Five ways to gather evidence faster
We at MSAB understand how vital it is for our customers to have secure and trusted results in order to produce solid evidence for the courts. It is a responsibility we take very seriously.
For years XAMN, our analytical solution, has been enabling investigators to quickly and effectively find and analyze critical evidence.
The huge volume of stored data on mobile phones makes the analysis process more time-consuming than ever. The latest version of XAMN has features which are very beneficial to investigations such as an improved interface and speed of analysis.
There are many different approaches to search and filter data depending on what type of data you are looking for. But being able to narrow your search to specific parameters can be hugely time-saving in a situation where vast amounts of data are stored on one or more mobile phones.
In this post we will show you a five XAMN features that may speed up your work – especially when investigating pictures and messages.
Find similar pictures
Chris Currier, technical trainer at MSAB, explained in an earlier blog post what dHash values are and how you can use them to find similar looking pictures.
Wouldn’t it be great if you had an application that with 100% certainty could identify the pictures taken by the device you are investigating?
This is a tricky one, but there are a few shortcuts to use in order to quickly find most of these files. Photos taken with a camera typically end up in the Digital Camera Images “DCIM” folder.
In order to identify the device which, the pictures were taken with, type “DCIM” in the text filter search bar to see all matches. You can then continue to filter on metadata such as equipment manufacturer and equipment model – either in the same tab to further filter among your search results, or in a new tab to scan within the whole case.
Do you find yourself scrolling through a sea of file icons and system files?
XAMN provides a way to quickly hide pre-installed file icons and system files that are not normally useful to investigators.
We call this the “Known data” function. This enables you to exclude or include known data, such as system files. The known data sets are based on the NIST standard reference library and MSAB’s own unique reference data set, which is downloadable from the customer portal.
Even when the system files are taken care of, there might still be many images to investigate. A good starting point is to use the “Recognized Content filter.” In order to use this filter, you would need to adjust your XRY extraction to include image recognition decoding.
This filter will give you the ability to directly see pictures containing weapons, drugs, vehicles, financial, people, and electronics.
Remember that there might be false positives and some hits might be missing since this data is categorized using machine learning techniques.
See the full conversation
A short message is more interesting when you can see it in its full context, right?
A really useful feature in XAMN is that it will keep the message you are looking at highlighted even when you switch between views. This means that if you have found an interesting chat message, you can move to the “Chat view” and directly see the message in the context of the full conversation thread. In a similar way, you can switch to the file tree view (or create a folder filter on the path) to see all files stored in the same folder.
The different view options make it easy for the user to visualize the data and make informed decisions during analysis.
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