A brief note - this article is about the theory of how to crack passwords. Understanding how cybercriminals execute attacks is extremely important for understanding how to secure systems against those types of attacks.
This can be done either online (so in real-time, by continually trying different username/password combinations on accounts like social media or banking sites) or offline (for example if you've obtained a set of hashed passwords and are trying to crack them offline).
Offline isn't always possible (it can be difficult to obtain a set of hashed passwords), but it is much less noisy. This is because a security team will probably notice many, many failed login accounts from the same account, but if you can crack the password offline, you won't have a record of failed login attempts.
For example, if you know that someone is using a 5 character long password, composed only of lowercase letters, the total number of possible passwords is 26^5 (26 possible letters to choose from for the first letter, 26 possible choices for the second letter, etc.), or 11,881,376 possible combinations.
When you add in uppercase letters, special characters, and numbers, this gets even more difficult and time consuming to crack. The more possible passwords there are, the harder it is for someone to successfully login with a brute force attack.
This type of attack can be defended against in a couple of different ways. First, you can use sufficiently long, complex passwords (at least 15 characters). You can also use unique passwords for each account (use a password manager!) to reduce the danger from data breaches.
Whereas the attacks above require trying repeatedly to login, if you have a list of hashed passwords, you can try cracking them on your machine, without setting off alerts generated by repeated failed login attempts. Then you only try logging in once, after you've successfully cracked the password (and therefore there's no failed login attempt).
Password cracking is when a hacker uncovers plaintext passwords or unscrambles hashed passwords stored in a computer system. Password cracking tools leverage computing power to help a hacker discover passwords through trial and error and specific password cracking algorithms.
If a hacker discovers your password, they can steal your identity, steal all your other passwords, and lock you out of all your accounts. They can also set up phishing attacks to trick you into giving up more sensitive data, install spyware on your devices, or sell your data to data brokers.
As technology has advanced, guessing passwords has become easier for hackers. While some of the best password managers can defend against password cracking tools, learning about common password cracking techniques is a great way to swing the odds in your favor.
Sometimes all a hacker has to do is wait for a data breach to leak millions of passwords and private details. Hackers often share and trade sensitive data they find, so it pays to have privacy software like Avast BreachGuard that helps prevent companies from selling your personal info, protects you from social media snoops, and scans the web in case your sensitive details are out there.
A brute force attack is when hackers use computer programs to crack a password through countless cycles of trial and error. A reverse brute force attack attempts to crack a username through the same method. Brute force attacks are simple yet effective.
The worst passwords are sequential letters and numbers, common words and phrases, and publicly available or easily guessable information about you. These simple passwords are incredibly easy to crack via brute force, and they could end up in a data breach sooner or later.
A dictionary attack is a type of brute force attack that narrows the attack scope with the help of an electronic dictionary or word list. Dictionary attacks target passwords that use word combinations, variations on spellings, words in other languages, or obscure words that are too slippery for a regular brute force attack.
A mask attack reduces the workload of a brute force attack by including part of the password a hacker already knows in the attack. If a hacker knows your password has 10 characters, for example, they can filter the attack for passwords of only that length.
Offline cracking is when hackers transfer hashed passwords offline to crack them more safely and efficiently. Online attacks are vulnerable to discovery, can trigger a lockout after too many attempts, and are hampered by a network's speed. With offline cracking, a hacker is invisible, can attempt infinite logins, and is limited only by their own computer power.
Hashed passwords can be taken directly from a database by tried-and-true hacker techniques such as SQL injection. If a hacker gains administrator privileges, it's game over for all the passwords on the admin's system. Learning how to password-protect files and folders can save admins from a disastrous password breach.
A wily cybercriminal can put the pieces together like a jigsaw puzzle and then get cracking. Hacker communities share hashed passwords, user profiles, credit card numbers, and other lucrative material on the dark web. A dark web scan can show you if your information is up for grabs.
Network analysers are a dangerous modern password hacking tool, since they don't rely on exploits or security flaws in a network. After a network analyzer sniffs out the packets, a packet capturing tool can steal the payload of passwords inside.
A packet capturing tool can act as a sniffer for the packets of data moving across a network. One part of a packet is the origin and destination, while the other part is the actual data it is carrying, such as passwords.
With tech companies and other third parties collecting so much data, password crackers can pluck your private details out of the air. Your best bet is rival technology that can fight back and can keep your data away from hacker hands, such as a secure browser with anti-tracking tech.
Instagram is one of the most widely used social media applications. I am pretty confident that at least one of your friends or you are using it pretty much everyday. Today I am going to show you how a hacker could crack someone's Instagram password using a script called Instainsane.
It is finally time to crack the target's password. The only thing we need now is the user's Instagram username and you could also prepare a wordlist, though the script provides us with a default one which is actually preferable to use.
The way that Instainsane works is it creates a connection through the TOR network as Instagram only allows for 10 login attempts per IP to the same account. That way every 10 guesses Instainsane switches IPs through TOR to allow the cracking process. To speed up the process the script creates multiple threads.
Note: there is a bug in the script and sometimes when it finds the password it won't stop the process, so you will see more and more passwords being tested. The script pauses for a few seconds automatically every 100 guesses, so keep an eye out for the password.
Hi, I try to find out the password of instagram rauszu since. but if I forget to password an e-mail address that nobody knows. The account of my girlfriend. and she and I are desperate because we can not find the password anymore. I think they can not help me unfortunately anyway I would be very grateful if there was a possibility.
Hello! When i finish the brute force it says that \"passwords not tested due IP blocking\" and the number of not tested passwords is the same as the number of all passwords that are on my wordlist. That means no passwords are tested at all. Do you know how to fix this problem Thanks in advance!
Yes. Actually, two days ago, when I installed Instainsane, the tool worked, and gradually started to increase the number of not tested passwords per session. I checked if Tor is updated to the last version, and also when the tool starts, all ports on Tor are set without errors. I'm using it on Ubuntu on Windows WSL if that have something to do with the problem.
Passwords that are weak or easy to guess are more common than you might expect: recent findings from the NCSC found that around one in six people uses the names of their pets as their passwords, making them highly predictable. To make matters worse, these passwords tend to be reused across multiple sites, with one in three people (32%) having the same password to access different accounts.
Keyloggers, screen scrapers, and a host of other malicious tools all fall under the umbrella of malware, malicious software designed to steal personal data. Alongside highly disruptive malicious software like ransomware, which attempts to block access to an entire system, there are also highly specialised malware families that target passwords specifically.
Dictionary attacks are similar to brute force methods but involve hackers running automated scripts that take lists of known usernames and passwords and run them against a login system sequentially to gain access to a service. It means every username would have to be checked against every possible password before the next username could be attempted against every possible password.
For example, if a hacker is aware that a password begins with a number, they will be able to tailor the mask to only try those types of passwords. Password length, the arrangement of characters, whether special characters are included, or how many times a single character is repeated are just some of the criteria that can be used to configure the mask.
Offline hacking usually involves the process of decrypting passwords by using a list of hashes likely taken from a recent data breach. Without the threat of detection or password form restrictions, hackers are able to take their time.
Somewhat self-explanatory, shoulder surfing simply sees hackers peering over the shoulder of a potential target, looking to visually track keystrokes wh