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Old 02-19-2020, 01:02 PM   #1
mattpd
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Default Surface Pro 4 - UEFI password removal please?

Could someone remove the password from this dump?

Also, if you have time can you point me to any resources that I can learn to do it myself?
Attached Files
File Type: zip SP4_i5_4GB_LOCKED_BIOS_BACKUP.zip (6.48 MB, 46 views)
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Old 02-19-2020, 03:59 PM   #2
peste
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Default Re: Surface Pro 4 - UEFI password removal please?

try...
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File Type: rar SP4_i5_4GB_LOCKED_BIOS_BACKUPc.rar (3.78 MB, 4 views)
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Old 02-21-2020, 10:00 AM   #3
mattpd
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Default Re: Surface Pro 4 - UEFI password removal please?

Quote:
Originally Posted by peste View Post
try...
No, it's still locked.

I have a clean ME dump for this BIOS. Would that help?

I can't use the clean ME BIOS directly though, because it makes the touch screen stop working. There must be something in the original BIOS that allows touch to function... I somehow need to combine them I think.
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Old 02-21-2020, 10:20 AM   #4
RethoricalCheese
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Default Re: Surface Pro 4 - UEFI password removal please?

Nah, don't mess with ME and such.
Try this.
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File Type: rar SP4_i5_4GB_LOCKED_BIOS_BACKUP_unlocked.rar (3.78 MB, 52 views)
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Old 02-21-2020, 12:19 PM   #5
mattpd
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Default Re: Surface Pro 4 - UEFI password removal please?

Quote:
Originally Posted by RethoricalCheese View Post
Nah, don't mess with ME and such.
Try this.
YES! Thank you.

Touch works, starts up fast, and no more BIOS password.

Can you tell me how you did it?

EDIT: I ran it though hex compare. The only difference between the two files are a single character at offset 00606620. Is that all it takes?

Last edited by mattpd; 02-21-2020 at 12:42 PM..
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Old 02-21-2020, 02:27 PM   #6
RethoricalCheese
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Default Re: Surface Pro 4 - UEFI password removal please?

Yes, that's all it takes. The tricky part is knowing the exact byte to modify
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Old 02-21-2020, 02:29 PM   #7
mattpd
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Default Re: Surface Pro 4 - UEFI password removal please?

Quote:
Originally Posted by RethoricalCheese View Post
Yes, that's all it takes. The tricky part is knowing the exact byte to modify
Wanna give a clue?
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Old 02-21-2020, 02:31 PM   #8
RethoricalCheese
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Default Re: Surface Pro 4 - UEFI password removal please?

Quote:
Originally Posted by mattpd View Post
Wanna give a clue?
I think the clue was "AWord"
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Old 02-21-2020, 02:38 PM   #9
mattpd
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Default Re: Surface Pro 4 - UEFI password removal please?

Quote:
Originally Posted by RethoricalCheese View Post
I think the clue was "AWord"
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Old 02-21-2020, 06:44 PM   #10
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Default Re: Surface Pro 4 - UEFI password removal please?

Quote:
Originally Posted by RethoricalCheese View Post
I think the clue was "AWord"
__________________
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Last edited by Vesko356; 02-21-2020 at 06:48 PM..
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