Triaging a computer can be a methodology to avoid many issues inherent with “pulling the plug.”...
Digital forensic science is not a matter of recovering a file that proves somebody’s guilt; it...
There is clearly a difference in the type of investigations and examinations being performed versus what are encountered in the public sector. The private sector examiner can be expected to provide evidence to private attorneys, corporations, private investigators, and corporate security departments.
Let’s be very clear before we go down the flasher box path, there is no replacement or substitute for the automated forensic tools produced by mobile forensic manufacturers. Unfortunately, with growing consumer demand for newer and more technologically advanced mobile phones, these automated and safe solutions do not meet some investigative requirements.
Solid-state drives represent a new storage technology. They operate much faster compared to traditional hard drives. SSD drives employ a completely different way of storing information internally, which makes it much easier to destroy information and much more difficult to recover it.
Network investigations can be far more difficult than a typical computer examination, even for an experienced digital forensics examiner, because there are many more events to assemble in order to understand the case and the tools do not do as much work for the examiner as traditional computer forensics tools.
The premise that an effective digital forensic examiner must be able to validate all of the tools that he or she uses is universally accepted in the digital forensic community. I have seen some less-educated members of the community champion a particularly insidious, and I will argue, invalid method of tool validation, often referred to as the two-tool validation method.
The Bring Your Own Device (BYOD) phenomenon is affecting forensic data acquisition because it creates crossover between data that is controlled by an individual versus by a company. People are using their personal devices for work-related tasks because it can seem easier than trying to use typical work resources.
What happens when a smartphone is locked and unsupported by forensic tools? Flasher box, JTAG, or chip-off extraction methods become necessary. All three enable physical extraction — a logical examination cannot be performed on an unsupported locked device. However, even this capability can be limited.
Boot loaders are currently considered the most forensically sound physical extraction method. While they do involve loading a piece of code onto the device, this happens before the forensic tool accesses any evidentiary data.
For the digital crimes of today, specialists need to examine a much more complex environment. Investigators need to image digital media of a multitude of types: magnetic, solid-state, or optical, for example.
Apps, not just available for iPhone or Android but also through device vendors like Samsung, Nokia, and LG — as well as from mobile carriers like T-Mobile and retailers like Amazon — are a digital forensics challenge.
Prepaid phones have been a problem for some time, and continue to be a problem for law enforcement in particular.
The term metadata is sometimes defined with the abstract expression: “data about data.” When any data is defined, described, or created, it can always be characterized in terms of similarities, structure, or related data.
There are multiple techniques for comparing the code of two binaries, where none or only partial source code is present. A trivial way is to use a binary diffing utility. This utility is used in a similar way as plaintext code comparison listing.
Each social media platform is different, with unique code and variations. Each one runs on its own hardware and software platform, and some, such as Facebook, have even developed custom technology to run their sites. Because of that, each requires its own method of forensically collecting data.
Vendors and operating systems can vary widely, particularly with Android, but also even within iOS and BlackBerry user groups. More than 40 iOS versions are commercially available, and are spread among six different iPhones, five iPads, and five iPod Touch devices.
Once a password has been bypassed, an investigator has full access to the computer, allowing them to gather any evidence necessary, including the contents of the DRAM in the system. You can then use a PCI Express or ExpressCard device for memory acquisition.
In today’s world of social media, investigators are taking on a new role; they are becoming a form of eyewitness. As the eyewitness, an investigator observes evidence that might not be visible to any other available investigator. The investigator is wise to create a record of what he or she sees at any particular point in time, including print outs of screenshots.
Not only does data storage vary from device to device and OS to OS, but devices may also be passcode-protected and/or encrypted. iPhone passcodes fall into two categories: simple and complex. A mobile data extraction tool should be able to reveal a simple passcode automatically for most devices.
A question often asked is, “What education and training is necessary to work in digital forensics?” There is not one easy, simple answer to this question. First of all, an individual has to make a choice of career pathways, namely do they wish to work in the public sector or in the private sector.
Source code and text comparison is an established, well-known analysis technique. Using a program capable of simply listing file A in the left window and file B in the right window and highlighting the differences between each and every line, preferably in a different color, is frequently an easy way to detect copied text. Some of the more advanced analysis utilities can also compare, merge, and synchronize files and directories.
It is very important that the digital evidence be preserved from the time of seizure until it is presented as evidence in court. If evidence is suspected of being tampered with, it could be ruled as inadmissible in court. Therefore, it is important for CCEs to preserve digital evidence by using a Faraday bag and noting its usage on the chain of evidence form.
Prepaid phones have been a problem for some time, and continue to be a problem for law enforcement in particular. That’s because the disabled data port on these devices cannot be enabled, and vendors don’t make the devices’ APIs available to commercial forensic extraction tools’ developers.
These days a great deal more is required of an attorney before the motion for injunctive relief can be filed. You can help them meet their professional obligations by providing advice on the preliminary steps that need to be addressed to preserve electronically stored information. The attorney must first establish a litigation hold of all potentially relevant electronically stored information.
To attain ASCLD/LAB – International accreditation, a laboratory must achieve 100% compliance with every applicable clause in the accreditation requirements. Often overlooked is the fact that just about every sentence or lists of items in the accreditation requirements are ratable clauses to which the laboratory must demonstrate conformance.
Good case management workflow for website capture should include researching the suspect company background and website, identifing necessary resources required for the project, initiating and executing the project, and reporting and testimony.
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