Questions tagged [hashcat]

Hashcat is a program designed to brute force hashes, and is commonly used to crack passwords.

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812 views

hashcat: No hashes loaded

I've been trying Kioptrix: Level 1.1 (#2) and managed to get root access. https://www.vulnhub.com/entry/kioptrix-level-11-2,23/ wolf@linux:~$ nc -vklp 8080 listening on [any] 8080 ... 10.10.10.10: ...
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1answer
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John the Ripper / Hashcat rule, reject candidate if char at position X is the same as character at position Y

I'm using John to generate some word lists and I'm trying to figure out the most optimized way to do the next step. What I want to do is add ever possible 3 digit number to a set where the first digit ...
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3answers
336 views

If my password is not on rockyou.txt does it mean that is a good password?

I have been wondering if all my online and wifi passwords are complex enough. So to test this I was checking if the password was already present on the rockyou.txt wordlist. If the password is not ...
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1answer
92 views

Using DD to get the hash of a non-system partition encrypted by VeraCrypt

I am trying to use DD for Windows to obtain the hash of a non-system partition that was encrypted via Veracrypt, but have run into a bit of a problem. The command I used to get the hash of the ...
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71 views

Bruteforce different encodings

I have a hash $office$*2013*100000*256*16*664f9e0787392c2b1632d3947aaadee4*27dc7d029f76244a407acf9b5afa3740*ebbc055ae08124f6a6be81ef812da4fece16b2ad86eede3916d9cda15f71833f password: лl My wordlist:...
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25 views

Passphrase Cracking Dictionary [duplicate]

I have been discussing this tweet https://twitter.com/marcan42/status/1238125727855206400 and the conversation around it with some folks on an encryption module I am doing as part of a cyber security ...
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1answer
122 views

MD5 PPPoE chap crack

My apartment complex uses PPPoE CHAP authentication for internet (Mikrotik router), I want to switch their provided router with my own, however they aren't willing to give me my password. I have ...
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1answer
322 views

Can't solve format for Salted SHA1 hashes with Hashcat?

I am attempting to understand the format for this Salted SHA1 hash for an assignment. The line of text I was given was: nameExample@email.com,nameExample,nameExample@email.com,nameExample,,,...
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1answer
60 views

Hashcat syntax correction

I've been cracking a box and I came across a password list and another file with the pass configuration. $hash= md5($salt . pass . salt) I have both salts and the password hash. I tried with this ...
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1answer
1k views

Hashcat mask attack getting error “seperator unmatched”

I'm trying to crack the password Ul1234 using hashcat. I created a user with that password in kali and copied the hash in the shadow folder: nils:$6$3q88Up7LX1RFIlRU$...
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1k views

Unable to start hashcat in mode 13600 WinZip : Separator Unmatched

I have a zip file containing a JPEG image of size 3.5 MB, encrypted with AES-256. I used WinZip for the creation of the zip file. In order to create the hash of the zip file, I used John The Ripper's ...
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2answers
79 views

Improving security by altering size of hash strings [duplicate]

So I was thinking, if people get access somehow to your list of hashes, it's easy for them to figure out what alghoritm you used if they have 32, 40, 60 characters etc But what if you slice those ...
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0answers
22 views

How can I crack WPA2 hash with some limitations? [duplicate]

I want to crack an 8 character password, but I know this password doesn't contain more than 4 symbols, 4 uppercase letters, 4 lowercase letters and 4 numbers, and it contains at least 2 symbols, 2 ...
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3answers
2k views

How can I find a SHA-256 hash with a given suffix using hashcat?

Recently we competed in the X-MAS 2019 CTF and many of the challenges included a proof of work (PoW) check to avoid Denial of Service (DoS) attacks against their servers. The most common was we were ...
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69 views

Determining the hash type I am working with for use in hashcat

I am trying to crack some hashed information because the passcode was lost to us. I have the hashed information in the database, and the code that was used to encrypt it. It goes through cryptastic ...
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1answer
470 views

How to use hashcat to crack a password made with openssl-passwd? [closed]

I want use hashcat or John the Ripper to crack the hash of a password. I know the password was created using the following command: openssl passwd -crypt -salt tl ******** The asterisks, of course, ...
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1answer
888 views

new format of keepass (2) database file and hashcat

I created test DB file (.kdbx) using KeePassX, after that used keepass2john Python port from this site, but changed line 88: index += 2 to index += 4 because the size of this field is 4 bytes ...
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1answer
174 views

Hashcat to mask recover variable length password with known suffix

I'm struggling with creating a mask to brute-force using Hashcat a password of variable length, but with a known suffix. Say the known suffix is 123$ but the variable-length "prefix" can contain ...
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1answer
186 views

Hashcat custom mask - brute force 12 length passwords with 1 capital letter, 1 number and 10 lowercase letters

I need to use brute force to crack the password. I know about the password that it has exactly 1 capital letter (A-Z), exacly 1 number (1-9) and exacly 10 lowercase letters (from a to z). I have ...
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1answer
49 views

Is it beneficial to know the first char of a wpa2 hash [duplicate]

All I will need to check is AAAAAAAA - AZZZZZZZ. So I will only have to check the A's but will checking the A's be faster knowing the first char , I can't see why it would be as it would have to ...
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1answer
549 views

How long to crack an 8 character WPA2 hash if first char is known

I know the first char is A and it's all upper alphanumeric. Is there a way to estimate how long a mid level single GPU using hashcat would take to crack it?
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1answer
2k views

Combined-Dictionary attack with hashcat, for 4 words passphrases?

Reading the new advice on password which seems to spead easily (at least in my workplace), I was wondering how to use hashcat for cracking four-word password hashes? Say I have this hash ...
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1answer
204 views

XVWA PBKDF2 with sha256 and 1000 iteration

In XVWA (Xtreme Vulnerable Web Application) I presented with an PBKDF2 with sha256 and 1000 iteration as such: <?php function create_hash($password) { // format: algorithm:iterations:salt:...
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1answer
106 views

Can't figure out input format for Hashcat salts with odd characters in salt

I have passwords that are stored by: Generating a random, 36-character "string" in the range of CHAR(1) to CHAR(256) Appending this to the entered password Retrieving the SHA512 hash of the result ...
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1answer
3k views

Estimating Password Cracking Speed Based on GPU?

I was wondering if there was a calculator or formula I could use to find a rough estimation of the time it takes to crack hashes based on GPU. I am trying to assess how much performance I would lose/...
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1answer
14k views

I found a password with hashcat, but it doesn't work

My assignment required me to find the password for a PowerPoint file (97 - 2003, v. 8.0 - v. 11.0). I used office2john.py to retrieve the hash, and I removed the file name. The hash is: $...
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1answer
121 views

Can we implement custom algorithms to encode and decode wifi password hashes between Windows 10 and our Router?

Windows 10 has its own way of encrypting hashes, but these can be brute-forced by hashcat. One of our students created 2 of his own password encryption algorithms in python (One for encode, one for ...
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1answer
383 views

Limiting the number of duplicate character types in crunch

I'm trying to generate a password list of 10 character passwords containing only a combination of 3 - 6 numbers and 3 - 6 uppercase letters. I see option -d which allows a set limit of duplicates of ...
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1answer
698 views

Iterated salted sha256 hashes hashcat

I have a hash which was generated by concatenating a password to a salt, then repeating hashing 10000 times. The description for salted sha256 in the output of hashcat -h is 1410 | sha256($pass.$...
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1answer
3k views

Hashcat - separator unmatched running pmkid 16800 crack

I'm working on cracking a pmkid file. I have collected pcap file using bettercap. Then convert using this: hcxpcaptool -z bettercap-wifi-handshakes.pcap.pmkid bettercap-wifi-handshakes.pcap They ...
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1answer
3k views

Advice to help crack MD5crypt hash

I've been given a homework task to crack a particularly difficult password on a Unix system. I have found users and hashes in the etc/shadow file and cracked all but this one: $1$TyPfW4pp$...
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1answer
488 views

Benchmark Password Cracking Tools

I want to perform a benchmark for the most popular offline password cracking tools (john the ripper and hashcat)? What metrics or approach should i take about benchmarking in order to determine what ...
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1answer
6k views

hashcat - cracking a salted sha256

Given a SHA512 hash, a salt, and username I am trying to crack the hash using hashcat. Every example I've found used a hashfile as input, is there way to provide salt and hash via commandline without ...
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1answer
93 views

Multicore hacker tools?

Have a school project coming up in multicore programming. I'm interested in/have used hacking tools alot before, and was wondering if there were any good tools out there that could benefit from being ...
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2answers
262 views

Hashcat Mask Help

I'm wondering on how to run hashcat against wpa2 passwords that are in the following format: common dictionary word . three digits . common dictionary word Password Example: falcon.824.watchman Is ...
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1answer
4k views

hashcat specify number of characters

I am trying to figure out a macOS hash 10.8+ and I happen to know that it uses A-Z, a-z, 0-9, is 6-8 characters, and almost certainly random. Currently, it spits out an error regarding hash length ...
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1answer
99 views

Recover SHA1-encoded email addresses

Say you have a list of SHA1 hashes which are all encoded with the same salt. All of these are email addresses and you know at least one combination of hash and email address. Is it possible to use a ...
3
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1answer
8k views

Using hashcat in order to crack the JWT signature in WebGoat

I've recently started to practice my penetration testing skills and I got started with WebGoat. I got to the "Authentication Bypass" chapter, to the JWT Token cracking. WebGoat presents this JWT ...
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1answer
436 views

Using hashcat for collision attack [closed]

Whenever i tried generate √N randomly(possible combinations of password length), i always find few collisons of the hash password no matter the length, if the password was made of entirely random ...
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1answer
1k views

Brute force MD5 with a prefix and suffix up to n characters/words

I have a couple of things I would like to explore with hashcat. I have a MD5 hashed password, which I know for a fact has a prefix and a suffix. The actual password is located in the middle of the ...
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1answer
563 views

Hashcat bruteforce define digit range form and to

I know this password is between 90,000,000 and 500,000,000 how can I tell hashcat to bruteforce exactly in that range? I mean starting from 90,000,000 and ending at 500,000,000 I go the password ...
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0answers
485 views

How to mask attack a sha256 hash with following information using hashcat?

I am hashcat newbie and I want to crack a hash :) The answer is 1-15 (unknown) characters and it may contain 'a-z' 'A-Z' '0-9' and '_' . (A Twitter username) How may I mask attack a hash with above ...
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1answer
1k views

Hashcat: How to discard words of length less than N after rules have been applied?

Hashcat: How to discard words of length less than N after rules have been applied? I know of the rules <N and >N that discards the word if its length is less than and greater than N, ...
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3answers
15k views

Hashcat doesn’t write to output file [closed]

I am using hashcat to crack a list of md5 hashes and have used the following command hashcat -m 0 -a 0 -o out.txt --force hashdump.txt ../rockyou.txt which gives the output Session..........: ...
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1answer
1k views

hashcat specific brute force

Is this scenario possible: I know the first three letters of the password (exact), i know the password is between 10-14 characters, i know the rest of the characters are "b,t,p,1,3,6,7" which can be ...
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1answer
316 views

Where can i find a pre-computed 8 caracter uppercase password file/dictionary

To create an all permutations dictionary of an 8 character uppercase only password, I get I can use crunch to make this wordlist and file would roughly be 1.8 - 2Tb in size. Is there anywhere I can ...
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1answer
1k views

Mitigating the new attack on WPA2 involving PMKID

A new attack was discovered which allows cracking a WPA2 passphrase without needing to capture the 4-way handshake. While this doesn't weaken the password itself, it does mean that an attacker can ...
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3answers
13k views

Is it possible to crack any SHA1 hashed password

I'm trying to understand how easy it is to crack a SHA1 hashed password. I have a training database giving hundreds of password hashed. I have tried to use some online tools to crack them and I have ...
0
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1answer
893 views

How to configure hashcat to only hash fixed length passwords with N digits?

I know of mask and dictionary attacks. Using a mask attack, I specify the charset for each position in the password pattern, e.g., ?1?1?d?1?d?1?1?d, where ?1 := ?l?u?s. But how do I tell hashcat to ...
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2answers
2k views

How to crack forgotton KeePass password when knowing most of the password

A few days ago I changed my KeePass password and forgot it unfortunately. It isn't that much different from the previous one, but I kept trying and trying and it says it's incorrect I found https://...