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XboxHacker BBS > Xbox 360 > XboxHacking - General (Moderators: SiliconIce, Arakon, Redline99) > hdd
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Author Topic: hdd  (Read 3083 times)
ViRAM
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hdd
« on: April 15, 2006, 04:08:11 PM »
Is it possible to somehow to alter the data signals going in and out of the xbox hdd, while the unit is running ?
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MacDennis
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« Reply #1 on: April 15, 2006, 04:30:18 PM »
Quote from: ViRAM on April 15, 2006, 04:08:11 PM
Is it possible to somehow to alter the data signals going in and out of the xbox hdd, while the unit is running ?
Yeah, why not? Smiley
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ViRAM
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« Reply #2 on: April 15, 2006, 06:22:57 PM »
so 2 computers could "share" a hdd ?
im just thinking how the xbox scans the xex before execution
what if one of those computers had the right tools on it to read/write to the hdd "on the fly"
now if the xbox would run the dashboard xex, can the file be replaced after the checks are done ??

or am i too high Huh
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MacDennis
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« Reply #3 on: April 15, 2006, 07:47:08 PM »
Quote from: ViRAM on April 15, 2006, 06:22:57 PM
so 2 computers could "share" a hdd ?
im just thinking how the xbox scans the xex before execution
what if one of those computers had the right tools on it to read/write to the hdd "on the fly"
now if the xbox would run the dashboard xex, can the file be replaced after the checks are done ??

or am i too high Huh
Yes you are. The dashboard isn't on the HDD.  Wink
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ViRAM
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« Reply #4 on: April 16, 2006, 04:05:05 AM »
Shurely there is plenty of other executables on the drive ?
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MacDennis
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« Reply #5 on: April 16, 2006, 04:41:05 AM »
Quote from: ViRAM on April 16, 2006, 04:05:05 AM
Shurely there is plenty of other executables on the drive ?
If you change an executable you will break it's signature. Result: it will be rejected by the kernel.
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BlueCop
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« Reply #6 on: April 16, 2006, 08:29:13 AM »
i am not sure about this but i beleive that the xex would be read into memory and then it signature verified and run directly from ram. i think your thinking is that it would read it once to verify it signature and then read it again for execution. i dont' think this is the way it happens. so you would have to have something to patch ram which still wouldn't work because of hyervisor, ram checksums or encrypted ram. i have heard all these tossed around. i don't think anyone knows the full technical details about these implementations but people all seems to know the ram is protected.
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uberfry
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« Reply #7 on: April 16, 2006, 09:46:48 AM »
Quote from: BlueCop on April 16, 2006, 08:29:13 AM
people all seems to know the ram is protected.

u can't protect ram...
it's just that even if we did access the ram, the data in it would be hashed...
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BlueCop
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« Reply #8 on: April 16, 2006, 10:01:33 AM »
Quote from: uberfry on April 16, 2006, 09:46:48 AM
u can't protect ram...
it's just that even if we did access the ram, the data in it would be hashed...

that is what i mean by protected. not a viable attack vector
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