How Hackers Think: A Quick Guide to Common Cyber Attacks

🚨 Comment pensent les hackers ?

Petit tour des classiques du hacking :

• 🎣 Phishing → “Clique ici pour récupérer ton colis” (et surtout pour me donner tes identifiants).
• 🔒 Ransomware → Tu récupères tes fichiers… mais d’abord, paye.
• 🛑 SQL Injection → Un simple `’ OR 1=1 –` et boom, accès aux données sensibles.
• 🌍 DNS Spoofing → Ton site bancaire a l’air normal ? Il ne l’est peut-être pas.
• 💀 XSS → Tu laisses un commentaire et… ton site se fait injecter du code.
• 🚧 DoS → Faire crasher un serveur à coups de requêtes.

💡 Comment éviter de tomber dans le piège ?
– Sensibilisation : 90% des attaques commencent par un humain distrait.
– Zero Trust : On ne fait confiance à rien, ni personne, par défaut.
– Sécurisation des entrées : Un bon développeur ne laisse pas une injection SQL possible.
– Surveillance : SIEM, IDS, monitoring… il faut voir ce qui se passe en temps réel.

You Should Know:

1. Preventing SQL Injection

• Always use parameterized queries or prepared statements.

  -- Bad Practice
  SELECT * FROM users WHERE username = '" + userInput + "' AND password = '" + passInput + "';</li>
  </ul>
  
  -- Good Practice
  SELECT * FROM users WHERE username = ? AND password = ?;
  

  – Sanitize user inputs to remove special characters.

  
  <h1>Example in Linux using sed</h1>
  
  echo $userInput | sed 's/[^a-zA-Z0-9]//g'
  

  2. Detecting Phishing Emails

  • Use tools like `rspamd` or `SpamAssassin` to filter phishing emails.

    sudo apt-get install spamassassin
    sudo systemctl start spamassassin
    

  • Check email headers for suspicious domains.

    cat email.txt | grep -i "from:"
    

  3. Mitigating Ransomware

  • Regularly back up data using `rsync` or tar.

    rsync -av /path/to/data /path/to/backup
    tar -czvf backup.tar.gz /path/to/data
    

  • Use tools like `ClamAV` to scan for malware.

    sudo apt-get install clamav
    sudo freshclam
    clamscan -r /path/to/scan
    

  4. Preventing XSS Attacks

  • Sanitize user inputs in web applications.

    // Example in JavaScript
    function sanitizeInput(input) {
    return input.replace(/<script.<em>?>.</em>?<\/script>/gi, '');
    }
    

  • Use Content Security Policy (CSP) headers.

    </li>
    </ul>
    
    <h1>Example in Apache</h1>
    
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
    

    5. Defending Against DoS Attacks

    • Use `iptables` to limit connections.

      sudo iptables -A INPUT -p tcp --dport 80 -m connlimit --connlimit-above 20 -j DROP
      

    • Implement rate limiting with fail2ban.

      sudo apt-get install fail2ban
      sudo systemctl start fail2ban
      

    What Undercode Say:

    Understanding hacker tactics is the first step in building a robust defense. By implementing secure coding practices, using monitoring tools, and educating users, you can significantly reduce the risk of cyber attacks. Always stay updated with the latest security trends and tools to keep your systems safe.

    For further reading:

    • OWASP SQL Injection Prevention
    • Phishing Detection Tools
    • Ransomware Prevention Guide

    References:

    Reported By: Biren Bastien – Hackers Feeds
    Extra Hub: Undercode MoN
    Basic Verification: Pass ✅

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