Questions tagged [password-cracking]
for questions relating to the cracking of passwords and the practices to mitigate against passwords being cracked.
730
questions
-1
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0answers
23 views
Brute force Blowfish Advanced CS password
In my perhaps somewhat excessive need for security, I have saved a password so securely that I can no longer access it myself.
My files have been encrypted with Blowfish Advanced CS. Fortunately, this ...
0
votes
1answer
288 views
How does john the ripper crack ssh private key passphrases?
How does John The Ripper work when trying to crack passphrase of a private ssh key? What steps are involved when it tries to do so? What's the role of ssh2john in the whole process?
1
vote
1answer
53 views
In hashcat, is there a simple way to set the amount of symbols in the password?
For example, I know a password has to have at least 3 symbols, but I don't know where those symbols are. What is the simplest way to specify this when cracking the password with hashcat? The only ...
2
votes
1answer
4k views
Decrypting a password-protected 7z file with Delta filter fails
I have made a 7z archive using Delta filter containing a wav file and I have protected it with a password. I am running a terminal in Kali Linux. My problem is that I cannot get the password cracked ...
2
votes
1answer
4k views
PMKID found , but it should be WPA handshake
i was trying to get access in wifi network but i came to something that i need to ask afteraireplay-ng –0 20 –a [router bssid] –c [client bssid] wlan0mon i expect
WPA handshake
in right top ...
0
votes
1answer
12k views
Simple Hydra test with Windows RDP
I am using VMware and have 3 VMs all on the NAT network with DHCP. All three machines can ping each other. From one windows to the other windows, I can RDP into the 192.168.190.130 windows machine ...
1
vote
1answer
107 views
Does the random presence of a common password sequence within a larger password weaken the password?
I have a somewhat basic understanding of how entropy relates to password strength - generating a password with a truly random selection from some set (whether that's characters, or a set of dictionary ...
5
votes
1answer
2k views
BIOS Password vs. BitLocker Pre-boot PIN
I'm attempting to ensure maximum security for my PC. I'm running Windows 10 Pro on a business-class HP notebook.
Unless I'm mistaken, I understand that both a BIOS password and the BitLocker pre-boot ...
2
votes
1answer
249 views
What is the minimum secure length for gpg -c file.txt?
I want to use gpg -c with a user-generated password that I can easily remember. Are 16 characters enough? for example would a password similar to "I own 32 houses." be bruteforcable?
1
vote
2answers
24k views
Most efficient way to crack a NTLM hash
I've been given a non-salted NTLM hash and a week worth of time to find the password it hides. I have also been told the password length is 11 chars, and that it is a Windows 10 user password.
I'm ...
7
votes
1answer
5k views
Attack WPA password with hashcat - Settings and resources for "german" passwords?
I'd like to prove to a friend of mine that his wifi is insecure and learn something about password cracking on the way. The guy I am talking about does not believe in strong passwords but in SSID ...
0
votes
1answer
66 views
Cracking hashes of trivially modified passwords
If I started with “password”, then change it to “password2”, “password3” etc, is that easier to crack the hashes of the set of passwords than if I used only the original password?
Does having the ...
5
votes
1answer
10k views
John the Ripper - Calculating brute force time to crack password
I'm using incremental mode (brute force) mode in John the Ripper to crack Linux MD5 passwords. I'm trying to calculate the time it will take to run through all combinations of 12 passwords (with 12 ...
0
votes
1answer
111 views
pwdump8-8.2 correct hash for Microsoft Account Win10
I am having a real issue cracking one NT hash i've pulled from my system for a Microsoft Account.
I used - PwDump8.2
I have an admin account unlocked on the system and can access most files.
I know ...
0
votes
1answer
8k views
Hydra cannot connect to http-post-form
I don't get the correct results and I'm not sure what I'm doing wrong:
$ ./hydra -l admin -x 3:9:a http://localhost http-post-form "/admin/login:j_username=^USER^&j_password=^PASS^:failed&...
0
votes
1answer
83 views
Creating Wordlist from specific characters and numbers using Mentalist or similar program
I have locked myself out of my Win 10 Microsoft account by forgetting my password and need to get back into it. I have extracted the hash for the account.
I've been researching wordlists and hash ...
0
votes
1answer
466 views
John the ripper - ecryptfs - sample not cracked: 0 password hashes cracked
I tried to use john the ripper on the sample :
ecryptfs_sample_metadata.tar (password is 'openwall')
Which I downloaded from here:
https://openwall.info/wiki/john/sample-non-hashes
If i try
sudo ...
1
vote
1answer
5k views
Brute-Forcing DVWA login page with hydra
I'm learning how to brute force web login pages with a popular brute force tool called "Hydra". I'm using Kali Linux (VirtualBox) to do this. I've installed DVWA (Damn Vulnerable Web Application) and ...
2
votes
2answers
2k views
Does john the ripper not support yescrypt?
I'm learning about password attacks using john and am trying to use it for bruteforcing my shaddow file. I created a user called newuser with password stuff and then used
sudo unshadow /etc/passwd /...
1
vote
1answer
174 views
Opening password file with John The Ripper
I have an old Windows domain SMB sniffer file circa 1998 and just out of interest I want to see if I can crack it now with John The Ripper. I believe the file was generated using the L0phtCrack SMB ...
0
votes
0answers
84 views
Windows 10 user autologin password lost
A while ago I have set up the autologin for my Windows 10 user.
I do not know the password anymore.
I can login to the system (as has autologin now). But I cannot change the password.
Is it possible ...
13
votes
4answers
40k views
John the ripper is not identifying hashes
I'm attempting to use JTR against a password protected zip. I have created the hash file using:zip2john filename.zip > filename.hash and i get a successful output:file.txt is using AES encryption, ...
1
vote
1answer
2k views
John the Ripper Custom Dynamic Hash Function Usage
I have created a custom dynamic hash function comprised of a series of different existing hash functions chained together. I'll spare you the exact details because it's for a class assignment.
I've ...
0
votes
1answer
282 views
routersploit bruteforce cred attcack using http
while i'm trying to do a brutforce attack on my router using routersploit.
Im getting the error
rsf (HTTP Basic/Digest Bruteforce) > run
[*] Running module creds/generic/...
1
vote
2answers
213 views
Security of master password in a derived password manager
I am aware of other questions asking similar things as this one, but I believe this design addresses many of the issues raised in those questions. I'm also not concerned with making sure there's no ...
2
votes
1answer
971 views
How do Field Programmable Gate Arrays (FPGAs) compare to Graphics Processing Units (GPUs); for cracking hashes?
As a general rule, GPUs are more effective than CPUs when it comes to performing acutely repetitive tasks, like iterating over lists and generating permutations of a set (i.e. exhausting dictionaries &...
0
votes
0answers
58 views
crackmapexec continue after finding first match
I am currently trying to solve the RazorBlack room on tryhackme. After enumerating the machine, I created a list of valid usernames and was also able to crack the password of one of the users. Now I ...
14
votes
4answers
59k views
Bypassing Windows 10 password with Utilman.exe trick - fixed?
Recently I run into a locked down laptop with Windows 10 OS (actually I guess it was updated from Windows 7 if that matters). My collegue was using this computer some time ago and lost his login and ...
1
vote
1answer
162 views
THC Hydra sends GET request without parameter before actual request with parameter which causes authentication problems
I am using THC Hydra (v9.0) on GNU/Linux to pentest my private API.
The GET route in question requires a key as GET parameter which returns an auth token if the correct key was submitted else "...
1
vote
1answer
1k views
WPA/PSK Dictionaries
I have been reading some articles on WPA/PSK encryption and one said that the hash is calculated like this:
Key = PBKDF2(passphrase, ssid, 4096, 256)
Where PBKDF2 is a standardized method to derive ...
5
votes
3answers
21k 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 ...
7
votes
2answers
42k views
How to crack `salt + SHA256(salt + password)` hashes with JTR?
I have a set of password hashes.
Here is an example:
9e74437e97ff201ff38416138a22a7f3adfa3b9c10e947481bd94b16eed7df6b6e2806
From the source code of the application generating this hash I learned that ...
0
votes
1answer
1k views
John the ripper not able to crack the password
I generated two hashes from this site:
Plaintext 1 (p1): world
Salt 1 (s1): hello
Hash 1 (h1): 936a185caaa266bb9cbe981e9e05cb78cd732b0b3280eb944412bb6f8f8f07af
Plaintext 2 (p2): world2
Salt 2 (s2)...
2
votes
3answers
268 views
To lighten server load, is hashing a client-side Argon2-hashed password with SHA-256 on the server-side at least as safe as server-side only Argon2?
I am trying to achieve better security in my authentication system implementation with both server-side hashing and client-side hashing. (See the first reference below for more prerequisite knowledge.)...
1
vote
3answers
177 views
Does hashing syslog (or similar) make for good passwords?
I thought of an approach to password generation that I haven't heard of anyone else using. It almost seems too good to be true so I wonder what the downsides are. I'm well aware that you shouldn't &...
2
votes
1answer
525 views
How to interpret the attempt information from Hydra
I was performing a Hydra attack on my TP-Link router and for that I prepared a passwords.txt file with 288 passwords.
hydra -l webadmin -P test_creds/passwords.txt xxx.xxx.xxx.xxx ftp
A minute ...
0
votes
0answers
338 views
Speed up cracking a wpa2.hccapx file in hashcat
I'm trying to do a brute force with Hashcat on windows with a GPU cracking a wpa2.hccapx handshake. Based on my research I know the password is 10 characters, a mix of random lowercase + numbers only
...
1
vote
1answer
112 views
Backup + AES-128 encrypted file in Cloud sync
I've some data that I want to backup to the cloud. I also have a file containing personal data, that I need to sync across multiple devices.
At the moment, for this file, locally in my computer, I've ...
1
vote
1answer
231 views
Cracking Lost Password for encrypted 7z file with most characters known
I forgot password to 7z archive encrypted with AES 256. I am fairly certain of most characters however. I know password length is either 8 or 12 characters and if it is 12 I know the last 4 characters....
5
votes
1answer
18k views
John the ripper passwd file format with salt not working
I'm trying test password strength in one of our e-commerce sites. I'm using john the ripper to brute-force a password file. The algorithm used by PHP is:
$hash = md5($salt . $pass)
No other ...
0
votes
1answer
77 views
If a platform/system has brute force protection should I care for a very strong password
If a platform has brute force protection should I worry about creating a very strong password since any attacker would not get a chance to reach enough attempts to crack even the weakest password?
Not ...
7
votes
2answers
51k views
show previously hacked passwords with John The Ripper
I tried to crack my windows passwords on the SAM file with john the ripper, it worked just fine, and it shows me the password. But when i try to hack the same file again, john just tells me :
Loaded ...
4
votes
2answers
30k views
NTLM/LM Hashes on Domain Controller
I've noticed that when extracting password hashes from a domain controller (using Elcomsoft proactive password auditor) sometimes I'll get LM and NTLM hashes and other times I'll only get NTLM hashes.
...
-1
votes
1answer
143 views
What are the security implications of the password policy for this bank? [duplicate]
I am aware of a bank (redacted for obvious reasons) that has the following password policy.
Only English alphanumeric characters
Min of 8, max of 14 characters
No special characters (ex. !@#$%^&* ...
0
votes
1answer
408 views
I have been hacked on Facebook multiple times today alone. What do I do?
My Facebook account has had its password changed four times today, and I'm wondering what to do.
The first time, was at 5:02pm. I received an email saying that my password had been changed. I recently ...
1
vote
1answer
119 views
PAKE - What to do when a weakness is found?
In the case of a password hashing function like Argon2, I know that when a weakness is found, you use another password hashing function, wrap it around the existing hashes and calculate the hash of ...
1
vote
1answer
167 views
What's the point of connecting to another machine with SSH to crack a password?
If anyone has heard of Ippsec and watched his videos, you'll see that when he extracts a password hash from a machine, he doesn't crack it in his own computer, rather, he uses SSH to connect to his ...
1
vote
1answer
3k views
John the Ripper is unable to crack my SHA1 hashed password
John the Ripper is unable to crack my SHA1 hashed password:
john --wordlist=rockyou.txt testing.txt
Whenever I do this in Kali Linux, I get this response:
Loaded 1 password hash (Raw-SHA1 [SHA1 256/...
0
votes
2answers
578 views
Does John the Ripper automatically account for salt and hash?
I have an embedded device running Armbian which I was able to get the drive image from. The entry in /etc/shadow combined with /etc/passwd after unshadowing is this:
root:$6$TV6ML2bG$TncnN/adtU9xaQs/...
0
votes
1answer
1k views
Generate every alphanumerical combination in crunch within 8-20 characters in length
I want to generate combinations in sequential range of the length 8-20 with the following characters:
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*()~`";.,/[]-=
How ...