We have a set initial password for brute force with the name string to provide keys for dictionary matching, and we can provide them with a set of strings to apply certain keywords to their dictionary with this parameter.
If you have made a RAR archvie a few years ago, and recently you want to unrar it but noticed that you've forgotten the password of it, what could you do? I bet you are searching possible methods to break the password here and there. Have you found a way that how to crack WinRAR password successfully? In this article, we will tell you whether it is possible to crack RAR password and how to do it.
It is a tough question asked by so many people. While googling, you may find that some people say that you can crack RAR/WinRAR password, others say that it is an impossible mission. Actually, there are several ways of cracking RAR password in this world with advanced technology. They vary in terms of efficiency and ease of use. You can check out the below options and choose one according to your current circumstances and needs.
The most effective and recommended method to unlock RAR password is using a professional RAR password breaker. Passper for RAR is absolutely what you need. This tool is rewarded as the fastest RAR password recovery tool in the market according to our test, which can check 10000 passwords every second. Moreover, with the intuitive interface, it is pretty easy to use. Only 2 steps needed, you can crack the password and open the locked RAR file effortlessly. Below are more outstanding features of Passper for RAR:
Step 2After that, Passper for RAR will start password recovery. When Passper for RAR has found the password for your file, it will notify you and display on the screen. Next, copy the password and use it crack the WinRAR file on your computer.
In some cases, you may not want to install any software on the computer may be due to limited space on your computer or other personal reasons. Therefore, in such a situation you can use an online RAR password unlocker. One of the popular online service is Password Online Recovery. The most attractive feature of this online tool is that you only need to pay for successful decryption. Howevever, this online service does not guarantee the recovery rate of a powerful encryption. Here is a guide on how to use it:
Step 3: The decryption process will begin immediately. Now, you only need to wait patiently for the tool to break the password for you. Once your password is cracked successfully, you need to pay for it and then you can see the password.
Another method to crack WinRAR password is using the command line. But this method only works with numeric passwords and it takes a very long time. Below is how it works:
You may not know that Notepad can also be used to break RAR password on your computer. Please remember that this method might not work for every RAR archive, but you can still try it and it only involves short steps.
It is the simplest method, but the chance of success is relatively low. Guessing RAR password completely relies on password creator since only he/she knows which password is frequently used. If you are the password creator of the encrypted RAR archive, we have prepared some reminders for you:
As you have seen in this article, there are different ways to crack RAR password on your computer. So which one should you use? As always, the best method is whatever best fits your need (including password recovery rate, recovery speed, compability, data security) in any given situation. You can simply check out our comparison table and learn which method is the best.
root@kali:~/Desktop# john crack.txt --format=Raw-MD5 --wordlist: /usr/share/wordlists/rockyou.txt Warning: invalid UTF-8 seen reading /usr/share/wordlists/rockyou.txtUsing default input encoding: UTF-8Loaded 52 password hashes with no different salts (Raw-MD5 [MD5 256/256 AVX2 8x3])Remaining 50 password hashes with no different saltsWarning: no OpenMP support for this hash type, consider --fork=4Press 'q' or Ctrl-C to abort, almost any other key for status0g 0:00:00:00 DONE (2020-05-07 14:50) 0g/s 354600p/s 354600c/s 17730KC/s !@#$%..sssSession completed
There are 6.63 quadrillion possible 8 character passwords that could be generated using the 94 numbers, letters, and symbols that can be typed on my keyboard. I'm skeptical that that many password combinations could actually be tested. Is it really possible to test that many possibilities in a less than a year in this day and age?
As per this link, with speed of 1,000,000,000 Passwords/sec, cracking a 8 character password composed using 96 characters takes 83.5 days. Research presented at Password^12 in Norway shows that 8 character NTLM passwords are no longer safe. They can be cracked in 6 hours on machine which cost ~$8000 in 2012.
One important thing to consider is which algorithm is used to create these hashes (assuming you are talking about hashed passwords). If some computationally intensive algorithm is used, then the rate of password cracking can be reduced significantly. In the link above, author highlights that "the new cluster, even with its four-fold increase in speed, can make only 71,000 guesses against Bcrypt and 364,000 guesses against SHA512crypt."
Suppose your set of 'obtained' hashes contained 5 million password hashes, then even for the 98 year WiFi case, 145 keys will be found on day 1 (on average). If your password is amongst them, then you experience that also for the WiFi case it is indeed possible!.... if my calculations are right
I know of one modest demonstration (Feb 2012, link) that claimed the power to make 400 billion guesses a second on a 25 GPU system. In that case, an 8 digit password would be blown in less than 6 hours; sooner depending on the brute-force method. But that assumes the attacker has access to the file that stores the encrypted password. And frankly, that is easy to do, if you have access to the computer itself. Even if you can't get to the HDD, the attacker would simply replace the keyboard with a computer that would send 'keystrokes' much faster than you could type. It might take longer, due to the speed of the USB connection, but human typing rate is not a good reference on this matter.
On the issue of characters used in a password, this is not quite as simple as most people state. What matters most is what the attacker expects to have to tried, not what characters you chose. In other words, what matters most is what characters EVERYONE in the system uses, not just you. For example, a random sequence of 'X', 'Y' and 'Z' is just as hard to guess as a random sequence of all letters of the alphabet...as long as the attackers doesn't know you prefer X, Y, and Z. But if, despite the availability of 100 digits, it is known to the attacker that everyone is using only X, Y and Z, then the attacker can narrow down the brute-force attack and negate the benefit of 100 digit security system. The principal of this is identical to that of the dictionary attack. This is why sysadmins might force everyone to use different character types; to make sure that a would-be intruder has to try all permutations.
This is not to say the specific characters used in a password don't affect the speed at which it is broken. That is, when someone says "an 8 digit passwords take 10 years break," that 10 years is the MAXIMUM time required. A more accurate statement would be, "it takes 10 years to test all combination of 8 digit passwords." But the fact is that some passwords would be guessed much faster depending on the character selection and attack method. For example, if your password 100-character alphanumeric system (e.g. 0-9......A-Z), and the brute-force attack uses sequential guesses, then a password starting with a '0' will be broken at least 100x faster than a password that starts with LAST character in that sequence (let's call it 'Z'). But this is tricky to deal with since you can never know what order the attacker may use. For example, does the attacker consider A or 0 the first digit? And is Z or 9 the last digit? Or if the attacker knows that everyone uses passwords that starts with characters towards the end of the alphabet, then he/she may try brute-force in reverse-sequence, and the password that starts with '0' will be safer.
So why are people still talking about brute force? Reason is that for applying a brute force technique you do not need any special thinking, and the amount of people capable of running a brute force technique is probably 10 times bigger than the amount of those who can download a cracking tool from the internet and really use it for cracking password.
Another reason is that if I had chosen a hard 8 character password like j$d1Ya+3 the "smart" techniques are not going to help much, so some folks do want to understand how long will it take the brute force to work.
Unfortunately, some companies still store actual text passwords in their databases instead of the hashes so if a hacker gets into the system, he now has more base words to add to his roster. So if you use the same password, or even base word, for two accounts and one of those is compromised, no matter how long or random it is, that hash and password are now known. The hacker can then log in to any account that you are using the same password for. This also means that if someone else uses your password, or some version of it as outlined above, you are compromised.
Ok, long story short, I'm currious how long it would take an agency to crack a 10-15 character winrar password. The file names in the archive are also scrambled including a word at the start and numbers and characters. Roughly, should I have reason to believe this could be cracked within a reasonable time frame?
Then it depends, not on the length of your password, but on the way you produced it. It's not the length which makes the password strong, but the randomness. If your password is a sequence of 15 random characters, chosen uniformly and independently of each other, then it will resist forever. If it is a common English word which happens to be 15 characters long, then it is toast and will be recovered in a matter of seconds. 2b1af7f3a8