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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.

2
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2answers
150 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 ...
1
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3answers
173 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 ...
9
votes
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 ?
-1
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0answers
62 views

Brute force WPA/WPA2 access point? [closed]

Assuming you have a password list, is there an open source tool that can take that list and brute authentication to a PSK WPA/WPA2 wireless network? I am not trying to crack a handshake or PMKID, but ...
1
vote
1answer
40 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 ...
0
votes
1answer
58 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 ...
0
votes
1answer
101 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
vote
1answer
63 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...?
0
votes
2answers
128 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 ...
-1
votes
1answer
65 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 ...
1
vote
2answers
115 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 ...
1
vote
1answer
107 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?
0
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0answers
22 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 ...
0
votes
1answer
101 views

Question about birthday attack on password

Based on birthday attack, you need to generate at least 2^n/2 of possible combination to have 50% chance of finding a password. I have a list of 3000 random password make from 16 characters of upper, ...
3
votes
1answer
97 views

Why does Authenticated Encryption not decrease confidentiality?

Recently, another question here made me start thinking about authenticated encryption. In my understanding AE allows to check whether a key is valid for decryption without even decrypting the ...
1
vote
2answers
379 views

Bruteforce Veracrypt

I forgot my Veracrypt password, I have around 1000-2000 possible password combination and I need a software to bruteforce the password on Windows. What software would that be?
0
votes
1answer
57 views

Please may I know why I am getting this Sshd log

why I am getting this sshd log Feb 1 13:07:57 sshd[6453]: Failed password for root from 193.34.22.63 port 28980 ssh2 Feb 1 13:08:26 sshd[6897]: Failed password for root from 91.205.189.15 port 48155 ...
0
votes
1answer
61 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/...
0
votes
3answers
242 views

How often do brute force attacks find the password or key in a much shorter amount of time than the theoretical max?

For a 128-bit key, it would theoretically take many years and a percentage of the entire worlds power output to check every possible key, or for 256-bit it would take 3 sexdecillion years. But the ...
0
votes
1answer
249 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 ...
0
votes
0answers
140 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 ...
0
votes
1answer
82 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 ...
1
vote
1answer
133 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
votes
0answers
90 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 ...
0
votes
1answer
84 views

How do these attackers find my IP? [duplicate]

Recently, I have been reading a lot of my ubuntu log files (in /var/log/auth.log), and I can see that some IP addresses are actually trying to 'brute-force' their ways into my VM using SSH by testing ...
2
votes
3answers
124 views

Encryption Key vs. One-Time Pad Brute Force

How does an attacker know when they've cracked a traditional encryption key? Wikipedia describes the one-time pad: A 140 character one-time-pad-encoded string subjected to a brute-force attack ...
-3
votes
1answer
128 views

How long would it take to brute force a URL path that's 5 characters long

example.com/[a-zA-Z0-9] the code can be any mix of numbers + uppercase/lowercase letters and it's 5 characters. How long would it take to brute force or is there an easier/faster way to do it?
0
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0answers
36 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 ...
0
votes
0answers
45 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 ...
0
votes
1answer
168 views

Using hashcat for collision attack [closed]

Whenever i tried generate √N randomly(possible combinations of password length), i always find few collisons of the hash password no matter the length, if the password was made of entirely random ...
2
votes
1answer
171 views

What is the fastest way to brute force a hardware code

Where I live, there is a keypad with numbers from 0 to 9 and two letters, A and B. Using it I noticed that the code was checked on the last 5 things entered. If I were to try every code on the keypad,...
0
votes
0answers
114 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. ...
0
votes
1answer
89 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
votes
0answers
172 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.
1
vote
1answer
86 views

Partially forgotten encryption password for Windows users [duplicate]

I encrypted important files with Veracrypt and I remember most of the password but some parts are forgotten. I need some advice as to what would be the most efficient way of getting the encryption ...
0
votes
1answer
331 views

Brute force MD5 with a prefix and suffix up to n characters/words

I have a couple of things I would like to explore with hashcat. I have a MD5 hashed password, which I know for a fact has a prefix and a suffix. The actual password is located in the middle of the ...
-1
votes
1answer
81 views

Should I blacklist countries to stop brute force attacks?

I'm getting attacks at wp-admin from numerous countries and IPs. When I get a notification from Wordfence that there has been an attack, I blacklist the originating country from the WP backend. Then I ...
0
votes
1answer
123 views

I think my raspberry was hacked, what should I do? [duplicate]

First of all, sorry if all of this seems a bit stupid, but my field of expertise is software development, not security. So, here is what happened. 1/ The breach I did something I really shouldn't ...
3
votes
1answer
111 views

Are there any known collisions of a “long” (64 bit) OpenPGP key ID?

We know that the "short" 32 bit OpenPGP key IDs can be easily brute-forced and the recommendation is to use the "long" 64 bit IDs or full 160 bit SHA1 fingerprint. However I am concerned that the "...
2
votes
1answer
190 views

Partially forgotten encryption password

I encrypted important files with Veracrypt and I remember most of the password but some parts are forgotten. I need some advice as to what would be the most efficient way of getting the encryption ...
0
votes
0answers
70 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-...
0
votes
2answers
310 views

Brute-force attack to exe file [closed]

I have an encrypted file and the program.exe through which it was encrypted. When I want decrypt file, I need to know the password with which the file was encrypted. Can you help me some tool for ...
3
votes
2answers
147 views

Is using a phrase from a book as a password such a bad idea

I've been told/seen online that choosing a sentence or a phrase from a book and using it as a password is a bad idea. How is this true? Unless the potential attacker knew which book you used I don't ...
2
votes
2answers
174 views

Account lockout to protect from brute force: doesn't it open up vulnerabilities to DOS attacks? [duplicate]

AFAIK the recommended practice to mitigate brute force attacks is to lock an account down for, say, 15 min (perhaps escalating lockout time if the attack continues afterwards?) after, say, 5 failed ...
2
votes
2answers
149 views

Why is it still necessary to block brute-force attacks when passwords hash verification requires significant work?

For authentication controls, Owasp gives advice to prevent brute-force attacks by locking out account, and I see this kind of advice in several places (blocking by source IP after failed logins, ...
1
vote
1answer
246 views

Hashcat bruteforce define digit range form and to

I know this password is between 90,000,000 and 500,000,000 how can I tell hashcat to bruteforce exactly in that range? I mean starting from 90,000,000 and ending at 500,000,000 I go the password ...
25
votes
6answers
9k views

What would be the key size for a picture used as a key?

I'm working on a cryptosystem that uses colour pictures as keys for encryption. I'm trying to guess what is the key size of my cryptosystem in order to find the feasibility of a brute force attack. My ...
1
vote
1answer
257 views

What are the disadvantages of using Shamir's Secret Sharing to implement a Partial Password scheme?

Suppose I want to implement a partial password scheme, where the user authenticates by using two passwords: one a normal password, the other is partial, where he only needs to type the selected three ...
0
votes
0answers
261 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 ...
0
votes
1answer
130 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-...