Finally some good news for Xbox 360 hackers. A fellow by the name of Robinsond has managed to successfully boot a flashed eFuse Xbox 360 with kernel 1888 using the time attack method. An astonishing breakthrough, no doubt. Once this hack is further developed and later optimized, any average Joe should be able to utilize it and take advantage of running unsigned code. Homebrew on the 360, oh yes!
Done it! My bricked box - one blown eFuse but no CPU key and no valid flash dump that would boot (I did have a valid 2241 dump though that would no longer boot because of the eFuse) - is now alive and well and booting 2.0.1888 with a patched CB (LD count = 1) and a “guessed” hash. Even doing it “manually” only took 3 evenings
Now, sleep
Just to be clear, the timing attack will allow you to downgrade to 2.0.1888. You can then upgrade to 4532 & run the KK sploit and obtain your CPU keys. You should be able to replace the original CB after the upgrade (this needs to be confirmed) and then the only “clue” to what happened is that you may have 1 or 2 more burned eFuses for the HV/Kernel version you are running.
It should be possible, soon, for anyone with an Infectus modchip and 20 Euros worth of homebrew hardware to downgrade. Dont forget the Kiosk disk is usable again too!
- source: xboxhacker
