworkBehaviour: https://lnkd.in/ewVZy2cs
✅Website-Defacement: https://lnkd.in/eraNiHcH
✅WindowsMalwareDetection: https://lnkd.in/ewEx_C6Y
✅Blackmail: https://lnkd.in/eW3zGcPs
✅SmartphoneMalware.pdf: https://lnkd.in/ezjyY4G9

Ref: Mohamad Hamadi
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Takeover poc Video dem:

Password Reset Link not expiring after changing the email Leads To Account Takeover poc 🚨

📝 Description:
In this video, I’ll demonstrate a critical vulnerability where a password reset link remains active even after changing the registered email, leading to a potential account takeover exploit. This live PoC showcases the risk and offers insights into preventing such flaws.

🦑Top Free Java Projects:

1. Airline Reservation System:
- https://lnkd.in/dRFK2vPh

2. Data Visualization Software:
- https://lnkd.in/dVWVU8xn

3. Electricity Billing System:
- https://lnkd.in/dekycNXQ

4. E-Healthcare Management System:
- https://lnkd.in/dEkE2raN

5. Email Client Software:
- https://lnkd.in/d_qz7U9E

6. Library Management System:
- https://lnkd.in/dY7bDjFn

7. Network Packet Sniffer:
- https://lnkd.in/dXPtyzz4

8. Online Bank Management System:
- https://lnkd.in/d4Qzy8fN

9. Online Medical Management System:
- https://lnkd.in/dHciHGGz

10. Online Quiz Management System:
- https://lnkd.in/djKs3DJq

11. Online Survey System:
- https://lnkd.in/dw9Cmhix

12. RSS Feed Reader:
- https://lnkd.in/dupDQPnG

13. Smart City Project:
- https://lnkd.in/d3YT36aJ

14. Stock Management System:
- https://lnkd.in/dTb3hikj

15. Supply Chain Management System:
- https://lnkd.in/dAzJthMQ

16. Virtual Private Network:
- https://lnkd.in/dyEcgrFC

Ref: Rajat Gajbhiye
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑How Was the TOR Attacker Caught? 🕵️♂️

🌐 The Dark Web often seems like an untraceable haven for anonymity. But even in the world of TOR (The Onion Router), attackers can be caught! Here’s how:

1️⃣ Human Error: Attackers often make small mistakes, like logging in from a non-TOR connection or revealing identifying details in their communications. Even a single misstep can be critical.

2️⃣ Traffic Analysis: TOR masks your identity by routing traffic through multiple nodes. However, law enforcement can use advanced traffic correlation techniques to identify entry and exit points, especially when they control some TOR nodes.

3️⃣ Compromised Nodes: Investigators may run malicious TOR nodes to intercept traffic. They analyze the data flowing through them, narrowing down potential suspects.

4️⃣ Exploits: Vulnerabilities in TOR or the user’s device/browser can be exploited to reveal real IP addresses. For example, Operation Onymous used malware to expose hidden server locations.

5️⃣ Metadata Tracking: Even encrypted communications leave traces. Authorities piece together patterns, times, and behaviors to zero in on suspects.

💡 Key Takeaway: No system is 100% secure. Cybercriminals often underestimate the combination of technical expertise and human ingenuity behind modern investigations.

Ref: Mahesh Girhe
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Xss
#tips
1. Get endpoints from wayback.
2. And then knoxnl -i endpoints.txt -afb -sb 1

🦑 All free Training +Certifications:


https://github.com/cloudcommunity/Free-Certifications

🦑Large Hacking google dorks collections:

https://github.com/Proviesec/google-dorks/blob/main/all-google-dorks.txt

🦑𝐂𝐨𝐦𝐩𝐚𝐧𝐲 𝐖𝐢𝐬𝐞 𝐒𝐐𝐋 𝐈𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰 𝐐𝐮𝐞𝐬𝐭𝐢𝐨𝐧𝐬

Here , I have listed out all SQL interview questions for your easy reference.

1. Amazon SQL Interview Question for Data Analyst Position [2-3 Year Of Experience ] | Data Analytics
https://lnkd.in/g2RzsKdq

2. Airbnb SQL Interview Question | Convert Comma Separated Values into Rows | Data Analytics
https://lnkd.in/gpMbU-dF

3. Adobe Interesting SQL Interview Question | Solving Using 2 Approaches | Data Analytics
https://lnkd.in/g_-_9ymd

4. Spotify SQL Interview Problem | Top 5 Artists | Aggregation and Window Functions in SQL
https://lnkd.in/gtfaugd3

5. L&T Technology Services SQL Interview Problem | Print Highest and Lowest Salary Employees in Each Department
https://lnkd.in/ggY82FJW

6. Ameriprise Financial Services, LLCSQL Interview Problem | Data Analytics
https://lnkd.in/gS_Yqq6c

7. Tiger Analytics SQL Interview Question for Data Engineering Position
https://lnkd.in/ghjE_CXp

8. PwC SQL Interview Question | BIG 4 |Normal vs Mentos Life 😎
https://lnkd.in/g9SkkX9x

9. Honeywell SQL Interview Question | Print Movie Stars (⭐ ⭐ ⭐ ⭐⭐) For best movie in each Genre
https://lnkd.in/gSDgB9Me

10. Angel One Easy-Peasy SQL Interview Question for a Data Science Position
https://lnkd.in/geaU3we7

11. Practice FAANG SQL Interview Questions For Free | Ace The SQL Interview | Data Analytics
https://lnkd.in/g4AFgen3

12. Accenture SQL Interview Question | Database Case Sensitivity vs Insensitivity
https://lnkd.in/gR6F_8zf

13. American Express SQL Interview Question and Solution | Page Recommendation
https://lnkd.in/g_sMN26m

14. Fractal Analytics SQL Interview Question (Game of Thrones Database) | SQL for Data Engineer
https://lnkd.in/gGcsBms5

15. Netflix Data Cleaning and Analysis Project | End to End Data Engineering Project (SQL + Python)
https://lnkd.in/gS8mT7Fn

16. Swiggy Data Analyst SQL Interview Question and Answer
https://lnkd.in/gSyhmmhd

17. Cracked Myntra as Data Analyst with 1 Year Experience
https://lnkd.in/gekpAit8

18. PwC SQL Interview Question for a Data Analyst Position | SQL For Analytics
https://lnkd.in/gyD5Pjny

19. PayPal Data Engineer SQL Interview Question (and a secret time saving trick)
https://lnkd.in/gAJ_Ug79

20. Adobe Interesting SQL Interview Question | Solving Using 2 Approaches | Data Analytics
https://lnkd.in/gEEAfi8j

21. Walmart Labs SQL Interview Question for Senior Data Analyst Position | Data Analytics
https://lnkd.in/gRBPb-ms

22. PayPal SQL Interview Problem (Level Hard) | Advanced SQL Problem
https://lnkd.in/gGZaYt6N

Ref: Abhisek Sahu
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑SQL Injection Detection Techniques"

SQL Injection remains a critical vulnerability in web applications. Detecting it early is key to protecting your data. Some effective detection techniques include.

Ref: Amit Kumar
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Roadmap for learning Low-Level Design (LLD):

➤ 𝗙𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹 𝗖𝗼𝗻𝗰𝗲𝗽𝘁𝘀:

1. Basics OOP Concepts:
- https://lnkd.in/dhX-yYnb
2. SOLID Principles:
- https://lnkd.in/drsM7izj
3. DRY, YAGNI and KISS Principle:
- https://lnkd.in/d7Dk9Mpb
- https://lnkd.in/dvdm2mgR

➤ 𝗗𝗲𝘀𝗶𝗴𝗻 𝗣𝗮𝘁𝘁𝗲𝗿𝗻𝘀

1. Creational Patterns
- Singleton, Factory Method, Abstract Factory, Builder, Prototype and Structural Patterns
- https://lnkd.in/dfr_3f-U
- https://lnkd.in/d2s88tuV

2. Adapter
- Facade, Decorator, Composite and Behavioral Patterns
- https://lnkd.in/dtiFe8AN

3. Strategy
- Iterator, Observer, Template Method, Command and State

➤ 𝗨𝗻𝗶𝗳𝗶𝗲𝗱 𝗠𝗼𝗱𝗲𝗹𝗶𝗻𝗴 𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲 (𝗨𝗠𝗟)

1. Class Diagrams
- Class, Attributes, Methods, Interfaces, Abstract Class, Enumeration and Multiplicity
- https://lnkd.in/dxeh7vSz

2. Use Case, Sequence, Activity and State Machine Diagram
- https://lnkd.in/dgVYbmPA

➤ 𝗪𝗮𝘁𝗰𝗵 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲𝘀:

1. Shrayansh Jain: https://lnkd.in/dhW5VmFa
2. Gaurav Sen: https://lnkd.in/dgjFGmXc
3. The Code Mate: https://lnkd.in/d8_6yTSN
4. Soumyajit Bhattacharyay: https://lnkd.in/dFe4t5gZ

➤ 𝗧𝗼𝗽 𝗥𝗲𝗽𝗼𝘀𝗶𝘁𝗼𝗿𝗶𝗲𝘀 𝘁𝗼 𝗠𝗮𝘀𝘁𝗲𝗿 𝗟𝗟𝗗​:

- https://lnkd.in/dAb9m84N
- https://lnkd.in/dvzAdaGt
- https://lnkd.in/dXypcpR4
- https://lnkd.in/dBYMX7Ph

➤ 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹 𝗘𝘅𝗮𝗺𝗽𝗹𝗲𝘀:

- Standard problem solutions: https://lnkd.in/dXypcpR4
- Practice questions: https://lnkd.in/dCMb2nFV

➤ 𝗦𝗲𝗹𝗳-𝗔𝘀𝘀𝗲𝘀𝘀𝗺𝗲𝗻𝘁:

- Question 1: https://lnkd.in/dQRCdKhs
- Question 2: https://lnkd.in/dHmEiE79

Just preparing for DSA is not going to get you selected. During technical interviews, you are expected to have some level of understanding of low-level designs.

Ref: Rajat GajbhiyeRajat Gajbhiye
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Example of AI can detect Zero day Exploits:

https://youtu.be/cv9HbGZLQ9o

🦑PowerShell-Hunter: Your New Favorite Event Log Analysis Tool!

🔍 Tired of drowning in PowerShell logs? We've got you covered:
• Smart pattern detection for malicious behaviors
• Risk scoring to prioritize threats
• Export to CSV/JSON for your workflow
• Extensible pattern matching

🚀 Perfect for:
• Incident Response
• Threat Hunting
• Forensics
• SOC Analysis

💡 Why PowerShell-Hunter?
• Process thousands of 4104 events in seconds
• Pre-configured detection patterns
• Catch encoded commands, suspicious downloads, and more
• Built by defenders, for defenders

🔥 Get started: https://github.com/MHaggis/PowerShell-Hunter

Ref: Michael H
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Get Your AI powered terminal assistant:

curl -sS https://raw.githubusercontent.com/ekkinox/yai/main/install.sh | bash