crackxls2003 0.4

A free and open source command-line tool for easily cracking encrypted XLS files

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What's new in crackxls2003 0.4:

  • This release allows testing a suspected password for a file.
  • Additionally, the Windows executable provided will work on more computers.
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GPL v3 
5.0/5 1
Gavin Smith
ROOT \ Security
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crackxls2003 - Cracking an encrypted XLS file with the crackxls2003 tool
crackxls2003 is an open source command-line software specially designed to break the encryption on Microsoft Excel and Microsoft Word 97/2000/2002/2003 files encrypted using the RC4 method, which use a 40-bit-long key.

The application will try to crack the XLS file and present a working key if it finds one. It doesn't work on files encrypted using Excel or Word 2007 or later. Additionally, it will not work with files that were encrypted with a non-standard method.

To use the program, simply execute ./crackxls2003 [filename.xls]. To restart the cracking process, use ./crackxls2003 -s "00 00 00 00 00" file.xls.

Users are advised that the program is extremely slow, as on some computers will take even a month to check through the whole key-space and decrypt the files.

Last updated on September 20th, 2013

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