Difference between pages "Determining OS version from an evidence image" and "Libqcow"

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One of the first steps an examiners will need to carry out once they have an evidence image is to log system metadata, including OS version and patch level. This may be of particular importance if the image in question is from a machine that is suspected of having been compromised.
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{{Infobox_Software |
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  name = libqcow |
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  maintainer = [[Joachim Metz]] |
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  os = [[Linux]], [[FreeBSD]], [[NetBSD]], [[OpenBSD]], [[Mac OS X]], [[Windows]] |
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  genre = {{Disk imaging}} |
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  license = {{LGPL}} |
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  website = [http://code.google.com/p/libqcow/ code.google.com/p/libqcow] |
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}}
  
==Windows==
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The '''libqcow''' package contains a library and applications to read the [[QCOW_Image_Format | QEMU Copy-On-Write (QCOW) image]] format.
  
===Windows 95/98/ME===
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== Tools ==  
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The '''libqcow''' package contains the following tools:
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* '''qcowinfo''', which shows the information about QCOW files.
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* '''qcowmount''', which FUSE mounts QCOW image files.
  
Establish the boot volume, verify that it is a FAT file system, and locate the hidden text file \MSDOS.SYS. Locate the [Options]WinVer parameter:
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== Examples ==  
 
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{| class="wikitable"
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|-
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! WinVer
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! OS
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|-
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| 4.00.0950
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| Windows 95
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|-
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| 4.00.1111
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| Windows 95 OSR2
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|-
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| 4.03.1212
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| Windows 95 OSR2.1
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|-
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| 4.03.1214
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| Windows 95 OSR2.5
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|-
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| 4.10.1998
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| Windows 98
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|-
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| 4.10.2222
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| Windows 98 SE
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|-
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| 4.90.3000
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| Windows ME
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|}
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Alternatively, establish WinDir ([Paths]WinDir in \MSDOS.SYS), locate the %WINDIR%\SYSTEM.DAT registry file. Next, look up the registry key Software\Microsoft\Windows\CurrentVersion\, and values Version and VersionNumber. (Backup copies of SYSTEM.DAT may be found in .CAB files in %WINDIR%\SYSBCKUP.)
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===Windows NT4===
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===Windows 2000, XP, 2003, Vista ===
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Information about a running system can be displayed using the command `ver` (and `systeminfo` on some systems).
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During a forensic examination, information regarding the version of Windows can be found in a number of places.  For example, by default, the Windows directory on Windows XP is "C:\Windows", where on Windows NT and 2000, it was "C:\Winnt".  This is not definitive, however, because this directory name is easily modified during installation.
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Determining the version of Windows from the Software Registry Hive file - navigate to the ''Microsoft\Windows NT\CurrentVersion'' key, and examine the values beneath the key; specifically, values such as ProductName, CSDVersion, ProductId (if available), BuildLab, and on Vista, BuildLabEx.
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Determining the version of Windows from file version information - locate the file %WinDir%\system32\ntoskrnl.exe and review the file version information/strings from the resource section of the PE file.  You can view this information with a hex editor, or extract it using a variety of means.  There is a Perl module (Win32::File::VersionInfo) that will allow you to extract this information, and the Perl script [http://sourceforge.net/project/showfiles.php?group_id=164158&package_id=203967 kern.pl] illustrates a platform independent means of examining the PE header and ultimately locating the file version information.
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In order to determine the difference between Windows XP Professional and Home versions, look for the %WinDir%\system32\prodspec.ini file; it contains information regarding the Product type (either XP Pro or Home). Another way to do this is to look at Microsoft Product Code (first 5 digits of ''Product ID''). Some of these values:
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{| class="wikitable" border="1"
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|-
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!Value (MPC)!!Version
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|-
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|55034 || Windows XP Professional English
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|-
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|55683 || Windows XP Professional Russian
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|-
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|55681 || Windows XP Home Edition Russian
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|}
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=== Other ===
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* Windows 2008
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* Windows 7
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* Windows 8
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* Windows CE, Mobile
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Different editions per version?
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==Unix/Linux==
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Information about a running system, including the kernel version, can be displayed using the command `uname -a`. However, this is not much good if you performing dead analysis on a disk image.
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===Linux===
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A number of Linux distributions create a file in ''/etc'' to identify the release or version installed.
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FUSE mounting a QCOW image (libqcow 20111009 or later)
 
<pre>
 
<pre>
/etc/issue
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qcowmount image.qcow mount_point
/etc/issue.net
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</pre>
 
</pre>
  
{| class="wikitable" border="1"
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== History ==  
|-
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!Distro!!Tag
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|-
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|Red Hat || /etc/redhat-release
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|-
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|Debian  || /etc/debian-version
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|}
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=== (Open) Solaris ===
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===Free/Net/OpenBSD===
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A first indicator of the presence of a BSDs operating system is the partition table on a MBR-partitioned disk:
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{| class="wikitable" border="1"
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|-
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!OS!!Partition type
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|-
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|FreeBSD || FreeBSD (0xA5)
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|-
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|OpenBSD || OpenBSD (0xA6)
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|-
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|NetBSD || NetBSD (0xA9)
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|-
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|}
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You can get the release and version of BSDs operating system inside the kernel images, even with only a disk image.
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{| class="wikitable" border="1"
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|-
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!OS!!Kernel path
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|-
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|FreeBSD || /boot/kernel/kernel
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|-
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|OpenBSD || /bsd
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|-
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|NetBSD || /netbsd
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|-
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|}
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You can use <tt>strings</tt> and <tt>grep</tt> tools to find this information with <tt>strings kernel_path | grep os_name</tt>. (e.g.: <tt>strings /bsd | grep OpenBSD</tt>)
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===AIX===
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===HP/UX===
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===Other===
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Libqcow was created by [[Joachim Metz]] in 2010.
* BSDI
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==Other==
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== Also See ==
* Plan9
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[[QCOW_Image_Format | QEMU Copy-On-Write (QCOW) image format]]
* QNX RTOS
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* OS2
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* MacOS-X/IOS
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* DOS
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[[Category:Howtos]]
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== External Links ==
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* [https://code.google.com/p/libqcow/ Project site]
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* [https://code.google.com/p/libqcow/wiki/Building Building libqcow and tools from source]
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* [https://code.google.com/p/libqcow/wiki/Mounting Mounting a QCOW image]

Latest revision as of 00:29, 15 July 2013

libqcow
Maintainer: Joachim Metz
OS: Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, Windows
Genre: Disk imaging
License: LGPL
Website: code.google.com/p/libqcow

The libqcow package contains a library and applications to read the QEMU Copy-On-Write (QCOW) image format.

Contents

Tools

The libqcow package contains the following tools:

  • qcowinfo, which shows the information about QCOW files.
  • qcowmount, which FUSE mounts QCOW image files.

Examples

FUSE mounting a QCOW image (libqcow 20111009 or later)

qcowmount image.qcow mount_point

History

Libqcow was created by Joachim Metz in 2010.

Also See

QEMU Copy-On-Write (QCOW) image format

External Links