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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0
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1answer
201 views

How to brute-force WPA-2 password of specific set of characters using oclHashcat?

I want to test oclHashcat on a WPA-2 PSK password of length 8 containing only characters in the set {a-z, A-Z, 0-9}. To do this I have already captured the handshake in a .cap file and converted it ...
-2
votes
1answer
83 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, ...
7
votes
3answers
3k views

Why is it harder to brute force an iphone than a zip-file?

Having only 1,000,000 possible combinations, an encrypted zip-file with a 6-digit numeric password, could be brute force cracked within a second. But for an iphone (let's say iOS9 if it matters), it ...
55
votes
8answers
9k views

Am I experiencing a brute force attack?

When checking the auth log of a server with the command: grep sshd.\*Failed /var/log/auth.log | less I see thousands of lines like this: Jan 12 11:27:10 ubuntu-leno1 sshd[8423]: Failed ...
15
votes
5answers
69k views

How to generate dictionary for a dictionary attack?

I need to crack my own password. Advantage is that I know possible characters and maximum length. What I need is to create a dictionary. The dictionary should contain all the combos of characters ...
1
vote
1answer
130 views

Yii client side captcha validation

Apparently, Yii web application framework generates some kind of hash value from captcha codes it generates and sends it to the client side so it can be used for client side validation of the captcha ...
3
votes
2answers
168 views

Is there known statistics of passwords used during brute force password attacks?

I have been reading quite a bit about brute force attacks and I am wondering whether the passwords that are used in such attacks should be kept around so as to later prevent my users from having those ...
7
votes
2answers
637 views

Why do so many cracking attempts originate from China?

I recently put a Linux server online and it didn't take long until I had the first attempts to brute-force the SSH login. It's not that I am worried about that - I trust the security of my server. But ...
5
votes
1answer
185 views

Is there an equivalent of an Apple cryptochip in Android devices?

Apple has a cryptochip which, beside managing the encryption keys, tunnels authentication and provides throttling of failed attempts, as well as the ability to trigger a device wipe after several ...
31
votes
8answers
5k views

Do non-keyboard characters make my password less susceptible to brute forcing?

I can put characters in my password for which there are no keys on a keyboard. On Windows, Alt+#### (with the numpad) inserts the character for whatever code you type in. When I put this in a ...
6
votes
4answers
754 views

Can't brute force password cracking somehow be throttled?

Online articles mention the importance of a strong password and suggest that hacking tools allows bad guys to attempt millions of passwords per second. I am wondering why OSes and websites and such ...
3
votes
0answers
35 views

Reaver stuck at flow_handler

I tried to run Reaver against my router at home using an Ubuntu 15.10 laptop. The command used was: sudo reaver -i mon0 -b XX:XX:XX:XX:XX:XX -vv -c 7 -a (the channel I got from aerodump-ng). I'm ...
2
votes
0answers
43 views

Customize John The Ripper BF technique

Is it possible for me to customize the way John the Ripper brute forces a .cap file? I, knowing my WiFi password, want to crack it fast as possible (no hit with word list). Can I customize John to ...
1
vote
1answer
77 views

Is it secure to allow an account to use `test123!` as their password?

I'm working on tightening up security for the auth layer of my app and I'm currently making a call on the complexity I'll require for passwords. Is there a 'standard' recommendation for complexity? ...
1
vote
0answers
45 views

trapdoor information with hash functions

I have been playing with an idea for the past few days. I have been unable to find information on here or crypto.stackexchange about using trapdoor information in the input to a hash function. ...
1
vote
1answer
121 views

SSH Key vs Complex Password with Fail2Ban & Two Factor Authentication

Normally you hear that using an SSH Key is far more secure than using a regular password. However I've been wondering if this statement is really true. Let's say we have the following variables for ...
20
votes
7answers
3k views

Are reCAPTCHA enough to prevent brute-force password guesses?

I was wondering if reCAPTCHA were strong enough to prevent BruteForce from bots or if I needed to add more security, such as sending a unique mail to the user every 5 tries that someone try to log on ...
7
votes
2answers
111 views

Is lack of wildcard DNS entry a security vulnerability?

A friend of a friend received an email from a security researcher that looks legit. Researcher submitted several vulnerabilities, one of the them reads like this Vulnerability # ... Title : ...
-2
votes
1answer
173 views

Can someone bruteforce my OSX? (Macbook)

Is it possible for someone to bruteforce or perform a dictionary attack on a Macbook? It's very easy to bypass security of a Windows box (Password Protection) , what is the difficulty level of ...
9
votes
4answers
125k views

Wordlists on Kali Linux?

I notice that in /usr/share/wordlists in Kali Linux (former Backtrack) there are some lists. Are they used to bruteforce something? Is there specific list for specific kind of attacks?
1
vote
3answers
426 views

Adequate prevention of distributed brute force attacks?

What are good ways to prevent distributed brute force attacks on my website? I think (not sure. if someone can assure me, thanks!) my site is secure against normal brute force attacks as I am using ...
0
votes
0answers
90 views

Hydra command for cracking a webpage which uses <span> tag for failed login attempts

I'm trying to for crack a simple webform for testing hydra in Kali. When the webpage encounters a wrong username and password combination it pops up a message using the following html code:: ...
0
votes
1answer
216 views

ISP has informed us that our server is launching brute force attacks on WordPress sites, how do we end this? [duplicate]

Misc Situation: -Server login is obtained by hacker, hacker places malicious brute force file in /hacked/bruteforce/ -Server password is then changed, hacker can still run script by navigating to ...
1
vote
1answer
78 views

How effective are firewall rate limiting rules for slowing down brute force and DOS attacks?

I am investigating methods to slow down the rate at which attackers can make brute force attempts against my webserver's SSH and HTTP services. I have come across many articles as well as the ...
1
vote
0answers
71 views

How secure is Asus router latest framework function: “Added protection mechanism for GUI login brute-force attack for login username and password.”?

I have just updated my RT-N12 D1 router to the latest framework, and it has new function - "Added protection mechanism for GUI login brute-force attack for login username and password.". I Googled and ...
2
votes
2answers
185 views

Why do websites force the user to use a long and complicated password when brute force isn't possible?

if you have a phone with 4-digit pin and the phone does not get locked no matter how many times you put the wrong pin it makes sense to use 10 or 16 digits as it'll increase the time the attacker ...
3
votes
2answers
7k views

How long it will take to crack a RAR password?

I wonder how long it will take to crack 16 character alphanumeric WinRAR password for a mini supercomputer. As far as I know graphic cards are preferred over CPUs to crack passwords nowadays. If we ...
2
votes
2answers
323 views

How can I make wordlist smaller size?

I've been thinking if I create numeric 8chars wordlist and then compress it, can I directly input compressed wordlist into aircrack-ng or is there a way to make a smaller size wordlist, because if I ...
4
votes
3answers
298 views

Can using emojis make someone's password safer?

I was just thinking about this the other day, after reading about making safe passwords, you have a few options: The first would be, adding numbers, or something other than just a word ...
9
votes
5answers
67k views

Bruteforce on 10 characters length WPA2 password

I'm trying to hack my own WPA2 network for learning purposes. I have the *.cap file generated by aircrack-ng tools after a WPA handshake. I've tested by including my own password and a bunch of ...
2
votes
2answers
99 views

REST Services: Limiting the concurrency of a login endpoint

Scenario: A botnet is recruited to try to authenticate against a website or service with each bot trying infrequently using a common password and a list of 'real' email addresses, avoiding the ...
2
votes
1answer
200 views

Bruteforcing an iOS PIN

The iOS Security document describes several security mechanisms implemented in iOS 9. I am specifically interested in the actual security of a 4 digits PIN on iOS. I am looking for tangible ...
3
votes
2answers
32k views

Remove Password Protection from XLS Document

Similar to what is listed here, http://datapigtechnologies.com/blog/index.php/hack-into-a-protected-excel-2007-or-2010-workbook/, is there a way to remove the password from an XLS (Excel 2003) ...
1
vote
2answers
634 views

What would be the most efficient way of brute forcing a wifi key [duplicate]

I was wondering how can a brut force of my wifi be prevented so I want to know the best technique that can be used to brute force it first, so protection isn't my question. My question is: What brute ...
2
votes
2answers
100 views

my bruteforce prevention has major downsides - any ideas?

I'm currently searching for the best way to prevent my software's webportal from bruteforce attacks and came up with the following idea: 3 login attempts without any visual challenge after 3 failed ...
0
votes
2answers
217 views

Do you need more then 128bit entropy

UUID use 128 bit numbers. Currently it is not feasible to randomly produce two UUIDs that are the same. Does that means 128 bits of entropy is suitable for all cryptographic operations? I would ...
-4
votes
1answer
157 views

is there any playground for brute force? [closed]

Is there a site where i can make an account and run my brute forcer to check it for infinite attempts? Something which does a HTTP request and no javascript submit.
2
votes
2answers
70 views

Isn't ssh-copy-id exposing to a brute force attack?

It is a common knowledge, that using keys to authenticate ssh users is more secure than using passwords. However, even with password login disabled, when running ssh-copy-id I am still asked for ...
0
votes
1answer
64 views

Can an old fashioned crypt encrypted file be brute forced, if so how?

If I encrypt a file using the old Unix/Linux crypt() function, how can it be decrypted or attacked? I understand how a password file (for example) is attacked, you guess passwords, run them through ...
2
votes
3answers
164 views

What prevents a coder from brute forcing a wifi?

I know that a coder is able to connect to a wifi through code so my question is: Is there anything that will make it difficult to brute force a wifi password?
2
votes
3answers
147 views

Does brute forcing require a password and username list?

I have been learning metasploit. One thing I noticed was that, all the videos on YouTube, which said "Brute forcing", used a password and a username list. My question is that, won't this be called a ...
0
votes
1answer
125 views

Ignoring collision and (second) pre-image resistance, what makes a cryptographic hash function strong?

With regards to resistance against dictionary and brute-force attacks to "crack" hashes containing passwords, what determines the resistance of a cryptographic hash function? Since collision ...
16
votes
5answers
3k views

What is the difference between login throttling and temporary account lockout?

I am currently working on the redesign of a login page. I have initially suggested that login be throttled whereby pauses (incremental - in number of seconds) are introduced between each failed login ...
1
vote
0answers
76 views

Connect to a wifi through code [closed]

Is there any way a person could write a software using for example C++ to connect to a wifi completely by using code?
1
vote
1answer
323 views

How to use the standard (non-dictionary) brute force attack on FTP in THC-Hydra?

In the process of attempting to secure my local LAN, I have determined that I am at little risk of a dictionary brute-force attack. This being said, a standard brute-force attack which involves ...
2
votes
4answers
1k views

One-Time-Passwords resist against bruteforce attacks? Immune Alternative?

Does a One-Time-Password like Google Authenticator or YubiKey protect against brute force attacks with unlimited computer power? If not, what algorithems are immune to bruteforce attacks against ...
1
vote
3answers
118 views

How to protect from DoS on get method?

Suppose I have a website and I want to make sure that a hacker isn't making my server down by utilising a DDOS attack on my website. I thought of getting IP address and revoking the access, but it ...
2
votes
3answers
175 views

Feasibility of time-based database brute-force attacks on websites

I recently learned that there is an attack that utilizes the fact that when brute-forcing a compared string (e.g. hash from a password or token) in a database the query fails a few nanoseconds earlier ...
5
votes
1answer
153 views

Random padding in hash functions

In this answer, it was recommended that you add random padding when hashing messages for a trusted timestamp, such as for predictions, in order to avoid dictionary and brute force attacks (at least ...
3
votes
1answer
221 views

Writing your own John the Ripper module

I have a script in C, which is able to determine the password of certain data. It uses HMAC and RC4 algorithms to encrypt the given password and then compares that later to the given data. If they ...