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FOREMOST(1)		    General Commands Manual		   FOREMOST(1)

NAME
       foremost	 - Recover files using their headers, footers, and data	struc-
       tures

SYNOPSIS
       foremost[-h][-V][-d][-vqwQT][-b<blocksize>][-o<dir>]
       [-t<type>][-s<num>][-i<file>]

BUILTIN	FORMATS
       Recover	files  from  a disk image based	on file	types specified	by the
       user using the -t switch.

       jpg    Support for the JFIF and Exif formats including  implementations
	      used in modern digital cameras.

       gif

       png

       bmp    Support for windows bmp format.

       avi

       exe    Support  for Windows PE binaries,	will extract DLL and EXE files
	      along with their compile times.

       mpg    Support for most MPEG files (must	begin with 0x000001BA)

       mp4

       wav

       riff   This will	extract	AVI and	RIFF since they	use the	same file for-
	      mat (RIFF). note faster than running each	separately.

       wmv    Note may also extract -wma files as they have similar format.

       mov

       pdf

       ole    This  will grab any file using the OLE file structure.  This in-
	      cludes PowerPoint, Word, Excel, Access, and StarWriter

       doc    Note it is more efficient	to run OLE as you get  more  bang  for
	      your  buck.   If you wish	to ignore all other ole	files then use
	      this.

       zip    Note is will extract .jar	files as well because they use a simi-
	      lar  format.   Open Office docs are just zip'd XML files so they
	      are extracted as well.  These include SXW, SXC, SXI, and SX? for
	      undetermined  OpenOffice	files.	Office 2007 files are also XML
	      based (PPTX,DOCX,XLSX)

       rar

       htm

       cpp    C	source code detection, note this is primitive and may generate
	      documents	other than C code.

       all    Run  all	pre-defined  extraction	 methods. [Default if no -t is
	      specified]

DESCRIPTION
       Recover files from a disk image based on	headers	and footers  specified
       by the user.

       -h     Show a help screen and exit.

       -V     Show copyright information and exit.

       -d     Turn  on indirect	block detection, this works well for Unix file
	      systems.

       -T     Time stamp the output directory so you don't have	to delete  the
	      output dir when running multiple times.

       -v     Enables verbose mode. This causes	more information regarding the
	      current state of the program to be displayed on the screen,  and
	      is highly	recommended.

       -q     Enables quick mode. In quick mode, only the start	of each	sector
	      is searched  for	matching  headers.  That  is,  the  header  is
	      searched	only  up to the	length of the longest header. The rest
	      of the sector, usually about 500 bytes, is  ignored.  This  mode
	      makes  foremost run considerably faster, but it may cause	you to
	      miss files that are embedded in other files. For example,	 using
	      quick  mode you will not be able to find JPEG images embedded in
	      Microsoft	Word documents.

	      Quick mode should	not be used when examining NTFS	file  systems.
	      Because  NTFS  will store	small files inside the Master File Ta-
	      ble, these files will be missed during quick mode.

       -Q     Enables Quiet mode. Most error messages will be suppressed.

       -w     Enables write audit only mode.  No files will be extracted.

       -a     Enables write all	headers, perform no error detection  in	 terms
	      of corrupted files.

       -b number
	      Allows  you to specify the block size used in foremost.  This is
	      relevant for file	naming and quick  searches.   The  default  is
	      512.	 ie.  foremost -b 1024 image.dd

       -k number
	      Allows you to specify the	chunk size used	in foremost.  This can
	      improve speed if you have	enough RAM to fit the  image  in.   It
	      reduces  the  checking that occurs between chunks	of the buffer.
	      For example if you had > 500MB of	 RAM.	     ie.  foremost  -k
	      500 image.dd

       -i file
	      The  file	is used	as the input file.  If no input	file is	speci-
	      fied or the input	file cannot be read then stdin is used.

       -o directory
	      Recovered	files are written to the directory directory.

       -c file
	      Sets the configuration file to use. If none  is  specified,  the
	      file "foremost.conf" from	the current directory is used, if that
	      doesn't exist then "/usr/local/etc/foremost.conf"	is  used.  The
	      format  for  the	configuration file is described	in the default
	      configuration file included with this program. See the  CONFIGU-
	      RATION FILE section below	for more information.

       -s number
	      Skips  number  blocks  in	 the  input  file before beginning the
	      search for headers.	 ie.   foremost	 -s  512  -t  jpeg  -i
	      /dev/hda1

       CONFIGURATION FILE
	      The  configuration  file	is used	to control what	types of files
	      foremost	searches  for.	A  sample  configuration  file,	 fore-
	      most.conf,  is  included	with  this distribution. For each file
	      type, the	configuration file  describes  the  file's  extension,
	      whether  the  header  and	footer are case	sensitive, the maximum
	      file size, and the header	and footer for the  file.  The	footer
	      field  is	 optional, but header, size, case sensitivity, and ex-
	      tension are not!

	      Any line that begins with	a pound	sign is	considered  a  comment
	      and  ignored. Thus, to skip a file type just put a pound sign at
	      the beginning of that line

	      Headers and footers are decoded before use. To specify  a	 value
	      in   hexadecimal	 use   \x[0-f][0-f],   and   for   octal   use
	      \[1-9][1-9][1-9].	 Spaces	can be	represented  by	 \s.  Example:
	      "\x4F\123\I\sCCI"	decodes	to "OSI	CCI".

	      To  match	 any single character (aka a wildcard) use a ?.	If you
	      need to search for the ? character, you will need	to change  the
	      wildcard line *and* every	occurrence of the old wildcard charac-
	      ter in the configuration file. Do	not forget those hex and octal
	      values! ?	is equal to \x3f and \063.

	      There is a sample	set of headers in the README file.

EXAMPLES
       Search for jpeg format skipping the first 100 blocks
	      foremost -s 100 -t jpg -i	image.dd

       Only generate an	audit file, and	print to the screen (verbose mode)
	      foremost -av image.dd

       Search all defined types
	      foremost -t all -i image.dd

       Search for gif and pdf's
	      foremost -t gif,pdf -i image.dd

       Search  for  office  documents  and jpeg	files in a Unix	file system in
	      verbose mode.
	      foremost -vd -t ole,jpeg -i image.dd

       Run the default case
	      foremost image.dd

AUTHORS
       Original	Code written by	Special	Agent Kris Kendall and	Special	 Agent
       Jesse  Kornblum of the United States Air	Force Office of	Special	Inves-
       tigations.

       Modification by Nick Mikus a Research Associate at the Naval Postgradu-
       ate  School  Center  for	 Information  Systems Security Studies and Re-
       search.	The modification of Foremost was part of a masters  thesis  at
       NPS.

BUGS
       When  compiling	foremost  on  systems  with versions of	glibc 2.1.x or
       older, you will get some	(harmless) compiler warnings regarding the im-
       plicit  declaration  of	fseeko and ftello. You can safely ignore these
       warnings.

REPORTING BUGS
       Because Foremost	could be used to obtain	evidence for criminal prosecu-
       tions, we take all bug reports very seriously. Any bug that jeopardizes
       the forensic integrity of this program could have serious consequenses.
       When submitting a bug report, please include a description of the prob-
       lem, how	you found it, and your contact information.

       Send bug	reports	to:
       namikus AT users	d0t sf d0t net

COPYRIGHT
       This program is a work of the US	Government. In accordance with 17  USC
       105,  copyright protection is not available for any work	of the US Gov-
       ernment.

       This is free software; see the source for copying conditions.  There is
       NO  warranty;  not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.

SEE ALSO
       There is	more information in the	README file.

       Foremost	was  originally	 designed  to  imitate	the  functionality  of
       CarvThis,  a  DOS program written by the	Defense	Computer Forensics Lab
       in in 1999.

				v1.5 - May 2009			   FOREMOST(1)

NAME | SYNOPSIS | BUILTIN FORMATS | DESCRIPTION | EXAMPLES | AUTHORS | BUGS | REPORTING BUGS | COPYRIGHT | SEE ALSO

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