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How to recover info from a backup file (extension .bak)

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#1 lanz80


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Posted 11 January 2017 - 08:58 PM

Hi guys,
One day  I did a backup of a folder of data of my mobile that I have in my PC. The fact is that now I want to retrieve that info.
But I do not know how I can open it, because I do not remember which program I did the backup.
Is there a program that opens backup files, in a universal way / or how can I open the file?
Regards and thanks in advanced

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#2 Crazy Cat

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Posted 11 January 2017 - 11:25 PM

Download HxD Hex Editor from https://www.bleepingcomputer.com/download/hxd-hex-editor/ and open the .bak file. The first 20 bytes should identify the file.

5 Tools To Help Identify Unrecognized or Unknown File Types. https://www.raymond.cc/blog/what-file-is-that-how-to-identify-unrecognized-files-types-and-format/

What is a BAK File. https://www.lifewire.com/bak-file-2619793
A BAK file can literally be any type of file. These files are usually created on a periodic basis by programs to prevent total file loss in the event of a program or system crash. Opening files of this type requires a user to identify which application created the file.

BAK File Analysis Tool. In seconds, you will learn exactly what type of BAK file you have, the software program associated with your file, the publisher who created it, its security safety status, and a variety of other useful information. http://www.solvusoft.com/en/file-extensions/file-extension-bak/

Two things are infinite: the universe and human stupidity; and I'm not sure about the universe. ― Albert Einstein ― Insanity is doing the same thing, over and over again, but expecting different results.



#3 Didier Stevens

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Posted 04 May 2017 - 11:14 AM

The file command on Linux and OSX will tell you what file it is.

On Windows, you can install the file command: http://gnuwin32.sourceforge.net/packages/file.htm

Didier Stevens

SANS ISC Senior Handler
Microsoft MVP 2011-2016 Consumer Security, Windows Insider MVP 2016-2019


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