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Hashcat tutorial for beginners [updated 2021] How to unhash DB
LIKE MY POST IF YOU LIKE THE METHOD ! How to crack hashes
The simplest way to crack a hash is to try first to guess the password. Each attempt is hashed and then is compared to the actual hashed value to see if they are the same, but the process can take a long time.
Dictionary and brute-force attacks are the most common ways of guessing passwords. These techniques make use of a file that contains words, phrases, common passwords and other strings that are likely to be used as a viable password.
can be downloaded https://hashcat.net/hashcat/. It can be used on https://www.kali.org/ and is pre-installed on the system. It possesses the following features:
How to crack a password via a dictionary attack
1. Create a dictionary with MBD5 hashes
To start this demonstration, we will create multiple hash entries containing several passwords.
In detail, they will then be outputted to a file called “target_hashes.” Each command should be executed in the terminal, as demonstrated below:
echo -n “Password” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “HELLO” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “MYSECRET” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “Test1234″ | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “P455w0rd” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “GuessMe” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “S3CuReP455Word” | md5sum | tr -d ” -” >> target_hashes.txt
The -n option removes the new line added to the end of “Password.” This is important as we don’t want the new line characters to be hashed with our password. The part “tr –d ‘ -‘ “ removes any characters that are a space or hyphen from the output.
2. Check password hashes
To do this, we need to type the following command line in the terminal:
cat target_hashes.txtThis is also illustrated in the table below:
root@kali:~/Desktop# cat target_hashes.txt
dc647eb65e6711e155375218212b3964
eb61eead90e3b899c6bcbe27ac581660
958152288f2d2303ae045cffc43a02cd
2c9341ca4cf3d87b9e4eb905d6a3ec45
75b71aa6842e450f12aca00fdf54c51d
031cbcccd3ba6bd4d1556330995b8d08
b5af0b804ff7238bce48adef1e0c213f
3. Start Hashcat in Kali Linux
Hashcat can be started on the Kali console with the following command line: hashcat -h.
This is illustrated in the screenshot below:
https://resources.infosecinstitute.com/wp-content/uploads/2018/04/122120-2.png]4. Choose the wordlist
Kali Linux has numerous wordlists built right into it. To find them, use the following command line: locate wordlists
This is illustrated in the screenshot below:
https://resources.infosecinstitute.com/wp-content/uploads/2018/04/122120-4.png]5. Cracking the hashes
In the final step, we can now start cracking the hashes contained in the target_hashes.txt file. We will use the following command line, as illustrated below:
root@kali:~/Desktop# hashcat -m 0 -a 0 -o cracked.txt target_hashes.txt /usr/share/wordlists/rockyou.txt
Finally, we have cracked five out of seven target hashes that were initially proposed. These can be seen below:
root@kali:~/Desktop# cat cracked.txt
dc647eb65e6711e155375218212b3964:Password
eb61eead90e3b899c6bcbe27ac581660:HELLO
75b71aa6842e450f12aca00fdf54c51d:P455w0rd
2c9341ca4cf3d87b9e4eb905d6a3ec45:Test1234
958152288f2d2303ae045cffc43a02cd:MYSECRET
These passwords are weak, and it does not take much effort or time to crack them. It is important to note that the simpler the password is, the easier it will be to detect.
LIKE MY POST IF YOU LIKE THE METHOD ! How to crack hashes
The simplest way to crack a hash is to try first to guess the password. Each attempt is hashed and then is compared to the actual hashed value to see if they are the same, but the process can take a long time.
Dictionary and brute-force attacks are the most common ways of guessing passwords. These techniques make use of a file that contains words, phrases, common passwords and other strings that are likely to be used as a viable password.
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resources.infosecinstitute.com
- Lookup tables: Hashes are pre-computed from a dictionary and then stored with their corresponding password into a lookup table structure.
- Reverse lookup tables: This attack allows for a cyber attacker to apply a dictionary or brute-force attack to many hashes at the same time without having to pre-compute a lookup table.
- Rainbow tables: Rainbow tables are a time-memory technique. They are similar to lookup tables, except that they sacrifice hash cracking speed to make the lookup tables smaller.
- Hashing with salt: With this technique, the hashes are randomized by appending or prepending a random string, called a “salt.” This is applied to the password before hashing.
can be downloaded https://hashcat.net/hashcat/. It can be used on https://www.kali.org/ and is pre-installed on the system. It possesses the following features:
- It is multi-threaded
- It is multi-hash and multi-OS based (Linux, Windows and OSX native binaries)
- It is multi-Algorithm based (MD4, MD5, SHA1, DCC, NTLM, MySQL, etc.)
- All attack modes can be extended by specialized rules
- It is possible to resume or limit sessions automatically. They recognize recovered hashes from the outfile at startup
- It can load the salt list from the external file. This can be used as a brute-force attack variant
- The number of threads can be configured and executed based on the lowest priority
- It supports both hex-charset and hex-salt files
- The 90+ algorithms can be implemented with performance and optimization in mind
How to crack a password via a dictionary attack
1. Create a dictionary with MBD5 hashes
To start this demonstration, we will create multiple hash entries containing several passwords.
In detail, they will then be outputted to a file called “target_hashes.” Each command should be executed in the terminal, as demonstrated below:
echo -n “Password” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “HELLO” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “MYSECRET” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “Test1234″ | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “P455w0rd” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “GuessMe” | md5sum | tr -d ” -” >> target_hashes.txt
echo -n “S3CuReP455Word” | md5sum | tr -d ” -” >> target_hashes.txt
The -n option removes the new line added to the end of “Password.” This is important as we don’t want the new line characters to be hashed with our password. The part “tr –d ‘ -‘ “ removes any characters that are a space or hyphen from the output.
2. Check password hashes
To do this, we need to type the following command line in the terminal:
cat target_hashes.txtThis is also illustrated in the table below:
root@kali:~/Desktop# cat target_hashes.txt
dc647eb65e6711e155375218212b3964
eb61eead90e3b899c6bcbe27ac581660
958152288f2d2303ae045cffc43a02cd
2c9341ca4cf3d87b9e4eb905d6a3ec45
75b71aa6842e450f12aca00fdf54c51d
031cbcccd3ba6bd4d1556330995b8d08
b5af0b804ff7238bce48adef1e0c213f
3. Start Hashcat in Kali Linux
Hashcat can be started on the Kali console with the following command line: hashcat -h.
This is illustrated in the screenshot below:
https://resources.infosecinstitute.com/wp-content/uploads/2018/04/122120-2.png]4. Choose the wordlist
Kali Linux has numerous wordlists built right into it. To find them, use the following command line: locate wordlists
This is illustrated in the screenshot below:
https://resources.infosecinstitute.com/wp-content/uploads/2018/04/122120-4.png]5. Cracking the hashes
In the final step, we can now start cracking the hashes contained in the target_hashes.txt file. We will use the following command line, as illustrated below:
root@kali:~/Desktop# hashcat -m 0 -a 0 -o cracked.txt target_hashes.txt /usr/share/wordlists/rockyou.txt
- -m 0 designates the type of hash we are cracking (MD5)
- -a 0 designates a dictionary attack
- -o cracked.txt is the output file for the cracked passwords
- target_hashes.txt is our input file of hashes
- /usr/share/wordlists/rockyou.txt is the absolute path to the wordlist file for this dictionary attack
Finally, we have cracked five out of seven target hashes that were initially proposed. These can be seen below:
root@kali:~/Desktop# cat cracked.txt
dc647eb65e6711e155375218212b3964:Password
eb61eead90e3b899c6bcbe27ac581660:HELLO
75b71aa6842e450f12aca00fdf54c51d:P455w0rd
2c9341ca4cf3d87b9e4eb905d6a3ec45:Test1234
958152288f2d2303ae045cffc43a02cd:MYSECRET
These passwords are weak, and it does not take much effort or time to crack them. It is important to note that the simpler the password is, the easier it will be to detect.