Difference between pages "PDAs" and "JTAG Samsung Galaxy S3 (SGH-I747M)"

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[[Image:Zaurus-front.jpg|thumb|Sharp Zaurus]]
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== JTAG Samsung Galaxy S3 (SGH-I747M) ==
  
'''Personal Digital Assistants''' ('''PDAs''') are handheld devices with features such as calendar, notes, and so on.
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The Samsung Galaxy S3 is an Android based smartphone.  At the time of this writing (2014JAN22), I am unaware of any method other than JTAG to acquire a physical image of the NAND on this device.
  
== History ==
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For the purpose of this document, a Samsung Galaxy S3 was disassembled, read via JTAG, and reassembled.
  
The first PDA was introduced by [[Apple|Apple Inc.]] with the release of the [[Newton]] in 1993. The CEO at Apple at the time, John Sculley, coined the device a "Personal Digital Assistent" at the Consumer Electronics Show in Las Vegas. He claimed that PDAs would become "ubiquitous tools that would hold telephone numbers, keep your calendar, store notes, plus send and receive data wirelessly". While the Newton could not do all that he predicted at the time, his claim would ultimately become a reality many years later.
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=== Getting Started ===
  
While the Apple Newton went practically unnoticed in the consumer market, the introduction of the [[Palm Pilot]] by [[Palm|Palm, Inc.]] in 1996 started the popularity of the PDA. The device was a highly effective method of information management because one could store calendars, to-do lists, notes, and address book all in one simple handheld.
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What you need to dump the NAND:
  
With the advent of faster processors and better displays, PDAs gained more features, such as improved handwriting recognition, music and video playback, and [[Bluetooth]] and [[WiFi]] capabilities. [[Palm OS]]'s stronghold in the PDA operating system arena was challenged by the release of alternative PDA OSs such as [[Symbian]], [[Windows CE]], [[Microsoft Windows Mobile]], and [[Linux]]. New devices, such as [[Research in Motion]]'s [[BlackBerry]], redefined the way that individuals stayed in touch with one another. The proliferation of [[Cellphones|cell phones]] into the majority of households around the world has also created the [[Smartphone]], which integrates the traditional functionality of phones and PDAs into one device.
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# A RIFF Box [[http://www.riffbox.org/|RIFF Box]]
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# Soldering skills and small tip soldering iron (a JTAG jig may be available).
 +
# A DC Power supply capable of supplying 3.8V/2.1A output.  The power supply used for this was an [[http://www.home.agilent.com/agilent/product.jspx?pn=u8002a&cc=CA&lc=eng|Agilent U8002A DC Power Supply]].
  
== Current Popular PDA Operating Systems ==
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=== NAND Dump Procedure ===
  
* [[RIM BlackBerry]]
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# Disassemble the phone down to the PCB.
* [[Linux]]
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# Connect the RIFF Box to the PC via USB.
* [[Palm]]
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# Connect the RIFF Box to the PCB via the JTAG pins.
* [[Symbian]]
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# Connect the PCB to the DC power supply.
* [[Microsoft PocketPC]]
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# Start the "RIFF Box JTAG Manager" software.
* [[Microsoft Windows Mobile]]
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# Enable the power on the DC power supply.
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# Power the phone via the power button.
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# Dump the NAND via the RIFF Box software.
  
== PDA Forensics ==
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Instructions for disassembly can be found on Internet but it can be summarized as follows:
  
===Links===
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* Remove the rear cover and battery.
 +
* Remove the 10 x Phillips screws.
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* Remove the rear plate using a case opening tool (guitar pick).
 +
 
 +
{| border="1" cellpadding="2"
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|-
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| [[File:1-samsung-s3-sgh-i747m-front.jpg | 600px]]
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| [[File:2-samsung-s3-sgh-i747m-back.jpg | 600px]]
 +
|-
 +
| [[File:3-samsung-s3-sgh-i747m-disassembly-screws.jpg | 600px]]
 +
| [[File:4-samsung-s3-sgh-i747m-disassembly-bezel.jpg | 600px]]
 +
|-
 +
|}
 +
 
 +
* Once the phone has been disassembled, you can see the JTAG connection port located closed to the edge of the PCB near the ribbon cable.
 +
 
 +
{| border="1" cellpadding="2"
 +
|-
 +
| [[File:5-samsung-s3-sgh-i747m-disassembly-final.jpg | 1000px]]
 +
|-
 +
|}
 +
 
 +
* The JTAG pinouts are as follows.
 +
 
 +
{| border="1" cellpadding="2"
 +
|-
 +
| [[File:6-samsung-s3-sgh-i747m-jtag-header.jpg | 1000px]]
 +
|-
 +
|}
 +
 
 +
* Solder the JTAG connector to the JTAG port as follows. I used 0.040 gauge magnet wire, connected to breadboard pins, which were inserted into the 20 pin ribbon cable supplied with the RIFF box.
 +
 
 +
{| border="1" cellpadding="2"
 +
|-
 +
| [[File:7-samsung-s3-sgh-i747m-jtag-solder.jpg | 500px]]
 +
|-
 +
|}
 +
 
 +
* Connect the PCB battery terminal connections to the DC power supply.  The positive (+) connection is the outermost pin (1) and the negative (-) pin is pin (3).  You can configure your power supply to match the battery specifications which in this case is 3.8V and 2.1A but do not apply power at this time.
 +
 
 +
{| border="1" cellpadding="2"
 +
|-
 +
| [[File:8-samsung-s3-sgh-i747m-jtag-power.jpg | 1000px]]
 +
|-
 +
|}
 +
 
 +
* Now we can start the RIFF JTAG software, configure it, and connect the phone to the RIFF box.  See the picture below for more detail.
 +
 
 +
'''NOTE:''' In the picture, the "JTAG TCK Speed" has been changed from "Sample at MAX" to "Sample at 9MHz".  This was done in attempt to eliminate disconnects between the RIFF Box and the phone mid-read.  Leave this setting at "Sample at MAX" unless you experience this problem.
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 +
{| border="1" cellpadding="2"
 +
|-
 +
| [[File:9-samsung-s3-sgh-i747m-jtag-manager.jpg | 1000px]]
 +
|-
 +
|}
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 +
Apply power to the DC power supply and turn the phone on using the button on the side of the PCB.  After powering the phone on, select "READ" under the "DCC Read/Write" tab.  If all goes well the "READ" button will become the "STOP" button and the phone will begin reading...if not the RIFF software provides troubleshooting steps that should be taken to assist in diagnosing some of the issues you may experience.
 +
 
 +
'''NOTE:''' In the event of read errors the RIFF software keeps track of where the failure occurred and gives you option to restart the read where it left off.  If this occurs, you can adjust the "JTAG TCK Speed" and lower it to 9MHz (or lower) which can stabilize the read.
 +
 
 +
* Once the acquisition is complete the resulting image can be saved and forensic analysis can take place using the tool of your choosing.
 +
 
 +
== References ==
 +
 
 +
* http://android-forensics.com/android-forensics-study-of-password-and-pattern-lock-protection/143
 +
* http://forensics.spreitzenbarth.de/2012/02/
 +
* http://www.ccl-forensics.com/Software/other-software-a-scripts.html

Latest revision as of 17:50, 23 January 2014

JTAG Samsung Galaxy S3 (SGH-I747M)

The Samsung Galaxy S3 is an Android based smartphone. At the time of this writing (2014JAN22), I am unaware of any method other than JTAG to acquire a physical image of the NAND on this device.

For the purpose of this document, a Samsung Galaxy S3 was disassembled, read via JTAG, and reassembled.

Getting Started

What you need to dump the NAND:

  1. A RIFF Box [Box]
  2. Soldering skills and small tip soldering iron (a JTAG jig may be available).
  3. A DC Power supply capable of supplying 3.8V/2.1A output. The power supply used for this was an [U8002A DC Power Supply].

NAND Dump Procedure

  1. Disassemble the phone down to the PCB.
  2. Connect the RIFF Box to the PC via USB.
  3. Connect the RIFF Box to the PCB via the JTAG pins.
  4. Connect the PCB to the DC power supply.
  5. Start the "RIFF Box JTAG Manager" software.
  6. Enable the power on the DC power supply.
  7. Power the phone via the power button.
  8. Dump the NAND via the RIFF Box software.

Instructions for disassembly can be found on Internet but it can be summarized as follows:

  • Remove the rear cover and battery.
  • Remove the 10 x Phillips screws.
  • Remove the rear plate using a case opening tool (guitar pick).
1-samsung-s3-sgh-i747m-front.jpg 2-samsung-s3-sgh-i747m-back.jpg
3-samsung-s3-sgh-i747m-disassembly-screws.jpg 4-samsung-s3-sgh-i747m-disassembly-bezel.jpg
  • Once the phone has been disassembled, you can see the JTAG connection port located closed to the edge of the PCB near the ribbon cable.
5-samsung-s3-sgh-i747m-disassembly-final.jpg
  • The JTAG pinouts are as follows.
6-samsung-s3-sgh-i747m-jtag-header.jpg
  • Solder the JTAG connector to the JTAG port as follows. I used 0.040 gauge magnet wire, connected to breadboard pins, which were inserted into the 20 pin ribbon cable supplied with the RIFF box.
7-samsung-s3-sgh-i747m-jtag-solder.jpg
  • Connect the PCB battery terminal connections to the DC power supply. The positive (+) connection is the outermost pin (1) and the negative (-) pin is pin (3). You can configure your power supply to match the battery specifications which in this case is 3.8V and 2.1A but do not apply power at this time.
8-samsung-s3-sgh-i747m-jtag-power.jpg
  • Now we can start the RIFF JTAG software, configure it, and connect the phone to the RIFF box. See the picture below for more detail.

NOTE: In the picture, the "JTAG TCK Speed" has been changed from "Sample at MAX" to "Sample at 9MHz". This was done in attempt to eliminate disconnects between the RIFF Box and the phone mid-read. Leave this setting at "Sample at MAX" unless you experience this problem.

9-samsung-s3-sgh-i747m-jtag-manager.jpg

Apply power to the DC power supply and turn the phone on using the button on the side of the PCB. After powering the phone on, select "READ" under the "DCC Read/Write" tab. If all goes well the "READ" button will become the "STOP" button and the phone will begin reading...if not the RIFF software provides troubleshooting steps that should be taken to assist in diagnosing some of the issues you may experience.

NOTE: In the event of read errors the RIFF software keeps track of where the failure occurred and gives you option to restart the read where it left off. If this occurs, you can adjust the "JTAG TCK Speed" and lower it to 9MHz (or lower) which can stabilize the read.

  • Once the acquisition is complete the resulting image can be saved and forensic analysis can take place using the tool of your choosing.

References