Cracking.

Password cracking tools.
How to create crack archive?
- .nfo
- .url
- FILE_ID.DIZ
- Crack intro.

Password cracking tools.

If look to password cracking competitions:

most used software are:

Hashcat suite
John the Ripper

http://hashcat.net/hashcat/: CPU based.
http://hashcat.net/oclhashcat/: GPU based.

How to create crack archive?

Use zip/rar. With rar you can use password protection.

Along with content provide these files:

.nfo - crack team logo, info about content, enjoy greeting.
.url - internet shortcut file.
FILE_ID.DIZ - plain text file containing brief content description of the archive in which it is included.

.nfo

Old .nfo use code page 437. New .nfo file use ISO-8859-1/ISO-8859-15 or Unicode UTF-8 characters.

http://en.wikipedia.org/wiki/.nfo: .nfo

.url

Internet shortcut file. Content like this:

[InternetShortcut]
URL=http://example.com/

See:

http://www.cyanwerks.com/file-format-url.html: An Unofficial Guide to the URL File Format, 3ed

FILE_ID.DIZ

FILE_ID stands for "file identification". DIZ stands for Description In Zipfile.

http://www.textfiles.com/computers/fileid.txt: v1.9 spec
http://en.wikipedia.org/wiki/FILE_ID.DIZ: FILE_ID.DIZ

A crack intro, also known as a cracktro, loader, or just intro, is a small introduction sequence added to cracked software, designed to inform the user of which "cracking crew" or individual cracker was responsible for removing the software's copy protection and distributing the crack.