Problem with BIOS password for MSI GT73EVR

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  • adamantinus
    New Member
    • Jan 2023
    • 6
    • Spain
    #1

    Problem with BIOS password for MSI GT73EVR

    Hi everyone,

    I have a problem with my BIOS password on MSI GT73EVR Laptop (2017)
    I forgot the password because I set it 3 years ago.
    Probably the pass is an easy example, but I don't remember. passwords that I try:
    B10s-p4ss
    H3ll0-W0rld
    B10s-Ms1
    gt73-t1t4n
    etc...

    I tried this:
    I opened the laptop and removed cmos battery, but password is persistent.
    Then i used the CH341A programmer to extract the BIOS to find the key with UEFITool. (attached .bin in txt)
    Here the hex code:

    20 16 9D F6 72 33 EA 38 15 84 E1 5D B5 73 EB 74
    6B B7 82 9E 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 C6 90 59 A0 A3 4A FE 37
    B7 D6 CF 88 9B 13 D9 7E B4 CE B4 24 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    01 00

    I have read this documentation.
    https://www.badcaps.net/forum/showthread.php?t=103526

    I try example for ASUS, HP and DELL this guide (but XOR calculator not work for this MSI)
    https://www.badcaps.net/forum/showpo...55&postcount=2

    I am doing something wrong?

    and this post:
    AMITSESetup Decryptor (I don't know Python, I don't understand why the script gives me an error)
    https://www.badcaps.net/forum/showthread.php?p=1098223
    (I did not succeed)


    I can't find exactly info for MSI and any solution shown there not work for me.

    I ask for help, if someone can help me to solve the password.
    (Sorry for my bad English)
    Attached Files
    Tags: None
    • hardware1
      Badcaps Legend
      • Sep 2021
      • 2887
      • N/A
      #2
      Re: Problem with BIOS password for MSI GT73EVR

      It's better to upload your backup bios here, and someone will try to decrypt it or remove it for you.
      Last edited by piernov; 01-15-2023, 12:51 PM.
      ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests
      all donations are welcome,
      see the donate button at the bottom of the page, or
      >>>>>       click on this link to donate via PayPal. <<<<<
      Every donation made will go towards server fees and maintenance costs.
      ----------------------------------------------------------------------------------------------------------------------------------------------------------------------

        Comment

        • adamantinus
          New Member
          • Jan 2023
          • 6
          • Spain
          #3
          Re: Problem with BIOS password for MSI GT73EVR

          Originally posted by hardware1
          It's better to upload your backup bios here, and someone will try to decrypt it or remove it for you.
          sharing my bios is not dangerous?
          I mean posting the BIOS includes my hardware info or serial number

          But I'm not sure,
          If I can solve it with XOR calculator, I prefer it
          Also, if others fix it for me, then there will be no documentation of this problem.

            Comment

            • fxreen
              Banned
              • Sep 2022
              • 39
              • Brazil
              #4
              Re: Problem with BIOS password for MSI GT73EVR

              Originally posted by adamantinus
              sharing my bios is not dangerous?
              I mean posting the BIOS includes my hardware info or serial number

              But I'm not sure,
              If I can solve it with XOR calculator, I prefer it
              Also, if others fix it for me, then there will be no documentation of this problem.
              @adamantinus
              Your password uses an unknown hash, it is not possible to compute it with the standard AMI_key = int("0x935b", 16)

                Comment

                • adamantinus
                  New Member
                  • Jan 2023
                  • 6
                  • Spain
                  #5
                  Re: Problem with BIOS password for MSI GT73EVR

                  Originally posted by fxreen
                  @adamantinus
                  Your password uses an unknown hash, it is not possible to compute it with the standard AMI_key = int("0x935b", 16)
                  ok, good,thanks for the reply.

                  Is there a way to find out?
                  with brute-force tool or hidden in nvram? for example.

                    Comment

                    • adamantinus
                      New Member
                      • Jan 2023
                      • 6
                      • Spain
                      #6
                      Re: Problem with BIOS password for MSI GT73EVR

                      Originally posted by hardware1
                      It's better to upload your backup bios here, and someone will try to decrypt it or remove it for you.
                      I didn't find any information, you're right.
                      I am attaching the bios in case someone can help me remove the password or cancel it, i'm sorry for the delay.
                      it's my first day here
                      Attached Files

                        Comment

                        • hardware1
                          Badcaps Legend
                          • Sep 2021
                          • 2887
                          • N/A
                          #7
                          Re: Problem with BIOS password for MSI GT73EVR

                          Originally posted by adamantinus
                          I didn't find any information, you're right.
                          I am attaching the bios in case someone can help me remove the password or cancel it, i'm sorry for the delay.
                          it's my first day here
                          No Problem.
                          Here's your Unlocked file, try it.
                          Attached Files
                          ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
                          Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests
                          all donations are welcome,
                          see the donate button at the bottom of the page, or
                          >>>>>                           click on this link to donate via PayPal. <<<<<
                          Every donation made will go towards server fees and maintenance costs.
                          ----------------------------------------------------------------------------------------------------------------------------------------------------------------------

                            Comment

                            • AAAC
                              Badcaps Veteran
                              • Jan 2020
                              • 457
                              • Mexico
                              #8
                              Re: Problem with BIOS password for MSI GT73EVR

                              Originally posted by fxreen
                              @adamantinus
                              Your password uses an unknown hash, it is not possible to compute it with the standard AMI_key = int("0x935b", 16)
                              Maybe it's a SHA-1 hash, 160-bit (20-hex bytes).

                                Comment

                                • adamantinus
                                  New Member
                                  • Jan 2023
                                  • 6
                                  • Spain
                                  #9
                                  Re: Problem with BIOS password for MSI GT73EVR

                                  Originally posted by hardware1
                                  No Problem.
                                  Here's your Unlocked file, try it.
                                  The file worked, thank you very much
                                  so the solution was to write zeros to the hash on both nvrams.
                                  not erase, just fill...
                                  That's why I had a checksum error

                                  now everything is solved!!

                                    Comment

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