I was doing a CTF sample, and they gave me the files hash. I ran it through JtR and i got my password for the sample. The thing is, the hash was given to me. Is there a way to find the hash of that file if it wasnt given? There are 2 points that need to be resolved to beat a password. The HASH and the encryption algorithm. I have been practicing with password protected zip files, so i figure it was using zip 2.0 or something or some sort of AES, I can figure that out with the help of google.
I cant find however, is how to access the metadata for the zip file for that Hashed data. Since it is a standard, zipping something doesnt need to have the algorithm in it for when storing the password. HOWEVER, there needs to be some sort sort of hash. Does anyone know how to, with this example of a password protected zip file, know how this is done? Im using a macbook pro right now. Password hashes are not extracted from the file. John the Ripper (JtR) does not really do this.
The purchase of Hash Suite Pro includes upgrades to future 3.x versions (via the same download link that is sent to you upon your purchase). (OpenCL 1.2, 2.0 or 2.
You can download the code for JtR to figure out how it is done. Here is a little article on how to get the so called 'non-hash' info for.zip and.rar files using zip2john and rar2john: To correct the misnomer, JtR does not actually 'retrieve the hash' from the file. It extracts certain information from the file, for example, as documented in the rar2john code: Output Line Format:. For type = 0 for files encrypted with 'rar -hp.' Option. archivename:$RAR3$.type.hex(salt).hex(partial-file-contents):type::::archivename. For type = 1 for files encrypted with 'rar -p.'
Option. archivename:$RAR3$.type.hex(salt).hex(crc).PACKSIZE.UNPSIZE.0. archivename.offset-for-ciphertext.method:type::filename. or.
archivename:$RAR3$.type.hex(salt).hex(crc).PACKSIZE.UNPSIZE.1. hex(full encrypted file).method:type::filename So, as shown above, the 'password hash' is not extracted. Also, it is a complete fail to believe that the file is 'entirely' encrypted (as suggested by others answering similar questions). Instead, critical unencrypted and encrypted file items, such as the salt, are retrieved to generate a 'non-hash'. These items are used by JtR with various password guesses to test decryption. It uses the zip or rar password hash generation functions to create a hash from the guess that is in turn used to generate the crypt key values. The generated crypt key values are then used to test against a small, extracted, and well-defined portion of the encrypted file.
So, while JtR is not 'extracting a password hash' that can be sent to any ol' password-hash-checker-rainbow-table-lookup-thingy, it is doing the next best thing-extracting critical cracking information. The steps to crack are essentially: 1) a hash is generated from a password guess, 2) a few extra steps are added to check that decryption succeeds or fails (a lot of fails), and 3) repeat. What makes rar cracking so difficult is a different salt for each rar file and, more importantly, the large and variable number of hash iterations that are needed before the decryption test can be performed. The newer zip process is similar, but the iterations are not variable-last I checked-making it somewhat easier. This is the nut of 'how it is done' as asked and the answer is 'you don't' get the real password hash of a zip file until just before the file is cracked. The example from the question's CTF exercise is misleading.
The given 'hash' could have been a simple password hash prepared for the exercise to simplify the cracking process for the student by any ol' cracker OR it could have been a specific zip2john 'non-hash' that resulted in a fairly easy password for JtR to guess-short, common, or both. The questioner did not provide a 'hash' or 'hash file' to verify either way. Even though I'm not sure how its done, (JtR) has a little executable (zip2john) that creates a hash out of a zip file. Since the code's open you could take a look at how this is extracted. Of course that's assuming that the file was encrypted with the PKZIP encryption (so it didn't work on files createt by WinRar for example). I tried it on simple files that were zipped with 7zip and where simple passwords were used and JtR equipped with a decent wordlist cracked it in ms.
The (optionally) freely given wordlists did the trick.
Table of Contents. Links Watch video on-line: Download video: Method To crack WPA/WPA2 PSK you need to capture a 'Handshake'.
The best way to this packet the attacker needs to disconnect a connected client currently on the network (if the attacker keeps on repeating this part, it will be a DoS to the user). Once the key packet has been captured, it is time to start an offline dictionary attack. If the network key is in the dictionary, its just a question of waiting to process the dictionary file. From here, the attacker can use that key to decrypt the captured data from before, and now is able to 'read' it as well as join the network. If there isn't a connected client - you cant do this.
If the network key isnt in the dictionary file - you cant do this. You can speed the the cracking process by creating pre-calculated hash files (see results - for how much faster!) Results Software Time (Seconds) Keys Per Second Pre Calculate Time (Seconds) AirCrack-ng 256.2 652.94 0 AirCrack-ng & Airolib-ng 2 65685.4 1162.2 Cowpatty 787.71 205.35 0 Cowpatty & Genpmk 1.25 1297.06 AirCrack-ng & Airolib-ng 1164.2 65685.4 1162.2 Cowpatty & Genpmk 12.06. The dictionary had 311141 lines (3.33M (3,499,543 bytes)). The WPA key on line: 202762. Therefore it had to test 65.1% of the dictionary. Aircrack-ng is better with dictionary attack, whereas coWPAtty & Genpmk is better with Pre-computed hashes (also takes longer to calculate them!) Tools. Aircrack-ng suite.
WiFi card that supports monitor mode. Big dictionary. Processing power Software Name: Aircrack-ng Version: 1.0-rc3 Home Page: Download Link: hxxp://download.aircrack-ng.org/aircrack-ng-1.0-rc3.tar.gz` Name: coWPAtty Version: 4.3 Home Page: hxxp://www.willhackforsushi.com/Cowpatty.html (new: Download Link: Commands.