🦑How Does VPN Work?

🔒 What it does: A VPN (Virtual Private Network) secures your internet connection by encrypting your data and hiding your online activity.

⚙️ How it works:

The VPN uses encryption protocols (like AES-256) to turn your data into unreadable code, keeping your information safe from hackers and trackers.

It reroutes your internet traffic through a secure server, masking your real IP address and making it look like you're browsing from a different location.

When using unsecured networks (like cafes or airports), the VPN adds an extra layer of protection, preventing hackers from intercepting your sensitive data.

Let me know if the option if you already use a VPN is your day-to-day life.

Ref: Chirag GoswamiChirag Goswami
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Collection of about 13 coding problem patterns that I think can be incredibly beneficial for anyone looking to grasp these powerful algorithmic techniques.

1. Substring problem patterns:
- https://lnkd.in/giASrwds
2. Sliding window patterns:
- https://lnkd.in/gjatQ5pK
3. Two pointer patterns:
- https://lnkd.in/gBfWgHYe
4. Backtracking patterns:
- https://lnkd.in/g9csxVa4
- https://lnkd.in/gVkQX5vA
5. Dynamic Programming patterns:
- https://lnkd.in/gbpRU46g
- https://lnkd.in/gcnBActT
6. Binary search patterns:
- https://lnkd.in/gKEm_qUK
7. Tree patterns:
- https://lnkd.in/gKja_D5H
8. Graph patterns:
- https://lnkd.in/gKE6w7Jb
9. Monotonic patterns:
- https://lnkd.in/gdYahWVN
10. Bit manipulation patterns:
- https://lnkd.in/gmMMST5J
11. String question patterns:
- https://lnkd.in/gkNvEi8j
12. DFS and BFS patterns:
- https://lnkd.in/gPgpsgaQ
- https://lnkd.in/gd4ekfQe
13. 14 Coding interview patterns:
- https://lnkd.in/gMZJVkFf

Consistency is the key!

Here are some of the best platforms to practice DSA problems daily.

1. HackerRank
2. LeetCode
3. GeeksforGeeks
5. takeUforward Youtube Channel
- https://lnkd.in/d-UNHu6B
7. Piyush Agarwal Youtube Channel
- https://lnkd.in/dtBth5PF
6. 𝗖𝗼𝗱𝗲 𝗪𝗶𝘁𝗵 𝗛𝗮𝗿𝗿𝘆 Youtube Channel
- https://lnkd.in/d-Uq-tCn

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

🦑Wi-Fi Hacking Notes: Master Wireless Security!
🟧🟧🟧🟧🟩🟩🟡🟡🟩🟩🟪🟪🟪🟪

Are you curious about wireless network security or aspiring to become a cybersecurity expert? 🌐 This guide to Wi-Fi Hacking explores techniques and tools to test the vulnerabilities of wireless networks—ethically! 💡

🔑 What You’ll Learn in These Notes:
1️⃣ Wi-Fi Security Protocols: WEP, WPA, WPA2, WPA3 🔒
2️⃣ Common Attacks:
• Deauthentication Attack: Disconnect clients from a network.
• WPS PIN Attack: Exploit weak WPS configurations.
• Handshake Capturing: Intercept authentication traffic for cracking.
3️⃣ Powerful Tools:
• Aircrack-ng Suite: A complete toolkit for testing wireless networks.
• Reaver: Crack WPS PINs.
• Wireshark: Analyze wireless traffic.
• Kismet: Detect hidden networks and sniff packets.
4️⃣ Best Practices:
• Use Kali Linux for a ready-to-go penetration testing environment.
• Learn command-line techniques to work efficiently.
• Practice in controlled environments to ensure ethical testing.

⚙️ Step-by-Step Process for Ethical Hacking

1️⃣ Identify the Target Network: Use tools like airodump-ng to scan available networks.
2️⃣ Capture the Handshake: Disconnect a user with a deauthentication attack and capture the handshake with tools like aireplay-ng.
3️⃣ Analyze the Handshake: Use tools like Aircrack-ng or Hashcat to brute force or analyze the handshake.
4️⃣ Test for WPS Vulnerabilities: Run tools like Reaver to exploit weak WPS pins.
5️⃣ Analyze Network Traffic: Use Wireshark for packet analysis and identifying potential weaknesses.

🛡 Strengthen Your Wi-Fi Security
• Use WPA3 or WPA2 with strong passwords.
• Disable WPS to prevent brute-force attacks.
• Regularly update your router firmware to patch vulnerabilities.
• Use a strong SSID name that doesn’t reveal personal information.

🦑Highest Rank AI .gif Generator : (Trial)

https://picsart.com/ai-gif-generator/

🦑All Free: Useful payloads and bypass for Web Application Security and Pentest/CTF:

https://github.com/swisskyrepo/PayloadsAllTheThings

🦑Network Protocols: The Unsung Heroes of Communication

Think of networking protocols as the secret language that devices use to talk to each other on a network. They're essential for everything from browsing the web (DNS, TCP/IP, HTTPS) to sending emails (SMTP) and having real-time chats (WebSocket).

Here's a quick rundown of some key protocols:

DNS: Turns website names into computer addresses (IP addresses).
TCP/IP: The power couple of the internet. TCP chops data into packets and ensures reliable delivery, while IP addresses and routes them.
HTTPS: Secures your web browsing with encryption.
SMTP: Delivers your emails efficiently.
WebSocket: Enables real-time chat and data exchange.
DHCP: Assigns IP addresses to devices on a network automatically.
UDP: Prioritizes speed for streaming, gaming, and voice calls.

Understanding these protocols gives you a deeper appreciation for how the digital world works.

Ref: Rocky Bhatia
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Hack Together: The Microsoft Fabric Global AI Hack

Official Repo:
https://github.com/microsoft/Hack-Together-Fabric-AI

🦑𝐍𝐞𝐭𝐰𝐨𝐫𝐤 𝐀𝐭𝐭𝐚𝐜𝐤𝐬 𝐄𝐱𝐩𝐥𝐚𝐢𝐧𝐞𝐝
🔹 𝐌𝐈𝐓𝐌 (𝐌𝐚𝐧-𝐢𝐧-𝐭𝐡𝐞-𝐌𝐢𝐝𝐝𝐥𝐞) 𝐀𝐭𝐭𝐚𝐜𝐤: Interception of communication between two parties by a third party, potentially altering messages (e.g., an attacker intercepts messages between Alice and Bob).

🔹𝐑𝐨𝐨𝐭𝐤𝐢𝐭𝐬: Malicious software that provides privileged access to a computer while hiding the attacker's presence (e.g., an attacker installs a rootkit on a server to avoid detection).

🔹 𝐁𝐨𝐭𝐧𝐞𝐭𝐬: Networks of compromised devices controlled by a central entity, used for malicious activities like DDoS attacks (e.g., thousands of infected computers flood a website).

🔹𝐈𝐏 𝐒𝐩𝐨𝐨𝐟𝐢𝐧𝐠: Sending packets with a fake source IP address to impersonate another device or mask traffic origin (e.g., an attacker tricks a server into thinking a request is from a trusted source).

🔹 𝐃𝐃𝐨𝐒 (𝐃𝐢𝐬𝐭𝐫𝐢𝐛𝐮𝐭𝐞𝐝 𝐃𝐞𝐧𝐢𝐚𝐥 𝐨𝐟 𝐒𝐞𝐫𝐯𝐢𝐜𝐞): Overwhelming a server with traffic from multiple sources, making it unavailable to legitimate users (e.g., using a botnet to crash a website).

🔹𝐃𝐍𝐒 𝐒𝐩𝐨𝐨𝐟𝐢𝐧𝐠: Providing false DNS responses to redirect victims to malicious sites, often to steal information (e.g., redirecting users to a fake bank website).

Ref: Praveen Singh
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑You've probably heard of JWT - Json Web Tokens.
It is a format designed to securely transfer information between two parties, so it is mainly used to authenticate and transmit information in an encrypted way by using different algorithms when it consists of three parts (Header, Payload, and Signature).

I recently visited a website that manages couriers since I myself am waiting for delivery. He is vulnerable, he is not secure, he is "weak." A weakness that I was able to locate was expressed in the fact that the server stores information about couriers (scheduling) for that courier in JWT format. The information inside is by "x" (identifier) and "y" (shipping). There is no defense mechanism in place, which leads to security weakness and damage to credibility.

It turns out (unfortunately) that anyone can edit the payload content (change a shipping ID to data belonging to another user), and without verifying the signature, the server will receive the edited token as valid, which leads to data tampering, exposing details, and also Rxss because it turns out that there is no filtering on user input.

What's more, it's not normal!
The problem with the JWT header is that it contains information such as id and num, for example, while it does not store information about the encryption type (alg) and the type of token (typ) at all. Using a header to store such data is a security weakness because the header is both unsigned and can be easily modified.

Platforms like Portswigger have modules that focus on attacks on jwt that can also be used to learn about secure development
JWT (Algorithm confusion, Header Injections, etc.)

Ref: Adam Kahlon
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑AWS Cloud #tips : The Backbone of Modern Technology!🌟

🔎 What is AWS (Amazon Web Services)?
AWS is the world’s most comprehensive and widely adopted cloud platform, offering 200+ fully featured services across compute, storage, databases, networking, AI, IoT, and more. Trusted by millions, AWS enables businesses of all sizes to innovate faster and scale effortlessly.

🌟 Why AWS Stands Out:

1️⃣ Global Infrastructure:
• Operates across 31 geographic regions and 99 Availability Zones, ensuring low latency, reliability, and scalability.
• Plans for 15 more regions are underway, making AWS one of the largest global networks.

2️⃣ Cost Optimization:
• AWS follows a pay-as-you-go model, meaning you only pay for what you use.
• Tools like AWS Cost Explorer and Savings Plans help optimize your cloud spend.

3️⃣ Unmatched Security:
• Industry-leading security protocols, compliance with over 140 global standards, and data encryption ensure peace of mind.
• AWS also provides IAM (Identity and Access Management) for granular security control.

4️⃣ Innovation-Driven:
• AWS offers cutting-edge tools for AI/ML (SageMaker), Big Data (EMR), and Serverless Computing (Lambda).
• Pioneering advancements in Edge Computing with services like AWS Outposts and Wavelength.

5️⃣ Ease of Use for Developers:
• A user-friendly console, SDKs, APIs, and CLI make building and managing applications seamless.
• Offers templates via CloudFormation for infrastructure automation.

💻 Most Popular AWS Services
• EC2: Scalable compute power for running applications.
• S3: Highly durable object storage for backups, data lakes, and archives.
• RDS & DynamoDB: Managed relational and NoSQL databases.
• CloudFront: Fast and secure content delivery network.
• Lambda: Event-driven serverless computing without infrastructure management.

📚 AWS Certification Pathway

AWS certifications validate your skills and open doors to career opportunities. Popular certifications include:
• AWS Certified Solutions Architect (Associate)
• AWS Certified Cloud Practitioner
• AWS Certified DevOps Engineer

🚀 Who Uses AWS?
• Startups: Accelerate development with low upfront costs.
• Enterprises: Achieve agility and scale globally.
• Developers & IT Professionals: Innovate and build cutting-edge solutions.

🌟 Getting Started:
• Try AWS Free Tier to explore its services risk-free.
• Explore AWS tutorials, documentation, and online courses to boost your skills.

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

🦑Protect Your Inbox Like a Pro! 🔒

Your email is a goldmine for cybercriminals, containing personal, professional, and financial information. But fear not—here’s how to safeguard it effectively:

🛡️ Top Email Security Tips:

1️⃣ Enable Multi-Factor Authentication (MFA): A strong password isn’t enough. MFA adds an extra layer of security.
2️⃣ Beware of Phishing Emails: Don’t click on suspicious links or attachments. Verify the sender before taking action.
3️⃣ Use Strong Passwords: Avoid predictable passwords like “password123.” Use a combination of upper/lowercase letters, numbers, and symbols.
4️⃣ Encrypt Your Emails: Protect sensitive information by using email encryption tools.
5️⃣ Keep Software Updated: Ensure your email client and antivirus software are always up-to-date.
6️⃣ Educate Yourself and Your Team: Awareness is your first line of defense. Share best practices with colleagues.

🚨 Common Email Security Threats:

🔸 Phishing: Fake emails designed to steal your information.
🔸 Spoofing: Attackers pretending to be trusted contacts.
🔸 Ransomware: Malicious attachments locking you out of your data.
🔸 BEC (Business Email Compromise): Fraudulent emails targeting businesses.

🔐 Remember: A secure inbox equals a secure life. Take action now to protect your data and privacy!

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

🦑Detection of teams convoC2 Mainly used by Red Teamers recent days.

Basically it causes out bound requests to C2 Server, exfiltrates command outputs from Adaptive Cards images URLs and inserting data into hidden span tags in Microsoft teams conservations.
The fact that the victim only sends http queries to Microsoft servers and the antivirus doesn't examine MS teams log files and in absence of direct connection between the victim and attacker in this case its very difficult to detect.

Here is the custom KQL to Detect.

CloudAppEvents
| where Timestamp > ago(1h)
| where Application contains "Microsoft Teams"
| where ActionType contains "AppInstalled"
| where parse_json(RawEventData)["AddOnName"] == 'Workflows'

Ref: Kintali Sai Dinesh
@UndercodeCommunity
▁ ▂ ▄ U𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑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ⓔ ▄ ▂ ▁