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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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 ...
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0answers
51 views

Brute Forcing Veracrypt with python [on hold]

I forgot first five letters of the 11 letters long password of my veracrypt encrpted file (hidden). I was searching for a way to brute force veracrypt file and came across this python project. Using ...
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2answers
39 views

Is it safe to implement 15 bytes password reset tokens?

I want to figure out how safe is to implement a 15 bytes long password reset token. If we have 26 letters and 10 numbers, 36 possibilities per byte. And we have a 15 byte long token, that means that ...
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0answers
52 views

How to do a Windows 10 Account Password Attack on a Surface Pro? [on hold]

From my Windows Surface Pro, I'd like to do a brute-force attack on my Windows password. The password is not that strong, so it should be cracked in proper time. I tried to get the hashes with ...
14
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3answers
72k views

What are the differences between dictionary attack and brute force attack?

Can someone explain the major differences between a Brute force attack and a Dictionary attack. Does the term rainbow table has any relation with these?
1
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1answer
63 views

Replace PATH space with random string

I came across http://test.co.uk/img/rOTJwSOqWzHaDsEUcHhI. If we take a look at it the directory space is protected against bruteforcing of the whole directory to explore private images. I don't know ...
2
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3answers
4k 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 ...
-1
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1answer
107 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 ...
2
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4answers
860 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 ...
0
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2answers
80 views

Is 8 characters long password reset token strong enough

I am testing this website, in its password reset functionality it provides a link with a token like most websites, now i asked for multiple password reset links to see any pattern in tokens and this ...
0
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1answer
69 views

MySQL brute force attempts from localhost

We have a Linux box (Ubuntu VERSION="18.04.2 LTS (Bionic Beaver)" that hosts MySQL. When I check the MySQL logs I see constant failed attempts to log in from root@localhost. does this imply that I ...
0
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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 ...
3
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1answer
321 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. ...
0
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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
166 views

How do attacks on password locked accounts work?

A lot of questions here are about the safety of passwords e.g a Login Password to an account on site X. But how can attackers get in the account when they have to guess the passwords? I know there is ...
0
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0answers
39 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 ...
13
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5answers
8k views

Defense against attacks using dictionaries

Some forms of attacks on passwords use dictionaries. It is safer to use nonsense passwords like YunSUanLin, Artibichoke, etc., which do not seem to pertain to any dictionary?
3
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1answer
282 views

How secure is KeePass KDBX4 by default?

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/...
7
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2answers
2k views

How secure is a Windows 10 PIN not needing enter?

I've searched around about Windows 10 PINs and although have seen a few answers regarding the security of them as a whole, I haven't found any discussing the fact that when I type in my PIN, the ...
1
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1answer
129 views

How to speed up brute forcing of finding a WEP key from a captured file?

I have been working on decrypting a WEP .cap file using crunch. It has 1268 IVs. I am wondering: Can I get a clue from the captured file to speed the process of brute-forcing? If not, what other ways ...
-4
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1answer
93 views

Binary Numbers converted to Hexadecimal private key [closed]

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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0answers
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 ...
0
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1answer
29 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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0answers
48 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 ...
0
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2answers
258 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 ...
0
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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
137 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
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 ...
0
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3answers
299 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 ...
1
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1answer
92 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 ...
12
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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
275 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
64 views

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
58 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 ...
22
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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
124 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: ...
0
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0answers
23 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 ...
1
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1answer
226 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 ...
0
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0answers
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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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
52 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 ...
1
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0answers
27 views

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 ...
0
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1answer
130 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 ...
0
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2answers
292 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 ?
2
votes
2answers
173 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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vote
3answers
200 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 ...