Often Web sites advise users to choose memorable passwords such as birthdays, names of friends or family, or social security numbers. This is extremely poor advice, as such passwords are easily guessed by an attacker who knows the user. The most common way an attacker will try to obtain a password is through the dictionary attack’. In a dictionary attack, the attacker takes a dictionary of words and names, and tries each one to see if it is the require password. This can be automated with programs which can guess hundreds or thousands of words per second. This makes it easy for attackers to try variations: word backwards, different capitalization, adding a digit to the end, and popular passwords.
Webcracker allows the user to test a restricted-access website by testing id and password combinations on the web site.This program exploits a rather large hole in web site authentication methods. Password protected websites may be easily brute-force hacked, if there is no set limit on the number of times an incorrect password or User ID can be tried.WebCracker is a simple tool that takes text lists of usernames and passwords and uses them as dictionaries to implement Basic authentication password guessing.
Brutus is an online or remote password cracker. More specifically it is a remote interactive authentication agent. Brutus is used to recover valid access tokens (usually a username and password) for a given target system. Examples of a supported target system might be an FTP server, a password protected web page, a router console a POP3 server etc. It is used primarily in two ways:
ObiWaN stands for “Operation burning insecure Web server against Netscape”. It is called Project 2086 now, after 2068 the number of the RFC which describes the HTTP/1.1 protocol. 11.1 is the section which describes the basic authentication scheme. This is the mostly used authentication scheme for web server and used by ObiWaN.
./ObiWaN -h intranet -a eccouncil -w list.txt
./ObiWaN -h intranet -a eccouncil -w list.txt -A 2
./ObiWaN -h intranet -a eccouncil -w list.txt -b 6 -B 8
Munga Bunga’s HTTP Brute Forcer is a utility utilizing the HTTP protocol to brute force into any login mechanism/system that requires a username and password, on a web page (or HTML form). To recap – A password usually only contains letters. In such a case the quantity of characters in a charset is 26 or 52, depending on usage of registers – both of them or just one. Some systems (Windows, for example) don’t make any difference between lower-case and uppercase letters. With an 8-characters’ long password the difference would amount to 256 times, which is really significant.
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