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Questions tagged [brute-force]

An attack using every possible input to attempt to produce the correct output. Typically the method of last resort when no weakness allows the use of a more restricted input set. E.g. trying all possible (or likely) passwords, in an attempt to guess the correct one.

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1answer
232 views

NMAP NSE script stopping after 900 seconds (15 minutes)

I am experimenting with ssh bruteforce over my home network using the ssh-brute nse script. I have a short list of usernames (just 12) but a long list of passwords (1M). I can't seem to get the ssh-...
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2k views

THC Hydra on Windows RDP Domain

I am testing a bruteforce on a windows rdp server within a domain. It seems to not be working because nothing is locking out the account I am targeting. How do you specify a domain username? I tried ...
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621 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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234 views

Review on encrypted data storage algorithm

I'm building a small command line tool (mostly for fun) that is meant to store data (such as passwords or files) encrypted into a local database, with a user supplied password, pretty much the same ...
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1answer
138 views

if salt stored in user, will it be possible to use brute force attack? [duplicate]

I had done a lot of research about this topic. Before Researchs I found that some people suggest that to hide salt is not important: https://crackstation.net/hashing-security.htm But also this ...
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3answers
305 views

Can ModSecurity defend from Brute Force Attacks on PHPmyadmin and WordPress as well?

Can the software ModSecurity defend from Brute Force Attacks on PHPmyadmin and WordPress as well? A particular hosting company providing shared hosting told me that ModSecurity should cover ...
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1answer
355 views

RDP Audit Failures Brute Force Attacks

I need some help on tracking the source of these RDP access attempts on our terminal server. Port 3389 is open on the firewall (I know this is a terrible practice. I don't want to hear advice on ...
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1answer
1k views

Efficient Way to Brute Force With Large Wordlist

I am considering attempting to perform an SSH brute force attack on my own device in order to test its security, but I have run into an issue with the wordlist. I know my own password format, as well ...
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93 views

Experiencing injection / brute force attacks

I'm handling a hosting services for website via WHM. Few months ago, I've been experiencing some automated attacks on the websites that I'm handling. See screenshots below: Are there any remedy for ...
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1answer
336 views

Some questions about protecting recovery seed for Trezor/Nano S

If someone stole recovery seed (24 words) but you would protect it with additional passphrase, is it likely they could brute force your passphrase? How many guesses can there be made per second? ...
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2answers
468 views

Key(session token) authentication vs default login/pass authentication

I am building web application and have an idea to build custom authentication system, which would be quick and secure. I do not want to use almost "default" login (email) / password combination. I ...
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1answer
318 views

Setting payload for email using burp intruder [closed]

I am setting up the burp intruder attack for email. For example, youremail@gmail.com Now when i added $ it takes youremail@gmail%2ecom so i am getting the result as email is invalid type. My aim is ...
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1answer
1k views

Brute force web page using Hydra [closed]

What is the problem in this command for hydra, it returns these errors: Command : hydra -l 950421521 -P /home/jarvis/Desktop/ams-2.lst 172.20.10.4 http-post-form "/login.aspx:&txtUserName=^USER^&...
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2answers
1k views

How customising a wordlist to make a bruteforce attack in leetspeak with hashcat or John the ripper

I'm trying to unlocking my encrypted external harddisk because I have lost my paper with the password. With the help of user3439894 I have a short program to injecting a wordlist and unlocking the ...
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1answer
446 views

Robots trying to login to Azure VM when SSH port is closed in manager

I have many robots trying to do SSH login in a Azure VM. In the resource manager SSH is disabled but attacker IPs are public, as you can see below, where I copy a log for auth.log (I have an Ubuntu ...
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1answer
286 views

Why IOS on IPhone cannot be brute-forced programatically? [duplicate]

I am interested in the recent Apple case where FBI wants to get access, but they say it's not technically possible other than creating a new OS (or I guess just modifying the existing one). More ...
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3k views

Brute forcing using hydra

I'm try to do brute force attack on a system and I have complete word list of the possible passwords because they use a really simple format but when I tried hydra with the following post responses, ...
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1answer
251 views

Prevent brute force attacks on web publishing logins

Presumably, if someone tries to brute force into your website's control panel at your web host's site - they will be throttled/locked-out etc. But what about the web publishing logins (Web-Deploy, ...
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2answers
1k views

How to prevent ddos and brute-force attack by restricting IP's on Wordpress website

I want to make wp-login.php and/or wp-admin accessible only from one country. If I want wp-login.php access only from USA then my approach from .htaccess is like below <Files wp-login.php> ...
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2answers
806 views

User Account Guessing [duplicate]

I'm doing some research on user account guessing, and wanted to ask a question about some "bad practices". My thought is generally this is a trade-off between great user functionality/UX and security....
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2answers
476 views

Showing CAPTCHA

I'd like to show a CAPTCHA to prevent brute forcing attempts, but I was thinking of showing it whenever a user fails for an invalid username/password combination after X attempts, regardless of ...
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1answer
95 views

Find hash-function if original and hash are given? [duplicate]

I was thinking whether or not you can find the hash function(s) used if you have the original message and the hash. So assume that no salt is used during the hashing process, just multiple hashing and ...
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1answer
56 views

Does restarting an encrypted session increase security and deter attacks?

When a user initiates a SSH connection for example, keys are exchanged and a session is established with a new "passphrase" each time. If an attacker were to attempt to brute force this connection, ...
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44 views

Hydra - Brute force command is stalling

Very new to application testing here. I am working through the hacker101 CTF (petshop) examples and I am having problems with brute forcing a username form with Hydra. The error message looks like it ...
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32 views

Bruteforce directory with Burp : 2 parameters used in 3 step macro for intruder

I try to bruteforce paths with Burp intruder but to do so I have to be authenticated and have a valid CSRF token (transmitted as a GET parameter). So what I want to do is : Call the login page to ...
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0answers
43 views

How to create custom brute force dictionary with all digits 0000-9999 with characters before and after? [closed]

I want to mess around with some brute force stuff. I made a fake login and I want to see if I can create a dictionary that will brute force my own password using only a generic pattern. The pattern ...
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32 views

How to brute force pgp private key or pgp message? [closed]

I forgot my pgp private key passphrase and wanna brute force either my private key or the message is encrypted with my public key. Is there any way to brute force it? Do you think JohnTheRipper ...
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30 views

How hackers bruteforce web logins when password attempts are limited? [duplicate]

I read about password brute force attacks, but I wonder how hackers try this attack when developers limit password attempts.
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0answers
61 views

How to make wfuzz perform a request to retrieve CSRF token to include in the main request?

How to make wfuzz perform a request to retrieve CSRF token to include in the main request? I've previously used patator, which includes the options before_url and before_fgrep for performing a ...
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16 views

Password checking implementation: delay on unsuccessful attempts [duplicate]

What would be wrong with the username/password checker where the response is instantaneous for valid attempts but a pre-built time delay (say 1 sec) is used for unsuccessful ones? It would not slow ...
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1answer
31 views

NCrack bruteforcing for http-get using -iL options

How to do NCrack bruteforcing for http-get service using -iL (mass scan) options where server is having different port.
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49 views

Remote Desktop compromised

So roughly 2 weeks ago my Remote Desktop was compromised whilst I was actively interacting with my server via Rdp I was prompted with a disconnect status equal to “ Another user has connected to ...
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60 views

How long will it take to crack a hashed random string

If I generate 128 bit, 512 bit and 1024 bit random strings using either: A native rand() function (C, PHP, Python, etc) OpenSSL random bytes Hardware generated random number And hash the random ...
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24 views

Does the Loginizer WordPress plugin also limit XML-RPC-calls?

I learned about about XML-RPC and specifically XML-RPC in WordPress. Now, the safety of XML-RPC in WordPress this is disputed. But given, that I would like to continue using XML-RPC, in the most save ...
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28 views

PEAP MS-CHAPv2 brute force attack

I have a 802.1x switch and a client authenticated using PEAP-MS-CHAPv2. I sniffed the traffic using a HUB between the client and the switch. How can I use the captured informations to perform a brute-...
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24 views

How secure will it be to use “Google Docs long url” like authentication scheme for orders in my online shop? [duplicate]

For the sake of simplicity, instead of full-fledged authentication with login and password, I want to create "Google Docs long url" authentication scheme for my internet shop for the users. To let ...
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1answer
73 views

How to create combinations of a password [duplicate]

I don't remember my password, I can't remember exactly the variation. How can I brute force all the permutations of a word knowing the following conditions: Idea of the word (in my mind). Lower and/...
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1answer
642 views

Using THC Hydra to attack Cisco router

I am trying to do successfull attack on my cisco home router using THC Hydra. I already know a username/password(admin/admin). First with nmap I looked for open ports on router and only opened one ...
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1answer
306 views

What are the common features to identify Brute-Force attack from Apache log file?

There are various methods to find attack patterns for different types of attacks. Apache-scalp is one such tool, but the rule set is not available to find the brute-force attack pattern via regular ...
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1answer
233 views

Program for guessing a url [duplicate]

I had an old soundcloud account where i privated one of my songs. After many years, I would like to listen to the track, but i don't remember what email was linked to the account or the password. All ...
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0answers
309 views

Can a smartphone's PIN or password be brute-forced in an offline attack?

I know of exhaustive offline dictionary and brute-force attacks against any given online account, but can the same method be applied against phones, either Android/iPhones? Or would any such attack be ...
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38 views

Generate a wordlist with strings that have no repeated characters [duplicate]

I am attempting to do this with crunch, but any method would be fine. I want to generate combinations of 6 characters in which no character is repeated. Note that I don't mean the -d function, as that ...
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46 views

How to generate a bruteforce list? [duplicate]

I need a rather long dictionary to bruteforce with, following a specific pattern: I need it to combine words using the dictionary, to up to three words. It wouldn't be case sensitive, and it would use ...
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0answers
139 views

How is a birthday attack actually performed?

I thought I understood the birthday attack until I tried to actually implement it. Either I'm implementing it wrong, or there's something wrong with my interpretation of the resulting probabilities. ...
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0answers
223 views

Brute forcing the Veracrypt header with THC Hydra

I was advised to brute force the Veracrypt header with THC Hydra/Cygwin, but I don't know how to do that. Any help would be appreciated.
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71 views

What can attackers do to increase the rate of attempts in a brute-force attack as the number of attempts increases?

I am aware of this post (about Moore's Law and brute-force attack). Suppose is the number of brute-force attempts, we have . What I want to ask is the following: suppose an attacker started a brute-...
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361 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
2k 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 ...
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1answer
171 views

Database logs have multiple “Logon Login failed for user” from different IPs

Background: I have an SQL Server database running on Amazon RDS The AWS dashboard has a section for logs and whenever I check the logs I see the following: 2018-04-27 06:10:26.00 Logon Error: 18456,...
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2answers
4k views

Hydra fails with “[ERROR] target ssh://192.168.16.128:22/ does not support password authentication.”?

I've updated Kali 2.0 to newest version - it is installed using VMWare. Now, every time I use hydra to brute-force SSH, I get the following error: [ERROR] target ssh://192.168.16.128:22/ does not ...