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#1 Bijan Kharbangar

Bijan Kharbangar

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Posted 14 February 2014 - 12:23 AM

I am proud to be an element of the most trusted technical guidance stream, Bleeping Computer.

A great help from it at times of need............is a real guide indeed.

 

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Assistance : -

I followed your article http://www.bleepingcomputer.com/virus-removal/cryptorbit-ransomware-information

Please tell me how can we decrypt files created with COREL DRAW and ADOBE PHOTOSHOP with file extension .cdr and .psd



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#2 cryptorbeaten

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Posted 27 February 2014 - 09:59 AM

Hello, I had a similar problem, working with some .notebook files that I had to decrypt.

 

So I fiddled a bit around with a hexeditor and found a workaround: I replaced the first 512 bits of the damaged file with 512 bits from a file of the same file type, but a file that wasn't damaged.

 

Now this may cause a some other issues, but in my case it worked pretty well, so I wrote a program in java that takes all files from a certain folder and replace the first 512 bits with some bits that you specify.

 

If you want to try it out, here's a link to the source code:

http://pastebin.com/gg9XvZxP

 

Basically what you do is place all the damaged files in certain folder, and find the 512 bits of a working file (I used HxD for this).

When you copy it straight out of HxD it gives you a hex string with whitespace, my program doesn't work around this, so perhaps use something like this site first:

 

http://www.miniwebtool.com/remove-spaces/

 

If you have any issues, please don't hesitate to write.

 

Disclaimer:

Only do this on backed up files, since I cannot guarantee that this works.






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