Archive for July, 2013

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Linux Computer Forensics: Deft Linux 8.0b

08/07/2013
Deft Linux 8.0b is out and it's looking great.

Deft Linux 8.0b is out and it’s looking great.

A month or so ago I did a walk-through of some simple computer forensics using Deft 7 Linux (Carve and Sift: My Primer to Linux Computer Forensics). There have been several other versions of this distro to come out since then, but now that the beta for 8.0b has been released publicly, it marks a slight shift in the way Deft handles.

While my previous guide is still valid, there are a few additions that really place this version above its predecessors. Now, I’m not going to go through every change, you can do that by going to their website, but there are some really neat features that I’d like to point out.

New Feel

The first thing that will hit you when you start Deft 8.0b is the new layout. While the base operating system is still Ubuntu (Lubuntu to be precise) the LXDE desktop has been further customized from its 7.x version and now looks and feels like its own OS rather than a 1-off from an Ubuntu derivative. The menu is themed for Deft 8.0 with a little 8-ball and more icons have been added to the bottom panel.

The Desktop is more reserved and better organized.

The Desktop is more reserved and better organized.

[Screenshot of Deft 7]
(Opens in a New Window)

The desktop still has the LXTerminal (a must) and the evidence folder, but gone is the “Install” option. Since this is a beta version it is unclear whether this is gone forever or if it will be back later. 8.0b is certainly installable as the boot menu attests.

Guymanager, a very nice disk managing/imaging tool, has been added as well as the file manager for quick access. You’ll see in my screenshots that there is a “Get Screenshot” icon on the desktop, but that was added by me for this article and is not default.

The menu panel is almost entirely new, with only LxKeyMap being carried over with the standard desktop selector. There is a whole host of new software moved in, some from previous versions of Deft but were housed in the menu (like Autopsy) or on the command line. All-in-all this is a good move, as the most used programs are put front and center and the more specialist and less-used are in the easily navigable menus.

New Software

GuyManager is a welcome addition to Deft 8.

GuyManager is a welcome addition to Deft 8.

Deft 8.0b brings a lot of new software to the distro by default and the latest versions of most of it. This version is 64-bit only, and able to work in up to 256TB of RAM. Previous versions could only “see” 4GB because of the 32-bit limitation.

Again, their post on the update gives a broader view of the changes, but there are a few that I wanted to note in summary:

  • Cyclone is now at 0.2 and appears to be mostly the same as before. I’m assuming the changes are back-end.
  • Sleuthkit 4.0 stable is now included, but the Deft devs say that 4.1 will be on the official 8.0 release. [Website]
  • Guymanager 0.7.1, mentioned before, is a very nice forensics tool/disk mounting utility. [Website]
  • Tor is now available pre-installed with browser. I’ve not much use for this, but it is an increasingly-popular internet-access method. [Website]

Skype Xtractor is also new and is probably my favorite addition to Deft 8. While I’m not a criminal investigator, and I’m generally only using the distro for file-recovery, its future utility could be invaluable. Skype Xtractor is a command-line program that extracts the tables from Skype’s main.db and chatsync files and outputs them to html. So far, you can only get it on Deft 8, but it’s so useful I can’t imagine that it won’t show up elsewhere.

New Everything Else

SciTE is a new-ish text editor to Deft 8 and is the sole resident of the new Programming menu.

SciTE is a recently added text editor and is the sole resident of the new Programming menu.

Almost every other piece of software has gotten an update since Deft 7 and some have been given GUI front-ends, which is nice for beginners or those not terribly familiar with Linux command-line. The focus on 64-bit architectures with this version will mean that it probably won’t supplant my use of Deft 7 completely; there are quite a few machines in use out there that are single-core systems.

If you’re familiar with Deft 7, then I’d recommend getting 8 and using it on your 64-bit machines when able, since everything that was in the previous version is in this one (even though it’s beta) and better. Switch back to 7 only if you have to do so. However, if you’re new to computer forensics then I’d recommend sticking to 7 or waiting for the official Deft 8 release which should be very soon.

-CJ Julius