robinsod has released a decryption and extraction tool for the different parts of your Xbox 360's flash. Called the 360 Flash Dump Tool v0.1, this app will basically open up the data in your 360 for you to study, if you so choose.
To keep us from getting past the technical aspects of this application, here's what robinsod had to say about it:
This tool will allow you to decrypt and extract various parts of a XBox360 flash dump. The flash is devided into 2 major parts:
1. The Cx sections (CB,CD,CE & 0,1 or 2 CF & CG sections).
CB, CPU bootup
CD, unpacker for CE
CE, contains the HV and Kernel in a .cab archive
CF&CG are upgrade patches
The tool will extract and decrypt sections CB, CD, CE. Additionally it will extract the .cab file in section CE. This can be opened with winrar and the content (xboxkrnl.img) extracted. The first 256K of xboxkrnl.img is the Hypervisor, the remainder is the 2.0.1888 Kernel.
2. The Flash File System.
The tool expects a dump to contain the data (512 bytes) followed by the ECC (16 bytes). The ECC bytes are used to locate FS entries & identify the version.
The tool consists of the exe and CxKey.txt. CxKey.txt is delivered with 32 '0's and they should be replaced with the key obtained from the 1BL. After all the fuss about AACS keys recently it seems risky to put the key in the exe. The Cx sections extracted from a dump will only decrypt correctly if the correct hex digits are inserted in the CxKey.txt file.
As you can see, it's not exactly a very newbie-friendly device. It does uncover a lot of things about the Xbox 360's code. For those who know what to do with it, it's a very useful thing. As Jamie M., one of our other bloggers, mentioned about the device, "it's a step towards understanding how the xbox 360 flash works (kernel / file system) allowing for possible future customizations as seen with the PSP custom firmware." Isn't that a nice deal?
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