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Professional tested “direct eMMC” pinouts

April 24th, 2017

Direct eMMC is a technique for securing a physical extraction of a wide variety of mobile devices including Android and Windows handsets and tablets, satnavs and even some Chromebooks. The technique involves connecting to specific points on the circuit board of the phone which are typically documented on a pinout diagram. Locating a reliable pinout diagram for the device is key to success and efficiency with the technique which is why Control-F launched in collaboration with FoneFunShop. currently hosts clear and (most importantly) tested pinout diagrams for over 80 devices and it is regularly updated as we trace new devices. We’re always keen to hear about devices that you would like to see pinouts for.

Annual subscriptions offering unlimited access to the site are only 280GBP + VAT but browse the site today for free to see which devices are represented.

Get in touch if you’d like to find out how direct eMMC could help your department or how to get access to

Samsung Galaxy S6 chip-off

April 24th, 2017

Samsung introduced UFS flash memory with the Samsung Galaxy S6 on account of it’s faster read/write speeds compared with eMMC chips. Samsung uses UFS in the S7 and will in the S8, and the technology is being adopted in flagship devices from other manufacturers. Performing chip-off on UFS flash memory is possible but requires specific equipment and variations on standard techniques.

Our 4½ Flash Memory Chip Removal training course teaches students how to safely remove and recover evidence from eMMC, UFS and proprietary flash memory chip formats. The techniques are ideally suited to locked, damaged or unsupported devices where no other practical option exists for extracting data. Students will get hands-on experience of performing chip-off on a Samsung Galaxy S6.

Here’s what delegates on our March 2017 course had to say:

  • “Probably the most I’ve learnt on any course I’ve been on.  Good group and good trainers and good learning material”
  • “Very professional and enthusiastic trainers who are a credit to the company.  I would have no hesitation in recommending this course or any other Control-F courses”

Get in touch to check availability on our next course.

Understanding Write Ahead Logging in SQLite

April 24th, 2017

Write Ahead Logging (WAL) is a mechanism used by SQLite databases to manage pending changes to their contents; such pending changes are stored initially in files with the suffix -wal. WAL files represent a potential source of key evidence as they can contain app data (e.g. messages, browser history etc.) which is not live within the main database file and therefore may be missed by some forensic software tools. Understanding WAL files and how to recover evidence from them is a key part of investigating pre-installed and 3rd party apps.

In our 4½ day Smartphone App Forensics course we teach delegates techniques for preserving the contents of WAL files and ensuring that those contents can be viewed, interpreted and presented in evidence. Get in touch to check availability on our next course.

Chip-off – isn’t that just for BlackBerrys?

September 21st, 2016

We’ve been running chip-off training since 2013 and during that time we’ve taught a lot of delegates how to recover evidence from locked BlackBerry handsets. It feels like the right time to dispel some myths about chip-off and explain how the technique is just as relevant as it’s ever been (despite BlackBerry’s demise!)



MYTH 1 – Chip-off is only useful for locked BlackBerrys (and we hardly see any these days)

It’s true that locked BlackBerrys have historically been the most common scenario when chip-off has been utilised, but the same techniques can be applied to other devices with great results. Previous course delegates are routinely using chip-off techniques to secure physical extractions of Windows Phone devices which can’t be performed in commercial tools as well as locked and unsupported Android devices where even Direct eMMC (ISP) isn’t viable.


Delegates on our Flash Memory Chip Removal course perform chip-off on Nokia Lumia and Sony Xperia devices for which chip-off is ideally suited.



MYTH 2 – Chip-off is destructive to the device

Chip-off is typically performed using hot air to de-solder the flash memory from the printed circuit board (PCB) of the device, and usually components are damaged during the process. In other words, chip-off is undertaken in such a way that the device won’t work again (but acquiring the memory contents can justify this). But it doesn’t need to be so.
Using the right techniques, it’s possible to de-solder the flash memory chip (whilst protecting the rest of the device), read the chip and then re-solder it and re-assemble the device. If the device can be used after chip-off then new opportunities arise, such as entering passwords (recovered from the extracted data) into the device. This means that the device itself can be used to unlock and decrypt stored data and a manual examination or logical extraction can be performed. The approach won’t work in every case (so the process should still be assumed to be destructive), but the ability to restore the device to a working condition is extremely powerful.


We have been busy refining such techniques; our record is de-soldering and re-soldering the same eMMC chip ten times and the handset still works! We now teach delegates how to re-solder flash memory chips after data has been extracted from them.


MYTH 3 – Chip-off is really expensive

The simple answer to this is that chip-off can be expensive, but it absolutely doesn’t need to be. Infra-red rework stations can be used to de-solder flash memory chips instead of using a hot-air approach. Although these can be effective, they are expensive and are not well suited to flash memory which has been glued to the PCB using epoxy. For these reasons we use a cheaper and more flexible approach of hot air guns and hot air pencils in our training.


The equipment needed to de-solder and extract data from the eMMC flash memory chips found in almost all current smartphones and tablets can be purchased for under £2,000(including a fume extraction system). For organisations already outsourcing devices for chip-off, these equipment costs are easy to justify.

Chip-off now includes “chip back on” !

August 30th, 2016

We have been teaching delegates how to successfully de-solder flash memory chips from mobile devices since 2013 with great success. Our Flash Memory Chip Removal now includes re-soldering chips after they have been removed and read.

Historically, chip-off has been seen as a process which is always destructive to the device in question. However, in some circumstances it is possible to replace the flash memory chip such that the device can be powered on and any PIN/password (recovered from analysis of the recovered data) entered to gain access to the device. We’ll be teaching techniques for protecting the PCB and re-soldering the flash memory in order to make chip-off an even more powerful solution for locked devices.

At the same time, we’re updating the devices we use on the course to better reflect current “problem” devices. Delegates work with locked Android and Windows Phone devices which cannot be dumped using commercial forensic tools or direct eMMC (ISP) – in other words, where chip-off is the only solution for data extraction.

Do get in touch if you would like to check availability.