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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-4
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1answer
89 views

Binary Numbers converted to Hexadecimal private key [on hold]

Couldn't you use brute force to guess someone’s binary number because it's 1 or 0 - 256 times then just keep switching 1's and 0's around- which then can be converted hexadecimal to guess their ...
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1answer
194 views

How secure is KeePass KDBX4 by default? [on hold]

How secure is KeePass KDBX4 by default if someone obtain the .kdbx file and attempt to brute-force it without knowing any hint of the master password? With assumption : The password length is equal/...
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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
27 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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44 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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2answers
248 views

How to bruteforce smime.p7m key

My information security teacher gave me homework - hack smime.p7m. He said that the key is simple and bruteforce will not take much time, but I can not find a utility to do this. Maybe you know these?
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4answers
3k views

Can ssh keyfile security be broken in a few hours if the file is exposed?

At this link there is a claim that if an RSA key has a strong passphrase security might be broken in a few hours if an attacker has the private key. Is there something weak about the security of RSA ...
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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> ...
7
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1answer
129 views

TOTP brute force prevention

Lets use Google Authenticator as example. A 6 digit code is generated every 30 second. Each random attempt has 1/1,000,000 chance of success. Server will usually accept code of ±30s which increased ...
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4answers
802 views

How to protect WordPress from brute-force attacks?

One of my WordPress sites is being constantly attacked with brute force. I have the WordFence and Clef plugins installed. The number of login attempts is limited to just one. The password is very ...
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4answers
8k views

Nmap http-brute - Supplying arguments for bruting via GET

I'm attempting to brute a site in my test lab with Nmap's http-brute nse, which has the URL structure https://192.168.101.6/api/auth?email=a@b.com&password=pass Unfortunately Nmap's official ...
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3answers
293 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
88 views

Centralized brute force login detection using netflow data

Is brute force login detection feasible with netflow data? With the netflow data one could check the number of incoming packets to a specific destination port (for each flow). If the number is below a ...
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1answer
2k views

Can/do botnets brute force “high value” users of services like Gmail?

On an intranet a login is generally disabled after a very small number of failed logins. But a public email service like Gmail can't do the same, otherwise pranksters would just be continuously ...
0
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1answer
230 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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0answers
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Preventing Linux brute force concurrent su/sudo attempts

Its well known that popular Linux distros use the PAM default to slightly delay incorrect login attempts, thus mitigating brute-force attacks against a user account (for example, running su repeatedly ...
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0answers
55 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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2answers
7k views

Do Veracrypt encrypted volumes have any kind of brute force protection?

I have a 10mb encrypted volume which I made with Veracrypt and was planning to upload it to the internet. I have a pretty strong password but was worried about its protection against brute force ...
2
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3answers
118 views

Terminology for reduced brute-force attack?

Many security algorithms today have such a large key length, that there's just no use in trying to brute-force a key. For example to find one AES-256 key you would have to try 2^255 keys on average. ...
33
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5answers
8k views

SSH - If Eve has the passphrase and public key, can she derive the private key?

I have used ssh-keygen for creating an RSA 4096-bit SSH private and public key pair. I used a passphrase for the private key. If an attacker, Eve, knows the passphrase in addition to the public key: ...
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0answers
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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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1answer
202 views

Windows server 2016 Remote Desktop username leaked

One of our servers got infected with ransomware last week (Matrix, .Grhan). The server allowed remote desktop connection from outside on the default port, which was a big security hole (and also, the ...
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0answers
27 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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1answer
3k views

OWASP ZAP bruteforce by password not username

I want to bruteforce a login page using OWASP ZAP, using two separate passwords (90 lines) and username (200 lines) files, with the bruteforce POST requests to be ordered by password like: user001:...
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0answers
50 views

Bruteforcing via port 88 on MacOS

Macos has open port 88 by default. Is it possible to check validity of the password via this port from Linux and how? If the vncserver is active, it is possible to know also the username (by ...
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0answers
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How much time is needed for bruteforce kerberos/ntlm?

My question is simply how much time an attacker needs for full bruteforce on typical complexity password policy given either kerberos ticket/ as req or Ntlm transaction. This depends on the ...
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1answer
106 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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3answers
6k views

Hydra producing fake login passwords

I'm trying to "hack" (login) into my own HTTPS website account through Hydra. Therefore, it is 100% legal. Hydra keeps producing tons of incorrect passwords. This is the code I use: hydra -v -V -l ...
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2answers
238 views

How to brute force only username not password?

I want to find the username first, then pass the username and a password list. I could not find flags to ignore password in Ncrack and other related tools. The device I want to find a username is ...
9
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1answer
3k views

What local resources are used when bruteforcing a remote service?

What pc resources are used when bruteforcing ? I mean bruteforcing something online, not hashes. Do you need a good amount a RAM and a good CPU or it's just about the internet speed ?
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2answers
169 views

How does Window Hello protect against brute forcing?

With my Windows 10 computer, I have the option to set up a PIN with Windows Hello (I believe it's with that program). My normal Outlook password is 15+ characters mixed with upper case and lower case ...
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3answers
197 views

Disguising the type of hash used

I've read about why MD5, SHA1, and many other hashing functions are insecure, by a lot, but I'm thinking of doing a different approach. It won't increase security, I'm aware of that, but I believe it ...
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1answer
1k views

RSA-1024 vs. DSA-1024: Claim DSA SSH key is much faster to brute force

Does the brute force speed vary significantly between 1024-bit RSA and DSA SSH keys? DSA like gpu keypairs are probably DSA/Elgamal? (Can't find docs) EDIT: The reason I ask is an instructor that "...
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1answer
91 views

Question about brute force performance

I just make an SHA512 brute force programs that can do 5MH/s on my i5 3.5Ghz (4 cores) which manage to use all CPU resources. If I run the program on a 2PFLOPS hpc , How many hash can it generate per ...
0
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1answer
119 views

Generating passwords with rule: the contents within a 10 characters string must maintain a certain ratio of numbers and letters in no particular order

I'm playing around with Kali and am looking to crack my WPA2 default password. I started generating 10 character passwords with a charset of solely digits and upper alpha lastnight and after 10 mins, ...
1
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1answer
47 views

Postfix SMTP - Can I use SSH public keys instead of sasl password

I am relatively new to managing mail server, although i am familiar with webhosting servers not running dedicated email services. Postfix is configured to use sasl-password authentication I have ...
132
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10answers
259k views

Where can I find good dictionaries for dictionary attacks?

I’m wondering where I can find good collections of dictionaries which can be used for dictionary attacks? I've found some through Google, but I’m interested in hearing about where you get your ...
0
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2answers
261 views

Protect MySQL against brute-force attacks on dedicated CentOS 7 server

I have a database in a dedicated server (CentOS 7) setup by an external provider. I see a disgusting amount of brute-force attempts in MySQL log file every day. I know the best option would be to not ...
0
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1answer
1k 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 ...
5
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1answer
319 views

Spoofing an NTP server to allow bruteforce on any smartphone

We all know that smartphones (i'll take iPhone as an example) rely on SNTP/NTP servers to update a device's time and date. So, by creating an SNTP server that mimics Apple's server, we can actually ...
2
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1answer
289 views

Hydra - all passwords work

I want to test some mechanisms of my website when the password of a single user is entered a lot of times in a short time incorrectly in the login form. Therefore I got Hydra (for windows) on GitHub. ...
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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 ...
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1answer
77 views

Is there any methods available other than brute force and dictionary attacks?

I am curious to know about the wifi attacks. And I have known a little bit about brute force attack and dictionary attack. Is there any other methods available other than these two...?
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1answer
134 views

Subdomain scanner without brute-force attack? [duplicate]

It is possible to scan subdomains of network without brute-force attack? If yes, how it works? I tried to scan the network with some penetrating tools and it returned to me subdomain which doesn't ...
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2answers
211 views

BurpSuite Brute Force Iteration

I am working on a security assessment for an online application. When testing the pin verification mechanism and possibilities of brute force, I came across a post request that looks like the below ...
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2answers
3k views

How to prevent DirBuster to stop listing apache server side files

I have deployed a php project on apache. When I use DirBuster tool to scan my site, it lists all server side files. I want to stop this listing. I have modified the permission. When I give the less ...
12
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4answers
4k views

Wordpress Brute Force Attacker knows real admin Username -

I've noticed a brute force attempt on several different Wordpress installs that know the right admin user name for those respective sites... It seems very strange that the hacker would be able to ...
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2answers
634 views

How secure is aes-256-cbc with a 40 char password [closed]

I'm using this command from this article to encrypt a file: openssl enc -aes-256-cbc -in /etc/services -out services.dat -k MYPASSWORD If MYPASSWORD is 40 characters in length, roughly how long ...
1
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1answer
110 views

Is it possible to prevent WiFi password brute-forcing?

Are there any measures I can set, except using a better password, to prevent someone brute-forcing a WiFi password?
6
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2answers
42k views

Is it possible to crack a PIN / PUK code on a phone SIM card?

When deploying a mobile phone best practices policy, one of the points which were raised was the requirement for the user to protect his SIM card with a PIN. The theory is that three failed attempts ...