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«Today I downloaded a cabinet file whose format is RAR from the web. Just as I was trying to extract the RAR file, it asked for password. I looked for the extracting password from the website where I downloaded the RAR file, but didn’t find it. Now who can tell me one way to unlock encrypted RAR file without password? Any RAR file password cracking software or tool is OK. But make sure it has no virus. Thanks in advance.«
In this case, firstly try to unlock the encrypted RAR file by the following 2 means.
1. Double click your password encrypted RAR file. Then double click to expand the folders saved in it. Maybe you can find the password there.
2. Try to use the website where you downloaded the encrypted RAR file as the extracting password.
If failed to unlock the encrypted RAR file with the above means, now provided you the powerful and certainly effective software called iSumsoft RAR Password Refixer. Use this program to crack rar file password fast. Now, letвЂ™s begin.
Unlock encrypted RAR files with RAR Password Refixer
Step 1: Get RAR Password Refixer.
Download RAR Password Refixer from iSumsoft Official site and install it on your Windows PC.
When installation is finished, launch RAR Password Refixer program.
Step 2: Import the encrypted RAR file.
1. Click Open button to select your password encrypted RAR file. Then, click Open button to add it into the program.
Step 3: Select one password attack type.
An appropriate attack type will make this program crack RAR file password more effectively. It’s recommended to try theВ Dictionary attack method before proceeding to theВ Brute-force attackВ method. To speed up the password recovery process, see: How to set different kinds of parameters for password recovery attack type.
Step 4: Start to recover RAR file password.
After selecting attack type, click Start button to start decrypting RAR file password.
Once your password has been recovered, the program clearly notifies you of the results. Just need to click Copy button and then paste the password to unlock your encrypted RAR file and then extract the files in it.
Step 5: Unlock encrypted RAR file.
Now you are able to open the password-protected RAR file with the recovered password.
RAR Password Refixer is specialized RAR password recovery software, which can help crack the RAR fileвЂ™s unknown password, or recover RAR file password when you forgot or lost it. It is such a program that makes it possible and easy to unlock encrypted RAR files without password. Most important are no virus and no data will be lost while cracking or recovering password for encrypted RAR files.
How to open a RAR/WinRAR file which was protected with a unknown password? This article descrides how to crack RAR file password via powerful attack method.
For RAR has a strong password protection mechanism including AES encryption technology that common method cannot cack the password. If you set a password to protect your rar archives, it cannot be removed even you know the password. What we can do is to extract all files in it and then repack them in a new rar file with no password. But, a problem appears: What can we do when forgot rar file password? I cannot repack it because I lost the password. Many people worked hard on finding a Winrar Password Remover but failed. In fact, currently there is no WinRAR Password Remover was developed by any people.
However, we can use Daossoft RAR Password Recovery to quickly crack RAR/WinRAR password. This is a powerful password recovery tool proved available and fast to recover RAR/WinRAR archives password. It can recover any complex password in an acceptable time. Supports cracking the latest RAR encryption technologies.
Step1. Purchase RAR Password Recovery full version and install it on your computer.
Free trial version can be download from our website. It can crack any password which was made up with less than three symbols and help users to check out all the features of RAR Password Recovery.
Step 2. Run the software and click Open button add a RAR file which you want to crack its password.
Open File Dialog appears, choose your target RAR file and click «Open».
Step2. Choose an attack solution for cracking RAR password.
There are four useful attack solutions in our program: Brute-force Attack, Mask Attack, Dictionary Attack and Smart Attack. You can choose one for your cracking. Note that the current version cannot run two or above solutions at the same time.
Step 3. Select appropriate attack settings and click Start button to begin cracking password.
Solution 1: If you choose Brute-force Attack, the program will try all possible combinations in the specified Range which you can select by yourself. Available options under Brute-force mode: caps latin, small latin, digits, special symbol, space, all printable and password lenth. For example, if you still remember that your password was made up with 6 characters and for digits only, you can select digits for the range and set lenth range in Lenth Option. These options can greatly reduce the cracking time.
You can change the password length on «Length» option. Tpye in two number to define the lenth range.
Minimal password length: Set the minimum length of password to search.
Maximal password length: Set the maximum length of password to search
When you complete all settings, click Start button on menubar to start cracking RAR fle password and the program will find out the original password for you automatically!
Soluton 2: If you choose Mask Attack, you have to give the symbols you remembered, replace the unkown symbols with «?«. Such as ac. ab. Caps latin, small latin, digits, special symbol, space, all printable and password lenth options are also available under Mask Attack mode.
When finish setting, click Start button and the program will search three characters combinations instead of seven and recover your password more faster.
Option 3: Dictionary Attack: Because a name or word was usually used as a password. This Attack verifies the frequently-used words stored in the specified Dictionary File. We has supplied a small Dictionary File containing common English words. You also can create one yourself.
Select your desired dictionary file. In addition, you can select an option «Smart mutations» or «Try all possible upper/lower case combinations«. Then click Start button to start searching. If one of those Words matches your password, the program will display it for you and you can use it to open your RAR file.
Solution 4: Smart Attack: Under Smart Attack mode, all range and lenth options are set by default. RAR Password Recovery will try all possible character combinations untill find the original password.
Simply choose Smart Attack from pull-down list and click вЂњStartвЂќ button to start cracking rar password.
Step 5. For a moment, the original password will be successfully recovered, and displayed in the dialog box. Copy it and use it to open the protected rar file.
In Addition: How to Register RAR Password Recovery?
Click buy now button on our website and complete the payment. You will recieve an email with registration code and retail version in it. Install the retail version and run it, click Help | Register, type in your registration code and click Register.
How secure is Winzip and Winrar encryption?
Both programs WinZip and WinRar use AES (Advanced Encryption Standard) for encryption, when implemented correctly and in conjunction with a long alphanumerical hard to guess passphrase, the AES cipher is impossible to crack in a reasonable amount of time, that means in your lifetime.
State sponsored agencies are also not able to crack a password protected Zip or Rar file if this has been encrypted with a hard to guess pass, the law of mathematics just like the law of physics, is equal for everyone.
Recovering a password protected .zip or .rar file
The only known method to recover a forgotten password from a password protected .zip or .rar file created using the latest WinZip and WinRar versions, is to use a brute force attack. In a brute force attack an automated software will use up all of the dictionary words and run all of them attempting to match the file password.
Knowing if special characters and numbers were used in the passphrase, as well as knowing the length of the password, is very helpful while setting up the program to launch a brute force attack against the encrypted .zip or .rar file.Cracking a .zip file protected with encryption can take minutes, months or a hundred years, depending on processing power and how hard to guess the password is.
Services to crack encrypted .zip files
CloudCracker : A cloud based service for cracking WPA/WPA2 keys, CloudCracker offers brute force dictionary attacks against password hashes, wireless network keys and password protected documents, you could do this yourself in your computer but this service gives you access to an online cluster speeding up the process.
PWCrack : This password cracking service covers .zip encrypted files and PKZip files. Normally they will test a dictionary attack and brute force passwords up to 7 characters long.Password Crackers Inc. also offers services to crack many more different kind of encrypted files.
ElComSoft distributed password recovery
Software to crack password protected .zip files
Advanced Archive Password Recovery : This commercial software from ElComSoft helps you crack .zip and .rar encrypted files. They claim cracking archives created with WinZip 8.0 and earlier is possible in under one hour by exploiting an implementation flaw. For.zip or .rar files encrypted using the AES algorithm a brute force attack will be launched.
Passware Kit Enterprise : This a professional solution and not targeted to end users. Password Kit Enterprise supports cracking of multiple different files, from encrypted .zip and .rar up to launching brute force attcks on fully encrypted disks using TrueCrypt. Passware Kit EnterPrice can use multiple core CPUs and nVidia GPUs to speed up the dictionary attacks.
LastBit : This company makes a full range of password recovery software to help you bring back forgotten passwords on ICQ, Skype, Firefox, PDF, PowerPoint, Zip and many more applications. Various Lastbit products support rainbow tables which considerably speeds up dictionary attacks.
Zip Password Tool : An easy to use password recovery tool that works launching dictionary attacks on encrypted ZIP compatible software. It supports AES file encryption cracking and you can customize the brute force attack with special characters and national symbols, there is also a password recovery progress bar.
Zip Password Tool cracking .zip password
Tips to help you recover passwords from encrypted files
The following information will be of great use when launching a brute force or dictionary attack against any kind of password protected file or disk.
Find all the other passwords you can from the PC, notes around the computer and things someone might have saved in their web browsers and the Windows password, many people use the same or similar passwords everywhere.
By collecting all of the user passwords you will be able to observe a password pattern, like how many characters are normally used to create a password, names of cities, pets or family members being used, capitalizing of the first letter, etc, you can then customize your cracking software and set it up to use the same password pattern that the user normally adopts.
WinZip does not hide the encrypted filenames, you should be able to list them, unless they packed an archive inside an archive, that might give you a clue about the contents and whether it is worth to try and crack it or not. Notice that WinRar however, has an option where the user can encrypt the filenames, although this is not active by default and a checkbox needs to be ticked.
Cracking Zip file encryption from versions earlier than WinZip9.0 is easy and there is no need for a brute force attack as there was an implementation flaw in the encryption. Since WinZip version 9 and above .zip files are protected using 128 or 256 bit AES and with a sufficiently complicated password finding it out will be impossible.
Dictionary attacks for a long password with characters outside of 0-9 and A-Z are very slow, when you plan a dictionary attack on an encrypted .zip or .rar file, limit the yourself to alphanumeric unless you are certain a special character was used to create the password.
Another approach is to scan the disk for all words and then try them in different upper and low case combinations against the encrypted file.
Conclusion about security of encrypted .zip and .rar files
The latest versions of WinZip and WinRar both use AES128 or 256 bit for encryption, this cipher is a security standard and safe from cracking as long as the password is sufficiently long and contains upper and lowercase letters, special characters and numbers.
The weakest link in .zip and .rar encrypted passwords is you, avoid reusing your passwords anywhere else and writing them down, with the exception maybe being a password manager you trust.
Make sure that you only encrypt .zip and .rar files with WinZip9.0 and above and Winrar3.0 and above as earlier versions have some vulnerability.
There are many companies out there promising to crack files encrypted with WinZip and WinRar, and they all rely on the same, either you using an old version of the file compression software, or you choosing a weak and easy to guess password, as long as you cover those two vulnerabilities, you are safe using WinZip or WinRar for encryption, my first choice would be WinRar since WinZip does not support file name encryption.