Showing posts with label forensics. Show all posts
Showing posts with label forensics. Show all posts

Digital Evidence and Computer Crime, Second Edition Review

Digital Evidence and Computer Crime, Second Edition
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Digital Evidence and Computer Crime, Second Edition ReviewSometimes, defense attorneys have it easy: one slip-up by the prosecution and evidence is thrown out. Knowing that, law enforcement goes to great lengths to ensure that evidence is appropriately collected and protected. That works well in the physical world, where law enforcement has many generations' worth of experience. But in the modern world of computers and digital networks, where the simple act of rebooting a computer is enough to wipe out large amounts of evidence, law enforcement clearly needs thorough guidance.
Such a resource is here: Digital Evidence and Computer Crime, an excellent book that details the elements of digital crime. Author Eoghan Casey does a superb job of applying forensic science to computers. The information presented here is critical to a diverse audience: law enforcement, attorneys, forensic scientists, and systems administrators, for instance.
While cybercrime law is in some ways similar to other aspects of criminal law, it nonetheless has its own language and categories. For instance, jurisdiction is a key element in both the physical and digital realms, but it is a much trickier concept in the latter. Casey develops this topic and many more. Those new to computers and networks need not worry: the book begins with an explanation of how they function. With the basics out of the way, Casey details how computers can be used in crime and how the evidence created from these activities can be used for later analysis....The accompanying CD-ROM contains simulated cases that integrate many of the topics covered in the text. In all, the book and CD are an excellent introduction to an increasingly important area of law enforcement.Digital Evidence and Computer Crime, Second Edition Overview

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Internet Forensics Review

Internet Forensics
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Internet Forensics ReviewNormally, I place little weight on the lowest and highest reviews for a book. In this case, I discarded the review "Far, far below O'Reilly's standards, February 7, 2006."
However, after reading the book, I realized that this was the most accurate review. Is the book for Administrators or for home users? For UNIX or Windows users? The author would have you believe that it offers something for all. I disagree.
Ultimately, it is so superficial and spread out that it is of little use to anyone. Why the author throws in a simple intro to IP Addresses and then seems to take up paragraph after paragraph on parameter options for Unix-based commands is beyond me.
This book reads like bad spam - enticing the using with yet another title with catch words that are trendier than "free Vigra" - Internet + Forensics - both a limp approach to the quest for more money - yours and mine.
Fight back - Don't waste your money on this book.
Also notice that the author tries to gain our alliance and sympathies with his similar plight of spam email. If the guy truly is a security "expert" he should be spam-free. Free advice: Try a spam blocker, an email referral service, or just good system administration.
Internet Forensics Overview

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Handbook of Digital Forensics and Investigation Review

Handbook of Digital Forensics and Investigation
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Handbook of Digital Forensics and Investigation ReviewThis book has become one of my three "go to" books when it comes to digital forensics along with Brian Carrier's File System Forensic Analysis and Harlan Carvey's Windows Forensic Analysis DVD Toolkit, Second Edition.
Don't skip Rob Lee's excellent forward to this book. Lee crafts a very concise explanation of how the digital forensics field is growing and evolving.
Eoghan Casey's introduction further expands on the theme with a very thoughtful analysis of the current state of digital forensics and how the scientific method can and should be applied to our field. In this section, Casey begins to bring out one of the primary themes of the first portion of the book which is that there are different aspects to digital forensics that can be summarized in the three main disciplines of traditional forensic analysis, electronic discovery and intrusion investigation.
The first part of the book (chapters two through four) is devoted to exploring the three disciplines by devoting a chapter to each one. These individual chapters are exemplary overviews of each of the disciplines.
Chapter two is one of the finest overviews that I've seen regarding digital forensics. Casey and Curtis Rose provide set what will be a persistent theme in the book which imparting technical information in a very approachable manner, but also in a relatively short amount of space. This chapter builds and expands on Casey's invocation of the scientific method and it's role in forensic analysis via a thorough explanation of forensic analysis that is well illustrated by a sample case scenario created by the authors to help explain their methodology.
Chapter three is a fantastic overview of e-discovery and coupled with chapter two provides an effective answer to the question of what the difference is between electronic discovery and forensic analysis. Chapter three shouldn't be dismissed as an overview, however. The authors put forth quite a bit of effort in explaining some tactical level issues such as how to properly interview an evidence custodian to determine the universe of data that might be relevant to a particular matter and how to use various tools to capture data.
Chapter four provides a detailed overview of intrusion investigations using the incident response life cycle. Similar to chapter three, this chapter not only provides an expert overview of the life cycle, but also provides the reader with tactical level advice such as the use of timeline analysis to assist a responder with an incident handling scenario. Like chapter two, the authors use investigative scenarios to illustrate their points.
The second half of the book is more tactical in nature and will have great appeal to both the experience practitioner and those who are merely curious about digital forensics. As in the first half of this book, the authors and their editor Casey, take great pains to make sometimes very technical information approachable to all audiences.

Chapter five is the section on Windows forensic analysis. Authors Ryan Pittman and David Shaver provide probably the most concise, yet effective overview of Windows forensic analysis that I've read recently especially given the fact that they have just a chapter in which to do their work. At the time the chapter was written, the authors had access to early versions of Windows 7 so the chapter spends a certain amount of time comparing and contrasting the differences between Windows XP compared to Vista\Windows 7. The authors also provide a very effective overview of traditional forensic artifacts such as $MFT artifacts and registry artifacts. While this chapter doesn't serve as a replacement for the Carrier and Carvey books, it's an examplary primer for those just starting in Windows forensic analysis and an excellent "cheat sheet" for more experienced practitioners. This is not to say that the authors are merely rehashing existing data. Far from it. Even an experienced examiner is likely to learn new information by reading their work. They, for example, put a lot of effort into explaining data destruction, file deletion and defragmentation. It's amazing how much content they managed to include in this chapter.
Chapter six continues on the theme of packing a lot of information into a short amount of space, but doing so in an approachable manner. This chapter on UNIX Forensic Analysis includes at it's beginning a very helpful explanation of the Unix and Linux worlds. Like chapter five the authors provide valuable information on the inner workings of file system forensic analysis as well as well as more application level artifacts such as Firefox browser analysis and chat analysis. A nice bonus is that this chapter also covers removable media analysis. Most work that I have seen in this area has been relative to Windows operating systems so it was good to see this content for a non-Windows operating system. The authors also spend quite a few pages on the examination of email artifacts which is also a welcome addition.
Anthony Kokocinski's Macintosh Forensic Analysis makes up Chapter seven. Given that this is a weakness in my individual skill set, I learned an incredible amount from this chapter. Kokocinski continues the overall theme of the book in that he presents his knowledge on the subject in a very approachable manner. Kokocinski also includes a detailed section on popular Mac applications such as Safari, iCal, Mail, etc.
Chapter eight is Ronald van der Knijff's amazing chapter on embedded system analysis. In a book this good, it's hard to pick a chapter that can be considered a highlight, but this chapter would be a top contender. It covers a wide area of devices from traditional technological tools such as cellphones and GPS systems to devices such as parking meters and pacemakers. The chapter provides a solid overview of the various technologies that comprise this wide range of devices, but also delves into tactical matters such as how to preserve and even repair damaged devices that might contain useful data.
Chapter nine is the excellent and extensive network investigation chapter. Like the previous chapters, this is a more tactical treatment of a subject that is introduce earlier in the book and is an excellent overview how to practically apply the themes introduced in chapter four. The chapter includes an overview of TCP/IP networking down that includes an explanation of the structure of an Ethernet frame and TCP/IP packet headers. The authors make extensive use of the Wireshark tool which makes it easy for a student of network investigations to emulate the work being done as part of their overall learning experience. The later portions of the chapter delve into the work of investigating networking technologies such as Cisco routers. The Cisco section includes an overview of how to use Cisco IOS to help facilitate a network investigation.
Chapter ten is an amazing chapter on mobile network investigations put together by Dario Forte and Andrea de Donno. As it's title suggestion, this isn't a chapter on the examination of digital communication devices such as cell phones, but how to understand and investigate the network environments in which they operate. The authors deal with such issues as determining the location of particular devices, what networking data might be available and the interception of data. As one would expect with a chapter such as this, the authors also cover legal issues with an emphasis on relevant EU legislation.
Full Disclosure: While I haven't had the privilege of meeting most of the authors of this excellent book, I'm honored to have connections with some of the authors including, but not limited to, being on a board with Rob Lee and Eoghan Casey.Handbook of Digital Forensics and Investigation Overview

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Windows Forensic Analysis DVD Toolkit, Second Edition Review

Windows Forensic Analysis DVD Toolkit, Second Edition
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Windows Forensic Analysis DVD Toolkit, Second Edition ReviewThe second edition of Harlan's book nicely complements the first and is essential reading for practitioners at all levels. For those of us who primarily engage in exams of acquired images, the chapters on Registry Analysis, File Analysis, Executable Analysis, and Rootkit Detection provide and build upon basic concepts that go beyond what is taught in beginning and intermediate computer forensics courses.
The registry analysis chapter is particularly valuable and one that I draw on repeatedly. The accompanying DVD, with its scripts, not only provides tools to gather the data that Harlan describes, but provides a means to learn while you read by taking a hands on approach to registry analysis.
The chapter on file analysis teaches fundamentals of system files and logs that can provide key evidence in an exam. It explains not only what may be found, but how to get it and why it got there. These are the types of issues that can aid immeasurably when it comes to report writing and courtroom testimony. Similarly, the discussions on malware, rootkits, and executables provide guidance and solutions to considerations of whether an uninvited influence played a role in data arriving on, or departing from, a system.
For those who don't engage in incident or live response at the moment, the time is fast approaching when that aspect forensics is going to be vital to us all. Harlan explains what information is available, and he describes the methods and tools with which we can acquire volatile data and access information that's gone once the plug is pulled. Harlan brings together this area of his book with a discussion of analyzing the data.
In sum, this is a great work that is suited to those who have had basic computer forensics training as well as examiners who have been practicing for a long time. Things change every day, and WFA II provides a means to keep pace.
Windows Forensic Analysis DVD Toolkit, Second Edition Overview

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