HP G62-220CA UEFI Shell Mod

[Crahzee]

Hi Everyone!

First time poster, long time lurker. I recently stumbled up a post by Donovan6000 that gave me the urge to pull the trigger and flash a modded BIOS. I've tinkered with my BIOS files before but never actually flashed it til now. Here is my README from the zip along with a picture of the shell on my laptop. With this complete and knowing my laptop is one of the few that is RSA signed without the check I'll be experimenting with unlocking menus or whitelists, etc. I haven't found much info on the G62 but hopefully this will bring those users out of hiding!

Enjoy!

Code:

UEFI support for HP G62-220CA (Possibly others..)

-INFO-
System: HP G62-220CA
Tools Used: UEFI Tool, Universal IFR Extractor, EFI Variable Dumper, A Hex Editor
Original File: SP52598.exe
BIOS Version: F29
Supported Boards: 1444; 1445; 1446

-MODS-

Patched SHA1 verification of CryptRSA.efi with SHA1 of Shell.efi

-BACKGROUND-

After reading his post (http://donovan6000.blogspot.com/2013/08/look-what-i-did.html) on booting the UEFI
Shell via HP's harcoded UEFI implementation, I decided to see what my system was capable of. Using tools from
Donovan6000 I noticed my BIOS has hidden menus along with a setting for UEFI Boot (Pre-enabled of course!).
For my first attempt I decided to keep it simple and just patch the SHA1 verification. With UEFITool I did a
quick search for the SHA1 of the original CryptRSA.efi in my decrypted BIOS and switched it out for the SHA1
of the Shell.efi. Then I patched my InsydeFlash so I can flash my decrypted BIOS, and well in less than 24hrs
I have minimal UEFI support.

-INCLUDED-

Modded 01444F29.bin
Patched InysdeFlash
Shell.efi renamed in correct folder structure

-NOTE-

I, Crahzee, do not take any resposibility or liability for what may, could, might, will, or won't happen if you flash this.
I am providing it as-is, without any further support. If you require a dictionary at any point during this README, maybe
think twice before flashing. If this brings you success, then your welcome and please give credit where its due. If this
brings misfortune, then I hate to say it but I told you so but it isnt the end of the world.

-INSTRUCTIONS-

1. Before continuing, lookup how to recover your BIOS with a USB and Win + B

2. Format a USB drive as FAT32 and change the label to HP_TOOLS

3. Extract the Shell.zip to the root of the USB drive

4. Run InsydeFlash, it will auto flash the modded BIOS and reboot

5. Only have the USB with extracted files plugged in

6. When splash screeen appears press <F2>

7. Welcome to UEFI World!

-CREDITS-

Donovan6000 (http://donovan6000.blogspot.com

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