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I have a zip folder which I saved and password protected. I forgot the password but I know that the password is something like : BlueMonday!2012 or bluemonday2012

I know I can brute force the file but it would take too long with that many characters

Is there a software which what use a combination of these characters to find the password?

OS: Windows 8

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"Is there a software which [will] use a combination of these characters" - That is brute-forcing! If you meant "a combination of these words/terms", then perhaps a dictionary-based attack would work with a custom dictionary that contains only the words you want. –  Karan Jan 24 '13 at 6:11
    
Yes, I meant a combination of these letters. I don't want a custom "word dictionary" , but a custom letters dictionary, is that feasible? –  Conrad Jan 25 '13 at 18:03
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2 Answers

up vote 1 down vote accepted

There are many password recovery programs available (both free and paid) that allow you to specify a custom list of characters to be used for brute-force attacks, Advanced Archive Password Recovery being just one of them (albeit one I have used successfully):

  • Supports all versions of ZIP/PKZip/WinZip, RAR/WinRAR, as well as ARJ/WinARJ, and ACE/WinACE (1.x)
  • Guaranteed recovery of archives in under 1 hour for ZIP archives created with WinZip 8.0 and earlier and containing at least 5 files
  • Supports archives over 4 GB and self-extracting archives
  • Supports strong AES encryption found in WinRAR and the new versions of WinZip
  • Exploits all known vulnerabilities and implementation flaws in the various compression algorithms for faster recovery
  • Speedy known-plaintext attack recovers certain ZIP and ARJ archives in minutes (user must supply at least one unprotected file from that archive)
  • Interrupt and resume operation at any time
  • Supports background operation by utilizing idle CPU cycles only
  • Dictionary and brute-force attacks with user-defined masks and advanced templates
  • Highly optimized low-level code for optimum performance

1

You can select from predefined character sets or define a custom charset (this is what you want), as also select the word to start from, password mask, password length etc.

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Ultimate Zip Cracker can be used to build a custom attack with multiple custom dictionary words. It is expensive though.

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words or letters? OP said 'custom letters dictionary' in his comment at the top... Do you have a link to this? –  shub May 24 at 15:31
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