Skip to content
CyberXplained

Brute Force Attacks

Explore the mechanics, types, and defenses against brute force attacks in cybersecurity.

Intropasswords, authentication

What is a Brute Force Attack?

A brute force attack is a cryptographic hack that relies on guessing possible combinations of a targeted password until the correct password is discovered.

Types of Brute Force Attacks

Simple Brute Force Attack
Attempts every possible combination of characters until the correct password is found.
Dictionary Attack
Uses a prearranged list of words, such as a dictionary, to attempt to crack a password.
Hybrid Brute Force Attack
Combines dictionary attacks with simple brute force techniques.
Reverse Brute Force Attack
Starts with a known password and attempts to find a username that matches.
Rainbow Table Attack
Uses precomputed tables to crack password hashes more quickly than a traditional brute force attack.

Preventing Brute Force Attacks

  • Use strong, complex passwords with a mix of uppercase, lowercase, numbers, and special characters
  • Implement multi-factor authentication (MFA) to add an extra layer of security
  • Use CAPTCHA to prevent automated attempts
  • Implement account lockout policies after a certain number of failed attempts
  • Use password salting and strong hashing algorithms (e.g., bcrypt, Argon2) to store passwords
  • Regularly update and patch systems to address known vulnerabilities
  • Educate users about the importance of strong passwords and not reusing passwords across multiple accounts
  • Implement rate limiting on login attempts to slow down automated attacks

Brute Force Attack Simulation

Experience a simulated brute force attack in visualization

Idle

Brute force

CRACKING SPEED
5/7
___________
Attempts: 0
5

Brute force: Idle

Brute Force Tools and Commands

Common tools used in brute force attacks and their usage

  • Hydra

    FTP brute force attack

    hydra -l user -P passlist.txt ftp://192.168.0.1

  • Ncrack

    SSH brute force attack

    ncrack -vv --user admin -P passwords.txt ssh://192.168.0.1

  • Medusa

    HTTP basic auth brute force attack

    medusa -h 192.168.0.1 -u admin -P passwords.txt -M http

  • John the Ripper

    Password hash cracking

    john --wordlist=passwords.txt hashes.txt

  • Hashcat

    GPU-accelerated password cracking

    hashcat -m 0 -a 0 hashes.txt wordlist.txt