Monday, 7 December 2009

Binatone X350 UK&ROI 2nd edition GPS

This device can be purchased very cheaply now from places like Asda and ebuyer. It runs Astrob Turbodog4 satellite navigation software within a Microsoft WinCE.NET 5.0 Core Version OS. Although I have not examined one I believe a number of Navigo devices run similar software. It has an SD card slot which was unpopulated in the one I looked at. The internal memory can be accessed like many similar devices via Mobile Device Centre in Vista which makes available a volume entitled ResidentFlash. I disable writing to USB devices by modifying the registry (there are many utilities about to do this). Simply paste the text below into a text file, give it a .reg file extension and then execute it and then reboot.


After copying and creating a logical evidence file of ResidentFlash I found three notable files within the MobileNavigator folder:

  • RecentDest.dat
  • SystemSet.dat

RecentDest.dat stores up to fifty of the recently navigated to locations. These locations are stored in records of 104 bytes in length. The first record starts at the first byte of RecentDest.dat, so by viewing the file in Encase with the view pane set to hex and dragging the view to show 104 bytes per line (assuming you have twin monitors), it is possible to see all the relevant data. Each location record stores Longitude and Latitude as 8 byte doubles which unfortunately Encase does not natively decode. The data interpreter in Winhex can do this. The hex editor 0xED on a mac can also do this but rounds up to fewer decimal places than Winhex. So given a fully populated RecentDest.dat file you have one hundred doubles to decode. I turned to my friend Oliver Smith over at Cy4or who wrote me an enscript which parses out the records to a csv file. Email me with a brief note about who you are for a copy

Recent Destinations also log the time entered, so very unusually some meaningful time and date information may be extracted. Providing these times have been recorded whilst the device can see satellites they are accurate and stored at the configured time zone. If a destination is entered when the unit can not see the sky and if the battery had been previously discharged it appears that the recorded time and date would be soon after 00:00 hours 1st January 2007.

I have decoded each 104 byte record as shown in figure 1

Figure 1 (click on image for larger version)

FAV.DAT contains user configured Favourites stored in 536 byte records. Once again the Longitude/Latitude are stored as eight byte doubles in the first sixteen bytes of each record.

SystemSet.dat appears to store the users Home location and again the Longitude/Latitude are stored as eight byte doubles.

Within the MobileNavigator folder there is a folder entitled Trace. This was empty in the one I looked out however the manual states:

The unit is capable of logging all positioning information received from the GPS satellites during navigation. It then uses this information to draw a track of the route on the map. This enables you to review the route information at a later time.

I imagine that should this feature be enabled a file of some sort will be stored in this folder.


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