Here are some password dictionaries that can be used with Backtrack or Kali Linux. The list below is a collection of the most commonly used passwords if you can’t hack Wifi or any other account using Brute Force.

You can review how to Brute Force password Facebook at >>this post<<

BIG-WPA-LIST needs to be decompressed before use.

This list of passwords can be used to Brute Force passwords (Wifi, Facebook, Gmail, etc.)

WPA/WPA 2 Dictionaries Downloads

The term Brute Force has been mentioned a lot recently after Hieu PC attacked a fake website with a Brute Force Attack form, to log into cPanel – the tool that hosts and manages that fake website. Today we will learn what Brute Force Attack is and How to prevent it.

Unlike many other tactics used by Hackers, attacks Brute Force do not rely on the site’s security holes. Instead, these attacks rely on users having weak or predictable credentials. Simple attacks and defined targets make attacks Brute Force very popular.

What is Brute Force Attack?

Brute Force attack occurs when a hacker tries to try each password to see if it can log in. These attacks typically involve multiple attempts at the account password in the hopes that one of them will be valid. It’s a bit like you’re having a bunch of keys and trying to lock them one by one, but on a much larger scale.

Passwords aren’t the only resources that can be vulnerable to this type of attack: Links and directories, usernames, and emails are other common targets.

What is the purpose of Brute Force attack?

The goal of a Brute Force attack is to gain access to a restricted resource for other users. This could be for an admin account, a password protected site, or simply for listing valid emails on a certain website.

Having access to a valid account can mean that you are the owner of that Website, free to change, edit or even delete the Website.

How does Brute Force attack work?

The most common type of brute force attack is dictionary attack using a common username and password to try to gain access to the admin account.

Typically, generic dictionary attacks will try to log in with the most commonly used credentials, such as “admin” and “123456”.

How do you know if you are suffering from Brute Force?

Basically, if someone is trying to log into an account repeatedly and fails, it could be a Brute Force attack.

Signs may include:

• Same IP address fails when trying to login multiple times.
• Many different IP addresses trying to login to one account failed.
• Multiple failed login attempts from different IP addresses within a short period of time.

Brute Force Attack Example

Possible brute force attacks add you to the botnet to expose you to DDoS attacks. Hack attack Brute Force after having login information to change the Website interface.

Gaining access to an admin account on a website is like exploiting a critical vulnerability. Hackers will try to profit from accesssuch as by adding spam, spreading malware, or phishing to keep victims unsuspecting.

Brute Force Attack Types

Basically, Brute Force is an act of trying many combinations, but there are many variations of this type of attack to increase the success rate. These are the most common:

Simple Brute Force Attack

A generic Brute Force attack can use different methods, such as repeating all possible passwords at once. This is often used on weakly secure websites where there is no limit on the number of incorrect entries.

Dictionary Attack

This attack uses a list of common passwords instead of random access, builds a “dictionary” of possible passwords, and repeats them. Using a good password list can help improve the hacker’s success rate, but these attacks require time, and the number of passwords in the dictionary you have.

If you have ever Hacked Wifi WPA2, you must have used a dictionary to detect Passwifi.

Hybrid Brute Force Attack

A hybrid attack uses both a dictionary attack and a regular repetition attack. Instead of trying literally all passwords, it will make modifications small for dictionary words, such as adding numbers or changing letters.

Credential stuffing

With the increasing amount of user/password data exposed by weakly secure websites, using multiple accounts using the same password makes it easier for accounts to be hacked.

Once the Hacker has a hacked database of Website A, they can easily use the collected login information to access Website B, if the users share the same user/password.

Therefore, regularly changing the password, and not sharing the same password for the account is a regular thing to do.

How to prevent Brute Force attack

Since Brute Force attacks are not a security hole, updating the software is not enough to protect yourself. Here are some common methods to prevent these attacks:

Use strong passwords

Brute force relies on weak passwords. Strong passwords have the following characteristics:

Only : You should avoid reusing passwords, as websites are compromised and passwords will be exposed. By reusing passwords, Hackers can more easily target you with your compromised credentials on other websites.

Long : Longer password means more combinations. A five-character password is easy to crack on any computer in seconds, 10 characters will take years, and 50 characters will take almost forever.

Hard to guess: Pieces of information like your own name or the city where you live can make passwords easier to remember, but also easier to guess if someone gets any information about you. The same goes for regular text, such as “12345” or “password,” which is commonly used in logins, because they are easy to remember.

With these characteristics in place, Brute Force attempts will fail to guess your password.

The same principles apply to recovery questions: If your recovery questions are weak but your password is strong, it’s much easier for an attacker to reset your password instead of guessing it.

Do not reveal the login link

The requirement for brute force attacks is to submit credentials. If you change the login page address – for example, switch from /login.php luxurious /anonyviet-login this may be enough to prevent most automated tools and batches from sniffing passwords.

However, advanced attacks or public forum pages require a URL for members to log in

Limit the number of wrong login attempts

Brute Force attacks are based on trying multiple passwords and accounts. By limiting the number of logins per user, Hackers won’t be able to try multiple passwords

A common way to limit login attempts is to temporarily ban an IP from logging in after five unsuccessful login attempts. If entered incorrectly, the IP will be blocked.

However, there are now some bypass tools by manually changing the IP with a proxy or VPN, helping Hackers to Brute Force continuously.

Use CAPTCHA

Captcha is a good way to prevent bots and automated tools from performing Brute Force attacks on your website by giving login challenges. Since challenges are designed to be solved by humans, tools and software will have a hard time overcoming them to prevent their attacks.

Now Hacker also released auto bypass captcha tools, including Google Captcha.

Use two-factor authentication (2FA)

2FA creates another layer of security after logging in with a user/password, such as confirmation via email or OTP SMS.

This extra layer prevents anyone from successfully obtaining your credentials.

Pause Brute Force Attacks

It’s amazing to know that one of the most popular and successful methods is man-made. Avoiding Brute Force attacks can simply be a matter of changing your security habits, such as using stronger passwords and not reusing them, or changing the login page to an easy-to-guess URL.

You can also put a little extra effort into security by setting up two-factor authentication or setting your site up later. web application firewall (WAF) . Basically, a firewall will prevent hackers from trying to break into your account.

If you want to learn the tools and how to use the tools used to Brute Force, comment below I will write a more detailed article.

This article will explain what Hydra is and how we can use this tool to crack the remote authentication service. You can see more information about Hydra in the room Advend of Cyber on Tryhackme.

What is Hydra?

Hydra is a powerful brute force tool; a quick system login password ‘hack’ tool.

We can use Hydra to iterate through a list and ‘bruteforce‘ some authentication service. Imagine you are trying to manually guess some passwords on a particular service (SSH, Web Application Form, FTP or SNMP) – we can use Hydra to cycle through the password list and speed up the process. this program to determine the correct password.

Hydra is capable of executing the following protocols: Asterisk, AFP, Cisco AAA, Cisco auth, Cisco enable, CVS, Firebird, FTP, HTTP-FORM-GET, HTTP-FORM-POST, HTTP-GET, HTTP-HEAD, HTTP -POST, HTTP-PROXY, HTTPS-FORM-GET, HTTPS-FORM-POST, HTTPS-GET, HTTPS-HEAD, HTTPS-POST, HTTP-Proxy, ICQ, IMAP, IRC, LDAP, MS-SQL, MYSQL, NCP, NNTP, Oracle Listener, Oracle SID, Oracle, PC-Anywhere, PCNFS, POP3, POSTGRES, RDP, Rexec, Rlogin, Rsh, RTSP, SAP/R3, SIP, SMB, SMTP, SMTP Enum, SNMP v1+v2+ v3, SOCKS5, SSH (v1 and v2), SSHKEY, Subversion, Teamspeak (TS2), Telnet, VMware-Auth, VNC and XMPP.

For more information on the options of each protocol in Hydra, read the official Kali Hydra tools page here.

This shows how important it is to use a strong password, if your password is common, contains no special characters or is no more than 8 characters, then it will be easily guessed. 100 million password lists exist that contain common passwords, so when a front-end application uses an easy-to-login password, you should change that password. Usually CCTV cameras and web frameworks use admin:password as default password, which is very easy to hack.

Install Hydra

If you are using Kali Linux, then hydra is already pre-installed. If not you can download here.

If you don’t have Linux or a suitable desktop environment, you can deploy your own Kali Linux machine with all the necessary security tools. You can even control Linux in your browser here.

How to use Hydra?

The options we pass into Hydra depend on the service (protocol) we are attacking. For example, if we wanted to bruteforce FTP with the username as user and the password list as passlist.txt, we would use the following command:

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

passlist you can download in post World Password Latest.

For the purposes of the Christmas challenge, here are the commands to use Hydra over SSH and the web form (POST method).

SSH

hydra -l <username> -P <full path to pass> <ip> -t 4 ssh

Explanation of options:

• -l is the username
• -P Use password list
• -t specifies the number of threads to use

Post Web Form

We can also use Hydra to bruteforce web forms, you will have to make sure you know its request type – GET or POST methods are often used. You can use the Network tab in the browser (press F12 – developer tools) to see the request method types.

Here is an example of the Hydra command to brute force a login form using the POST method.

hydra -l <username> -P <password list> <ip> http-post-form "/<login url>:username=^USER^&password=^PASS^:F=incorrect" -V

Explanation of options:

• -l: Unique username
• -P: indicates to use the following password list
• http-post-form: indicates the method type (post)
• /login url: login page URL
• :username: form field where username is entered
• ^USER^: tell Hydra to use username
• password: the form field where the password is entered
• ^PASS^: tells Hydra to use the previously provided password list
• Login: indicates to withdraw the failed login message
• Login failed: is the login failed message returned by the form
• F=incorrect: if this word appears on the page, it is incorrect
• -V: output for every attempt

You should now have enough hydra information to practice and complete the Hydra Christmas challenge.

DenyHosts is open source software that helps block brute force attacks with SSH login to help protect your Linux Server more securely. This is a fairly lightweight Tool and very simple to use, just exceed the number of incorrect logins, that IP will be blocked, unable to detect Key, Password SSH.

DenyHosts monitors and analyzes SSH Logs for false logins, dictionary-based attacks, and attacks. brute force attack by blocking the original IP addresses and adding an entry to the file /etc/hosts.deny on the server and prevent the IP address from making any further login attempts.

DenyHosts is a very essential tool for all Linux based systems, especially when we allow ssh login to remote Linux servers.

In this article, I will show you how to install and configure DenyHosts on RHEL-based Linux distributions like Fedora, CentOS, Rocky Linux, and AlmaLinux.

How to Install DenyHosts in Linux

By default, the DenyHosts tool is not built-in to the Linux system, we need to install it using a third-party EPEL repository. After adding the repository, install the DenyHosts package using the following yum command.

# yum install epel-release
# yum install denyhosts

Configure DenyHosts for IP addresses in Whitelist

After installing Denyhosts, make sure to whitelist your own IP address, so that it never gets blocked. To do this, open the file /etc/hosts.allow.

# vi /etc/hosts.allow

Below the description, add each IP address in a separate line that you don’t want to block.

#
# hosts.allow   This file contains access rules which are used to
#               allow or deny connections to network services that
#               either use the tcp_wrappers library or that have been
#               started through a tcp_wrappers-enabled xinetd.
#
#               See 'man 5 hosts_options' and 'man 5 hosts_access'
#               for information on rule syntax.
#               See 'man tcpd' for information on tcp_wrappers
#
sshd: 172.16.25.125
sshd: 172.16.25.126
sshd: 172.16.25.127

Configure DenyHosts for email alerts

The main configuration file is located in /etc/denyhosts.conf. This file is used to send email notifications about suspected logins. Open this file with an editor vi.

# vi /etc/denyhosts.conf

Find the line ‘ADMIN_EMAIL’ and add your email address here to receive email notifications of suspicious logins (for multiple emails, use commas). Each variable is fully documented so configure it to your liking.

############ DENYHOSTS REQUIRED SETTINGS ############
SECURE_LOG = /var/log/secure
HOSTS_DENY = /etc/hosts.deny
BLOCK_SERVICE  = sshd
DENY_THRESHOLD_INVALID = 5
DENY_THRESHOLD_VALID = 10
DENY_THRESHOLD_ROOT = 1
DENY_THRESHOLD_RESTRICTED = 1
WORK_DIR = /var/lib/denyhosts
SUSPICIOUS_LOGIN_REPORT_ALLOWED_HOSTS=YES
HOSTNAME_LOOKUP=YES
LOCK_FILE = /var/lock/subsys/denyhosts

############ DENYHOSTS OPTIONAL SETTINGS ############
ADMIN_EMAIL = ravisaive@tecmint.com
SMTP_HOST = localhost
SMTP_PORT = 25
SMTP_FROM = DenyHosts <tecmint@tecmint.com>
SMTP_SUBJECT = DenyHosts Daily Report

############ DENYHOSTS OPTIONAL SETTINGS ############
DAEMON_LOG = /var/log/denyhosts
DAEMON_SLEEP = 30s
DAEMON_PURGE = 1h

Restart the DenyHosts service

When you’re done with the configuration, reboot denyhosts. We also add denyhosts into startup.

# chkconfig denyhosts on
# service denyhosts start

View DenyHosts logs

To view the diary denyhosts how many attackers and hackers are trying to access your server. Please use the following command:

# tail -f /var/log/secure

Nov 28 15:01:43 tecmint sshd[25474]: Accepted password for root from 172.16.25.125 port 4339 ssh2
Nov 28 15:01:43 tecmint sshd[25474]: pam_unix(sshd:session): session opened for user root by (uid=0)
Nov 28 16:44:09 tecmint sshd[25474]: pam_unix(sshd:session): session closed for user root
Nov 29 11:08:56 tecmint sshd[31669]: Accepted password for root from 172.16.25.125 port 2957 ssh2
Nov 29 11:08:56 tecmint sshd[31669]: pam_unix(sshd:session): session opened for user root by (uid=0)
Nov 29 11:12:00 tecmint atd[3417]: pam_unix(atd:session): session opened for user root by (uid=0)
Nov 29 11:12:00 tecmint atd[3417]: pam_unix(atd:session): session closed for user root
Nov 29 11:26:42 tecmint sshd[31669]: pam_unix(sshd:session): session closed for user root
Nov 29 12:54:17 tecmint sshd[7480]: Accepted password for root from 172.16.25.125 port 1787 ssh2

Remove blocked IP address from DenyHosts

If you want to remove that blocked IP address from denyhosts. You need to stop the tool.

# /etc/init.d/denyhosts stop

To remove or completely remove blocked IP address. You need to edit the following files and remove the IP address.

# vi /etc/hosts.deny
# vi /var/lib/denyhosts/hosts
# vi /var/lib/denyhosts/hosts-restricted
# vi /var/lib/denyhosts/hosts-root
# vi /var/lib/denyhosts/hosts-valid
# vi /var/lib/denyhosts/users-hosts

After removing the blocked IP address, restart the service.

# /etc/init.d/denyhosts start

The offending IP address has been added to all files in the directory /var/lib/denyhosts, so it is difficult to determine which file contains the offending IP address. One of the best ways to find out the IP address is to use the grep command. Example to find out IP address 172.16.25.125:

cd /var/lib/denyhosts
grep 172.16.25.125 *

Permanently whitelist IP addresses in DenyHosts

If you have a list of static IP addresses that you want to whitelist permanently. Please open the file /var/lib/denyhosts/allowed-hosts. Any IP addresses contained in this file will not be blocked by default.

# vi /var/lib/denyhosts/allowed-hosts

And add each IP address on each line separately. Then save and close the file.

# We mustn't block localhost
127.0.0.1
172.16.25.125
172.16.25.126
172.16.25.127