Feel like cracking hashes?
Hash Cracking
Let’s see if you can figure out what these hashes say. You can choose how. You’ll need to use online tools, Hashcat, and/or John the Ripper. Remember the restrictions on online rainbow tables. Rockyou or online tools should be enough to find all of these.
Question 1. Crack this hash: $2a$06$7yoU3Ng8dHTXphAg913cyO6Bjs3K5lBnwq5FJyA6d01pMSrddr1ZG
Then, I analyzed this hash value.
Then I used “hashcat” in Kali Linux.
In hashcat tool, bcrypt hash code is 3200. You can see this hash code with “hashcat –help” command.
Then I used this command and “rockyou.txt” file for worldlist.
Question 2. Crack this hash: 9eb7ee7f551d2f0ac684981bd1f1e2fa4a37590199636753efe614d4db30e8e1
Question 3. Crack this hash: $6$GQXVvW4EuM$ehD6jWiMsfNorxy5SINsgdlxmAEl3.yif0/c3NqzGLa0P.S7KRDYjycw5bnYkF5ZtB8wQy8KnskuWQS3Yr1wQ0
same method
Question 4. Bored of this yet? Crack this hash: b6b0d451bbf6fed658659a9e7e5598fe
You can use this website to crack this hash value.
Why crack on GPUs?
Graphics cards have thousands of cores. Although they can’t do the same sort of work that a CPU can, they are very good at some of the math involved in hash functions. This means you can use a graphics card to crack most hash types much more quickly. Some hashing algorithms, notably bcrypt, are designed so that hashing on a GPU is about the same speed as hashing on a CPU which helps them resist cracking.
Cracking on VMs?
It’s worth mentioning that virtual machines normally don’t have access to the host’s graphics card(s) (You can set this up, but it’s a lot of work). If you want to run hashcat, it’s best to run it on your host (Windows builds are available on the website, run it from powershell). You can get Hashcat working with OpenCL in a VM, but the speeds will likely be much worse than cracking on your host. John the ripper uses CPU by default and as such, works in a VM out of the box although you may get better speeds running it on the host OS as it will have more threads and no overhead from running in a VM.
NEVER (I repeat, NEVER!) use — force for hashcat. It can lead to false positives (wrong passwords being given to you) and false negatives (skips over the correct hash).
UPDATE: As of Kali 2020.2, hashcat 6.0 will run on the CPU without — force. I still recommend cracking on your host OS if you have a GPU, as it will be much much faster.
To make sure hashing is fully understood, let’s see if you can crack these hashes:
HMACs
HMAC is a method of using a cryptographic hashing function to verify the authenticity and integrity of data. The TryHackMe VPN uses HMAC-SHA512 for message authentication, which you can see in the terminal output. A HMAC can be used to ensure that the person who created the HMAC is who they say they are (authenticity), and that the message hasn’t been modified or corrupted (integrity). They use a secret key, and a hashing algorithm in order to produce a hash.
What’s the SHA1 sum for the amd64 Kali 2019.4 ISO?
http://old.kali.org/kali-images/kali-2019.4/
http://old.kali.org/kali-images/kali-2019.4/SHA1SUMS
http://old.kali.org/kali-images/kali-2019.4/SHA1SUMS
OR
After download kali linux
What’s the hashcat mode number for HMAC-SHA512 (key = $pass)?
You can see this code in this website.
OR