The program will not crack, bypass a Excel edit/modify restriction password. It uses a brute force recovery method, Smart attack but can also use a dictionary attack if you have a dictionary file. It has served countless clients thus it clearly reflects the goodwill of the tool in terms of market value.
What is password cracking?Password cracking process involves recovering a password from storage locations or from data, transmitted by a computer system on network. Password cracking term refers to group of techniques used to get password from a data system.
Purpose and reason of password cracking includes gaining an unauthorized access to a computer system or it can be recovery of forgotten password. There might be another reason of using password cracking technique that is for testing password strength so hacker could not hack into system.
Password cracking is normally performed thought repetitive process in which computer applies different combinations of password till the exact match.
Brute Force Password Cracking:Term brute force password cracking may also be referred as brute force attack. Brute force password cracking is respective process of guessing password, in this process software or tool creates a large number of password combinations. Basically it’s a trail-and-error technique used by software to obtain password information from system.
A brute force attack are normally used by hackers when there is no chance of taking advantage of encrypted system weakness or by security analysis experts to test an organization’s network security .This method of password cracking is very fast for short length passwords but for long length passwords dictionary attack technique is normally used.
Time taken by brute force password cracking software to crack password is normally depend upon speed of system and internet connection.
GPU Password Cracking:GPU is graphics processing unit, sometimes also called visual processing unit. Before talking about GPU password cracking we must have some understanding about hashes. When user enter password the password information stored in form of computer hashes using the one-way hashing algorithm.
In this password cracking technique using GPU software take a password guess and look through hashing algorithm and compare it or match it with the existing hashes till the exact match.
GPU can perform mathematical functions in parallel as GPU have hundreds of core that gives massive advantage in cracking password. GPU is much faster than CPU so that’s the reason of using GPU instead of CPU.
CUDA Compute Unified Device Architecture is a model for programming and a platform that perform computations in parallel, created by NVIDIA for graphic processing.
CUDA Password cracking includes cracking passwords using Graphics card which have GPU chip, GPU can perform mathematical functions in parallel so the speed of cracking password is faster than CPU.GPU have many 32bit chips on it that perform this operation very quickly.
We can easily access CUDA through libraries, directives and with the help of different programming languages that includes C, C++ and FORTRAN.
Password Cracking ToolsGiven below is the list of Top10 Password cracking tools.
Cain & Abel is one of the top cracking tool for password cracking and password recovery for Windows OS.
Cain & Abel can use techniques of Dictionary Attack, Brute-Force and Cryptanalysis attacks to crack encrypted passwords. So it only uses the weakness of system to crack password. GUI Interface of software is very simple and easy to use. But have availability limitation, tool only available for window based systems .Cain & Abel tool have many good features some of the features of tool are discussed below:
Features of Cain & Abel:John the Ripper is a free multi or cross platform password cracking software. Its called multi platform as it combines different password cracking features into one package.
It’s primarily used to crack weak UNIX passwords but also available for Linux, Mac, and Windows. We can run this software against different password encryptions including many password hashes normally found in different UNIX versions. These hashes are DES, LM hash of Windows NT/2000/XP/2003, MD5, and AFS.
Features of John the RipperAircrack is a combination different tools used for Wifi, WEP and WPA passwords cracking. With the help of these tools you can crack WEP/WPA passwords easily and effectively
Brute force, FMS attack, and dictionary attacks techniques can be used to crack WEP/WPA passwords. Basically it collects and analyzes encrypted packets then using its different tool crack password out of the packets. Although aircrack is available for Windows but there are different issues with this software if we use this in Windows environment, so it’s best when we use it in Linux environment.
Features of AircrackTHC Hydra is a supper fast network password cracking tool. It uses network to crack remote systems passwords.
It can be used to crack passwords of different protocols including HTTPS, HTTP, FTP, SMTP, Cisco, CVS, SQL, SMTP etc. It will give you option that you may supply a dictionary file that contains list of possible passwords. It’s best when we use it in Linux environment.
Features of THC HydraSite for Download:
https://www.thc.org/thc-hydra/RainbowCrack software uses rainbow tables to crack hashes, in other words we can say it uses process of a large-scale time-memory trade for effective and fast password cracking.
Large-scale-time-memory-trade-off is a process of computing all hashes and plain text using a selected hash algorithm. After calculations, obtained results are stored in the tables called rainbow table. Process of creating rainbow tables is very time consuming but when its done software works very fast.
Password cracking using rainbow table is faster than the normal brute force attack method. It’s available for Linux and Windows operating system.
Features of Rainbow CrackSite for Download:
OphCrack used to crack Windows user passwords with the help of rainbow tables that are available in a bootable CD.
Ophcrack is completely free to download, Windows based password cracker that uses rainbow tables to crack Windows user passwords. It normally cracks LM and NTLM hashes. Software has simple GUI and can runs on different platforms.
Features of OphCrackSite for Download:
http://ophcrack.sourceforge.net/Brutus is the fastest, most flexible, and most popular software used to crack remote system passwords. It guess password through applying different permutations or by using a dictionary.
It can be used for different network protocols including HTTP, FTP, IMAP, NNTP and other types such as SMB, Telnet etc. It also gives you facility of creating your own authentication type. It also includes extra options of load and resume, so process can be paused when required and you can resume process when you want.
It is only available for windows operation systems. Tool has a limitation that it has not been updated since 2000.
Features of Brutus
Site for Download:
Just like OphCrack tool L0phtCrack is also a Windows passwords recovery tool uses hashes to crack passwords, with extra features of Brute force and dictionary attacks.
It normally gains access to these hashes from directories, network servers, or domain controllers. It is capable of doing hash extraction from 32 & 64 bit Windows systems, multiprocessor algorithms, scheduling, and can also perform decoding and monitoring networks. Yet it is still the easiest to use password auditing and recovery software available.
Features of L0phtCrack
Site for Download:
Pwdump is actually different Windows programs that are used to provide LM and NTML hashes of system user accounts.
Pwdump password cracker is capable of extracting LM, NTLM and LanMan hashes from the target in Windows, in case if Syskey is disabled, software has the ability to extract in this condition.
Software is update with extra feature of password histories display if history is available. Extracted data will be available in form that is compatible with L0phtcrack.
Recently software is updated to new version called Fgdump as Pwdump not work fine when any antivirus program is running.
Features of Pwdump
Site for Download:
Medusa is remote systems password cracking tool just like THC Hydra but its stability, and fast login ability prefer him over THC Hydra.
It is speedy brute force, parallel and modular tool. Software can perform Brute force attack against multiple users, hosts, and passwords. It supports many protocols including AFP, HTTP, CVS, IMAP, FTP, SSH, SQL, POP3, Telnet and VNC etc.
Medusa is pthread-based tool, this feature prevent unnecessarily duplicate of information. All modules available as an independent .mod file, so no modification is required to extend the list that supports services for brute forcing attack.
Features of Medusa
Site for Download: