Recentapps sansforensics code#
The code below shows the URLZONE enum and the corresponding values: The ZoneId property identifies the URL Security Zone and flags the download according to its respective level of trust. From our analysis, we have found the following properties: The structure of the stream can also change depending on the application which performed the download. Other applications may also implement the functionality. Zone.Identifier streams are written to downloaded files by other browsers such as Microsoft Edge, Edge Legacy, Google Chrome, Mozilla Firefox, Opera and many other Mozilla and Chromium based browsers. Internet Explorer is not the only web browser to have this functionality. This allows you to track back the original source of a downloaded/extracted file.
Recentapps sansforensics archive#
The new stream contains a ReferrerUrl property with a link back to the original archive the file was extracted from. We have also found that if the user extracts data from a downloaded archive file using the built-in Explorer functionality, Windows helpfully adds a Zone.Identifier to every extracted file. From an investigative point of view, these properties are extremely useful. Other properties have been added over time, further enhancing the value of this data. Earlier versions of the Zone.Identifier stream only contained the ZoneId property. Immediately, you can see there are some very interesting properties in this stream, such as ReferrerUrl and HostUrl. We can see a group header called along with various name/value pairs. Get-Content -path D:\Downloads\1-6b4b9.zip -stream Zone.Identifier Windows Powershell Get-Content CommandĪs you can see from the output, the data is stored as plain-text with an initialization file structure. This file was downloaded using Mozilla Firefox v88:
Recentapps sansforensics zip file#
In the following example, we use the Get-Item command to list all available streams for a specific ZIP file stored in the Downloads folder. However, we are going to take a look at using Windows PowerShell commands. There are a number of ways to access Alternate Data Streams (such as using the Sysinternals Streams tool). So how do we access these alternate streams? Accessing an Alternate Data Stream However, the NTFS file system supports multiple data streams, where the stream name identifies a new data attribute of a file. This data stream, sometimes referred to as the primary data stream, or more accurately the unnamed data stream, has no name associated with it.
It is the part of the file where the actual data is stored. One of these attributes is $DATA, or simply called the data attribute.
What is an Alternate Data Stream?Īs we know, files stored on an NTFS file system can have many different attribute types, these are the building blocks for the file. First of all, we need to take a look at Alternate Data Streams. We shall explain all and show you exactly how they can help you during an investigation. If that is the case, then you have come to the right place. If you are new to the field of digital forensics, you may not be aware of Zone Identifiers, Alternate Data Streams (ADS) or URL Zones.
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