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
299 views

Law enforcement cracked my phone?

Police took my android phone a few months ago. It was encrypted and had the 10 max tries destruction thing set on. I noticed that yesterday the device disappeared from my android device manager. ...
4
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1answer
22k views

Forgot password to 7-Zip archive

I think I already know the answer to this question, but I thought I'd ask the experts anyway. A few months back, I created a password-protected 7-Zip archive which housed the source code of a simple ...
1
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1answer
231 views

How to brute force HTTP Basic Authentication requested with XHR?

How can one brute force a website using HTTP Basic authentication using metasploit which uses XHR in background? I am getting error "No URI found that asks for HTTP authentication". Relevant headers ...
5
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1answer
256 views

Blocking Chinese IP addresses

I recently checked one of my servers' auth.log file and noticed some very suspicious activity. I recently shut down my server's ssh daemon, so the logs end on Jan 22, but what I noticed after ...
0
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1answer
86 views

Can a brute force attack be certainly prevented on a unix/linux shell?

I've been getting kind of curious about computer security. I know brute force has been discussed a fair bit on Stack, but I want to elaborate a bit by asking, "Is it possible to /certainly/ stop ...
2
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3answers
456 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 ...
1
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1answer
130 views

How does encryption strength make a difference to an attacker

Take for example I have my social security and other personal information stored as a string that I am trying to encrypt on my local drive. My first method of encrypting the string is to use a ...
0
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1answer
235 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 ...
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1answer
101 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
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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 ...
16
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5answers
70k 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
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1answer
143 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
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2answers
180 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
666 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
189 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
760 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
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0answers
36 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
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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
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1answer
82 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
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0answers
46 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
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1answer
126 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
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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
129 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 : ...
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votes
1answer
179 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
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4answers
127k 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?
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3answers
434 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
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0answers
96 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
220 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
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1answer
96 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
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0answers
76 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
192 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
363 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
304 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
68k 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
104 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
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1answer
216 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
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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
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2answers
641 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
244 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 ...
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votes
1answer
158 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
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2answers
73 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
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1answer
66 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
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3answers
165 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
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3answers
152 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
126 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 ...