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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How rf remotes for “cloning” rolling code find matching codes?

I've been tinkering with a rf (garage door) remote control that has a scanner mode (google JMA SR-48 for details). This mode works for Mutancode and Erreka which I assume would be similar to KeeLoq. ...
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Hydra does not display the right answer in DVWA

I have been trying for days now to use Hydra in an attempt to crack DVWA brute force but to no avail, I am using the correct session cookie and to my knowledge have the correct syntax? Query is: ...
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734 views

Are enterprises Office 365 accounts overly exposed to brute force attacks?

Earlier this year the Scottish parliament was attacked by what described as a “Brute Force” cyber-attack. It was said that the attack targeted “MSPs and staff with parliamentary email addresses”. ...
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Hydra HTTP Form Post with parameters containing a colon “:”

I'm trying to brute force login on my domain using THC Hydra v9.1-dev. It is using an ASP.net form and some of the required post body parameters contain a colon : in them which is the separator used ...
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Bruteforce https post using single tcp connection

So I've tried bruteforcing my server using thc-hydra's https-post-form, but it floods the server very quickly and the requests start timing out. However, If I go through the browser where the HTTP ...
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109 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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536 views

Brute force hex password with exactly two special characters using JohnTheRipper

I want to optimize the way I'm using John the Ripper. I have a password with a know length (9) that consists only of (lower-case) hex characters and exactly two special characters. First I tried ...
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2k views

Intercepting hydra with burp suite

I'm using burp suite as a proxy and when I run hydra, burp suite should be able to catch that and log it in HTTP history, but instead of that I get the error Can not connect [unreachable] I tried ...
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Blocking URL brute-forcing on my server

Every day my server receives many GET requests in search of security holes. In other words, they are trying a list of words in search of a hole. for example: http://myapp.com/phpmyadmin http://...
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122 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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33 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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96 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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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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446 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 ...
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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 ...
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How to recover forgotten AES-256 password with bruce force?

The password was set on a flash drive using LaCie Private-Public for Windows 10. The password is 12 character long. For each character, I know if it is a number, special character, lower case letter ...
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174 views

Using hydra on a website that has the same response for both a wrong and correct password

I got my hands on an old-ish residential gateway with SIP support and two analog phone connections. I want to use it for it's SIP support to use analog phones with my SIP provider. I didn't know the ...
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381 views

THC Hydra false positives on Foscam login

I bought a Foscam C1 Lite this week and I want to try to brute force the login page with THC hydra. But currently I am getting false positives with the following command: hydra -s 88 -l user -P ...
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749 views

Kerberos and brute-force attacks

Suppose that I am the administrator of a system that uses Kerberos and password authentication. How can I make brute-force attacks on user’s passwords by an attacker who can capture network traffic ...
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104 views

No fields captured in BurpSuite

I am using burpsuite to bruteforce my routers login form, but I have encountered an issue... When I enter something into the password field, BurpSuite shows the request, but not what was entered. For ...
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Brute Force with Hydra Ignore timeout and 4 billion limit

We are doing an assignment where we are hacking eachothers websites or servers in school. I know the default username and know the default password is 32 characters long to ssh in. While I know I ...
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882 views

Hydra http-post-form dosen't work even if i got right parameter

I use BurpSuite to capture post request like this. After that I use hydra with syntax like this hydra -l admin -P pass.txt 192.168.0.1 http-post-form "/login.asp:Username=^USER^&checkEn=0&...
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785 views

Hydra hangs after 16 attempts

When I try to brute-force my router's admin page, Hydra is never making more than 16 attempts. After 16 attacks I receive only status updates with less and less tries per minute. Beside that, all ...
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Storing Social Security Numbers in a Database

I'm developing an online application that needs the user's social security number. The application won't be processed on the web server so I'll be using an asymmetric key. So a compromised web server ...
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2k views

Brute-Force/Dictionary attack against encypted file using PBKDF2 key derivation

I have been following this very useful post by Thomas. My use case is slightly different. I am developing a mobile application which requires some sensitive data to be stored on the device in a SQLite ...
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Linux Hydra issue - random correct password success

I have an issue with Hydra when I use it. I have tried the same command lines given in guides directly supported by the Damn Vulnerable Web Application (DVWA) v1.8. Ok so.. here is my attempt output....
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2k views

Distributed IMAP-Dictionary-Attack-Tool?

I have a client with a hacked IMAP-Account, and the attacker(s) made thousands of password-attempts, probably with a fixed set of passwords, from different IPs before they got in. After successful ...
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Can bruteforce attacks be prevented with tables of valid inputs?

Can this method of encryption prevent bruteforce attacks? If I had a hypothetical table (or function) where every grammatically valid sentence (in existence, limited to some number of words) was ...
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Is using “Signature Versioning” in Amazon S3 a secure way of selling ebooks?

I own an ecommerce platform that sells large (500 megabyte+) ebooks. To reduce server costs I am looking at hosting the ebooks on S3 and using Sendowl/ FetchApp to create the links to the downloads. ...
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What would be the algorithm that would be used to Brute Force Blowfish Encryption?

For my science fair project, I will be researching the algorithm for encrypting data using the Blowfish Encryption technique. Suppose I have a word I would like to encrypt using this method called "...
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Is the WPS implementation for Wifi Direct on Amazon Fire Stick secure?

Specifically: Does the fire-stick use PIN method or push-button method for its Wifi Direct implementation? From my experience using the Fire Stick for mirroring an Android phone, I would guess it is ...
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108 views

Hydra - Brute force command is stalling

Very new to application testing here. I am working through the hacker101 CTF (petshop) examples and I am having problems with brute forcing a username form with Hydra. The error message looks like it ...
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59 views

Bruteforce directory with Burp : 2 parameters used in 3 step macro for intruder

I try to bruteforce paths with Burp intruder but to do so I have to be authenticated and have a valid CSRF token (transmitted as a GET parameter). So what I want to do is : Call the login page to ...
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161 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 ...
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56 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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73 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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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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414 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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166 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. ...
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400 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 ...
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5k 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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107 views

Protect unauthenticated interface from guessing attacks

I am currently encountering a publically available interface; accessible at least via web form/webviews and some stateless protocol (presumably REST). In the past this form allowed you to view your ...
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119 views

Hydra returning error: “module option must start with http”

I am trying to brute force a web login password using hydra with the below command: hydra -s 8123 -x 2:8:aA1 -t 16 -m http://192.168.1.193 http-proxy I get [ERROR] module option must start with ...
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258 views

Would it take long to brute force a md5 hash like this?

1be8917510-36.51929856278002 10bce1af27-99.18403192423284 103fa11cc6-87.21158325206488 Few examples above and as you can see the pattern is: 1xxxxxxxxx-{a percentage (0-100) to 14 decimal places} x ...
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157 views

Spider (web scrawling) vs Force Browsing

I'm scanning websites with OWASP ZAP and noticed that the Spider attack and Force Browse attack return somewhat different results. What are the differences between Web Spiders (Web Crawlers) and ...
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3k views

How do I brute-force a WPA-2 wifi with Aircrack-ng in Kali Linux?

What I basically want to do is, perform a test on my Wi-Fi and brute force it instead of a dictionary attack. I googled, and all of them showed me examples of dictionary attack and no bruteforcing. ...
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155 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?