Difference between revisions of "Thumbnails"

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Thumbnails are stored in ''thumbcache_NN.db'' files in different formats (e.g. [[BMP]]) and can be extracted using [[File Carving | file carving]]. There are several tools that can work with Vista Thumbcache: [http://www.dmthumbs.com/ dmThumbs], [http://www.janusware.com/fetch.php?page=412,2 Thumbs.db Viewer]. Unfortunately, there is no information in the thumbcache that can easily link thumbnails with original files in all cases. One of the ways to link thumbnails with original files is to use Windows Indexer (Windows.edb) database.
 
Thumbnails are stored in ''thumbcache_NN.db'' files in different formats (e.g. [[BMP]]) and can be extracted using [[File Carving | file carving]]. There are several tools that can work with Vista Thumbcache: [http://www.dmthumbs.com/ dmThumbs], [http://www.janusware.com/fetch.php?page=412,2 Thumbs.db Viewer]. Unfortunately, there is no information in the thumbcache that can easily link thumbnails with original files in all cases. One of the ways to link thumbnails with original files is to use Windows Indexer (Windows.edb) database.
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Thumbcache format is described [http://www.noxa.org/blog/?p=5 here].
  
 
[[Windows]] Vista will save thumbnails for files on a mounted encrypted filesystems (except [[Windows Encrypted File System | EFS]]).
 
[[Windows]] Vista will save thumbnails for files on a mounted encrypted filesystems (except [[Windows Encrypted File System | EFS]]).
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GNOME will save thumbnails for files on mounted encrypted filesystems.
 
GNOME will save thumbnails for files on mounted encrypted filesystems.
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== External Links ==
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=== Non-English ===
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* [http://itdefence.ru/content/articles/Thumbnails.Suhanov/ Использование централизованных баз данных экскизов для исследования графических файлов на зашифрованных разделах], ITDefence, 2009

Revision as of 13:40, 2 March 2009

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Further information might be found on the discussion page.

Thumbnails are reduced-size versions of pictures, serving the same role for images as a normal text index does for words.

Windows

See Thumbs.db.

Windows Vista

Thumbs.db no longer exists in Vista. This data has been moved to \Users\\AppData\Local\Microsoft\Windows\Explorer. This directory contains following files:

  • thumbcache_idx.db
  • thumbcache_32.db, thumbcache_96.db, thumbcache_256.db, and thumbcache_1024.db
  • thumbcache_sr.db

Thumbnails are stored in thumbcache_NN.db files in different formats (e.g. BMP) and can be extracted using file carving. There are several tools that can work with Vista Thumbcache: dmThumbs, Thumbs.db Viewer. Unfortunately, there is no information in the thumbcache that can easily link thumbnails with original files in all cases. One of the ways to link thumbnails with original files is to use Windows Indexer (Windows.edb) database.

Thumbcache format is described here.

Windows Vista will save thumbnails for files on a mounted encrypted filesystems (except EFS).

KDE & GNOME

KDE and GNOME are popular desktop environments for Linux and UNIX platforms. They are storing thumbnails in ~/.thumbnails.

Example thumbnail in GNOME:

$ hachoir-metadata .thumbnails/normal/0d97afdc637ac86d75d13e72172dc77c.png
Metadata:
- Image width: 128 pixels
- Image height: 122 pixels
- Bits/pixel: 24
- Pixel format: RGB
- Compression rate: 1.6x
- Compression: deflate
- Producer: GNOME::ThumbnailFactory
- Comment: Thumb::Image::Width=779
- Comment: Thumb::Image::Height=744
- Comment: Thumb::URI=file:///media/truecrypt1/123.jpg
- Comment: Thumb::MTime=1216153400
- MIME type: image/png
- Endian: Big endian

GNOME will save thumbnails for files on mounted encrypted filesystems.

External Links

Non-English