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How can I recovery data from FAT w/o FAT and Directory enty

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(@drugfish)
Active Member
Joined: 16 years ago
Posts: 13
Topic starter  

hellow.

I have a question. hehe
I'm tying DFRWS 2008 RODEO now. I mounted Thumbdrive image file to EnCase. But I couldn't see any FAT and DIRECTORY Entries. there was nothing but 0's in place where should be FAT and Directory entry.
How can I recovery data(files) from that Thumbdrive image file?
I have a EnCase v6. Is that helpful?

the point is that I don't know what I should do first and where I should look for.

please give me some advices.

THANK FOR YOUR HELP! )


   
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(@mscotgrove)
Prominent Member
Joined: 17 years ago
Posts: 940
 

There are two possible ways to recover from a FAT disk with no directory, or FAT

The first is to scan the disk for clusters which are directories. This requires analysing the cluster to determine that it is a directory. By determining the cluster size and location of cluster 2 (this can be be done from any 2 .. directory entries) you can work out file names, and for FAT32, possible start locations

The other approach is straight carving looking for file signatures.

With both approaches it will be necessary to handle fragmented files with special routines, or by hand.


   
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(@memon)
Active Member
Joined: 16 years ago
Posts: 13
 

This is the classic file carving problem. To learn more about file carving look at the forensicswiki entry http//www.forensicswiki.org/wiki/File_Carving where there are links to many tools for carving.

Additional tools are listed in the wikipedia entry http//en.wikipedia.org/wiki/File_carving for carving fragmented files.

You can also find papers on techniques that were able to carve all the DFRWS 06 and DFRWS 07 challenges even though the files were significantly fragmented at http//isis.poly.edu/projects/evidence


   
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