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

Least frequently occurring strings?

My phone rang. It was a small business owner looking for some help. He had a system he wanted me to take a look at, but was light on specifics. I asked to speak to his IT person. He laughed and said he was the IT person and that he knew next to nothing about … Continue reading Least frequently occurring strings?


Understanding EXT4 (Part 4): Demolition Derby

Hal Pomeranz, Deer Run Associates In Part 3 of this series we looked at the EXT4 extent tree structure for dealing with very large or very fragmented files- basically any situation where you need more than the four extent structures available in the inode. Go back and read that part now if you haven't already, … Continue reading Understanding EXT4 (Part 4): Demolition Derby


Understanding EXT4 (Part 3): Extent Trees

Hal Pomeranz, Deer Run Associates There's one more big concept we need to cover before you can really start decoding EXT4 file systems. As I mentioned in Part 1 of this series, you can only have a maximum of 4 extent structures per inode. Furthermore, there are only 16 bits in each extent structure for … Continue reading Understanding EXT4 (Part 3): Extent Trees


Understanding EXT4 (Part 2): Timestamps

Hal Pomeranz, Deer Run Associates Well I certainly didn't plan on three months elapsing between my last post on EXT4 and this follow-up, but time marches on. That was supposed to be a clever segue into the topic for this installment- the new timestamp format in the EXT4 inode. OK, I know what you all … Continue reading Understanding EXT4 (Part 2): Timestamps


Digital Forensics Case Leads: Pwn2Own 2011 underway

Last week I was in Boston teaching SANS FOR 408: Computer Forensic Essentials, now renamed to Windows Forensics In-Depth. Thank you to all those in my class, it was fun. Huge thanks to my facilitator, Mike. I mention the course here, because I had a mix of students from experienced veterans to those brand new … Continue reading Digital Forensics Case Leads: Pwn2Own 2011 underway