SANS Digital Forensics and Incident Response Blog: Category - Evidence Analysis

Internet Evidence Finder Part II: Intro to IEF v3.3

I had an opportunity earlier this year to interview Jad Saliba of JadSoftware.com discussing his Internet Evidence Finder tool. You can view that interview here. Hopefully, SANS Computer Forensic Blog readers enjoyed the 15% discount that Jad offered exclusively to SANS CF blog readers and have taken the time to implement this tool into your forensic toolkit. This post is part of a series and will introduce functionality of IEF v3.3. You can download the most recent version (v3.5.1 at time of this article) from JadSoftware.com.Just a brief recap of what IEF will search for on a mounted drive/folder. Facebook chat, Yahoo! chat (IEF must have chat username to decode), Windows Live Messenger chat, Google Talk chat, AIM logs, hotmail webmail fragments, yahoo! webmail fragments, etc. For a full listing of supported artifacts and limitations visit

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Trusting Your Tools

"A trusted tool is one that you understand what it does"- Chris Pogue

I recently heard Chris make that statement during his "Sniper Forensics" presentation at the 2010 SANS Forensics & Incident Response Summit. It was that statement that inspired me to put together this post. As digital forensic examiners, we rely on various applications/programs (tools) to aid us during our investigations. I want to take Chris' statement and flesh it out a bit''

"A trusted tool is one that you understand what it does, where it came from, what flaws it has and what results it gives you."

This post is aimed at those that are new to digital forensics, but will also help those that may not have been given a push in the right direction or those that are experienced who might have lost their way. So let's get started.

There may be a tool you are interested in using that you heard about somewhere. Let's face it, forensic examiners need tools to assist them with their

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Windows MBR and Advanced Format Drives (e512)

Advanced Format Drives (e512)

Advanced format drives are now on the market in full force. These drives are also known as e512 drives. They include the new Long Data Sector standards recommended by International Disk Drive Equipment and Materials Association (IDEMA). These are also known as the 4k - or 4096 - byte sector drives. Fortunately for legacy reasons, the drives are handling the sectors with drive controllers and electronics by emulating 512 byte sectors (hence the term e512). The various OSes and applications out there are going to see sector sizes as 512 bytes. It turns out this is not a major game changer for forensic examiners - unless you're really getting into rebuilding a drive physically.

That said, there is an area of change that should be noted. Some legacy artifacts have changed with the way these drives are now formatted. Specifically, the Master Boot Record (MBR) method of partitioning a drive has changed with Windows 7. Until

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Digital Forensics Case Leads: SQLite changes may impact your processes

I don't know if it's the time of year, the heat or what, but there's been so much going on over the last couple weeks that this post almost didn't make it out. Gasp! Thanks to the efforts of Ira Victor and Mark McKinnon (yay crowd-sourcing), we pulled it off. Speaking of crowd-sourcing, this post is meant to be a weekly round-up of things we've found that may be of interest to digital forensics and incident response practitioners, as such, please drop us a line at caseleads@sans.org if you have an item that you feel should be included in the weekly post. We appreciate it.

Tools:

  • Paraben's P2 Explorer is a great little free tool that mounts a variety of popular disk image formats, allowing the investigator to easily run a variety of tools against the mounted file system (e.g. anti-virus/malware scans).
  • Digital

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Stop, Children, What's That Sound?

Making Use of a Super Timeline

I won't go over how to create a Super Timeline since Rob has already covered that as a high level in on the SANS Digital Forensics Blog. What I've been working on recently is how to best make use of the resulting timeline. I have also discovered some interesting artifacts that never occurred to me to consider as part of a timeline.

What I've learned is that creating a Super Timeline is only the beginning of timeline analysis. Because the Super Timeline method captures so many time stamps, it islikely that a SuperTimeline will contain too many entries to manually review line by line especially if an examiner creates a timeline for an entire drive image.The challenge is to be able to pin down what portions of that timeline are relevant to the examination at hand.

What I recommend

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