Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
The Sleuth Kit Brian Carrier Set of tools to analyze device images Free & Open Source ● http://Sleuthkit.org ● http://wiki.sleuthkit.org Image File Tools Image File Tools This layer contains tools for the image file format. For example, if the image format is a split image or a compressed image. img_stat: tool will show the details of the image format img_cat: This tool will show the raw contents of an image file. Disk Tools Disk Tools These tools can be used to detect and remove a Host Protected Area (HPA) in an ATA disk. A HPA could be used to hide data so that it would not be copied during an acquisition. These tools are currently Linux-only. disk_sreset: This tool will temporarily remove a HPA if one exists. After the disk is reset, the HPA will return. disk_stat: This tool will show if an HPA exists. Volume System Tools Volume System Tools These tools take a disk (or other media) image as input and analyze its partition structures. Examples include DOS partitions, BSD disk labels, and the Sun Volume Table of Contents (VTOC). These can be used find hidden data between partitions and to identify the file system offset for The Sleuth Kit tools. The media management tools support DOS partitions, BSD disk labels, Sun VTOC, and Mac partitions. mmls: Displays the layout of a disk, including the unallocated spaces. mmstat: Display details about a volume system (typically only the type). mmcat: Extracts the contents of a specific volume to STDOUT. File System Tools File System Layer Tools These file system tools process general file system data, such as the layout, allocation structures, and boot blocks fsstat: Shows file system details and statistics including layout, sizes, and labels. File Name Layer Tools File Name Layer Tools These file system tools process the file name structures, which are typically located in the parent directory. ffind: Finds allocated and unallocated file names that point to a given meta data structure. fls: Lists allocated and deleted file names in a directory. Meta Data Layer Tools Meta Data Layer Tools These file system tools process the meta data structures, which store the details about a file. Examples of this structure include directory entries in FAT, MFT entries in NTFS, and inodes in ExtX and UFS. icat: Extracts the data units of a file, which is specified by its meta data address (instead of the file name). ifind: Finds the meta data structure that has a given file name pointing to it or the meta data structure that points to a given data unit. ils: Lists the meta data structures and their contents in a pipe delimited format. istat: Displays the statistics and details about a given meta data structure in an easy to read format. Data Unit Layer Tools Data Unit Layer Tools These file system tools process the data units where file content is stored. Examples of this layer include clusters in FAT and NTFS and blocks and fragments in ExtX and UFS. blkcat: Extracts the contents of a given data unit. blkls: Lists the details about data units and can extract the unallocated space of the file system. blkstat: Displays the statistics about a given data unit in an easy to read format. blkcalc: Calculates where data in the unallocated space image (from blkls) exists in the original image. This is used when evidence is found in unallocated space. Image File Tools ● img_stat - displays details about the disk image img_stat Image Formats img_stat In Action IMAGE FILE INFORMATION -------------------------------------------Image Type: raw Size in bytes: 2000683008 Media Management Tools ● mmls – displays the layout of the disk – Locates the various partitions Image Types Volume Types In Action ● Image type ● Sector size ● Partition tables ● Partition start, end, length, and type ● Shows unallocated space as separate entries ● Slot for multiple partition tables as in extended partitions This is the Partition Number sansforensics@SIFT-laptop:/cases/RED$ mmls red.001 DOS Partition Table Offset Sector: 0 Units are in 512-byte sectors 01: 02: 03: 04: Slot ----00:00 00:01 ----- Start 0000000000 0000000062 0001922000 0003905504 End 0000000061 0001921999 0003905503 0003907583 Length 0000000062 0001921938 0001983504 0000002080 Description Unallocated Win95 FAT32 (0x0C) NTFS (0x07) Unallocated Media Management Tools ● mmcat - extracts the contents of specific partition in an image – Copies to a separate file – Get offset, type, sector size etc. from mmls – part_num: from column #1 in mmls In Action sansforensics@SIFT-laptop:/cases/REDD$ mmcat red.001 2 > fat.red In Action sansforensics@SIFT-laptop:/cases/REDD$ mmcat red.001 3 > ntfs.red Details of a File System ● fsstat fat.red –Must be given an image of the partition. Extracted using ● –For ● example: fat.red or ntfs.red However if you know the offset –fsstat -o 62 red.001 works also fsstat – FAT Part 1 fsstat – FAT Part 2 fsstat – NTFS Part 1 fsstat – NTFS Part 2 fls – File/Dir Listings ● List all directories and files in an image – Inodes or MFT entries, etc. – Full path ● List file types ● List MAC dtg's ● Lists deleted or undeleted files only fls - Usage fls in Action Get the correct offset to the correct partition. These are the FAT entries. fls in Action Get the correct offset to the correct partition. These are the MFT entries. istat – Usage (FAT) ● Lists details of a metadata structure ● istat – inode # (mft #, FAT entry)statistics – File attributes – File name – Size – MAC Times (FAT), (NTFS), both $SA, $FILE_NAME – Sectors allocated, $DATA info istat in Action with FAT istat in Action with NTFS ffind - Owner of a data block ● Finds the name of the file or directory using a given inode, FAT entry, or MFT entry ● -a: all occurances ● -d: deleted entries only ● -u: undeleted entries only ffind – in Action icat – Display a File ● Output the contents of a file based on its inode number ● ● ● Usual calling parameters -r: recover deleted file -s: displays slack space at end of file icat – in action icat – in action icat – in action Grabbing the MFT for analyseMFT