Removing/Deactivating Computrace

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1 year 11 months ago #7014 by neighborhoodguy
Hi All! So, I have a Lenovo T460s with activated computrace with I want to disable. I've been thinking along the lines of either:

1 removing the option roms/efi/dxe/whatnot for computrace modules from dump and reflashing it

2 changing the nvram or other stored variable which manages computrace state (possibly in TPM?)

3 editing or removing only one of the modules so it fails (in case there are integrity checks or signed things that would keep me from just ripping it out, can I just break it lol)

So, I've already dumped the chip. I tried using the UEFITool to remove all 4 modules with computrace in the name, but reflashing that dump gave me a brick that beeps five times and turns off. Restoring the original returned the machine to working order....

So, I'm going to try removing just one module ( there are 4 with computrace in the names, so if i try removing just one but leaving others... maybe?)

I need to know what the VFT and the _FIT_ and all these other tables are. Can anyone point me to a good resource for a quick study?

I've attached the locked dump. The system is unlocked; no supervisor password. Its activated, so you can't disable it in bios setup screens. Perhaps the bios setup rom would lead to where it is stored?

Let me what you're thinking guys...
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1 year 11 months ago #7016 by vnn567

neighborhoodguy wrote: Hi All! So, I have a Lenovo T460s with activated computrace with I want to disable. I've been thinking along the lines of either:

1 removing the option roms/efi/dxe/whatnot for computrace modules from dump and reflashing it

2 changing the nvram or other stored variable which manages computrace state (possibly in TPM?)

3 editing or removing only one of the modules so it fails (in case there are integrity checks or signed things that would keep me from just ripping it out, can I just break it lol)

So, I've already dumped the chip. I tried using the UEFITool to remove all 4 modules with computrace in the name, but reflashing that dump gave me a brick that beeps five times and turns off. Restoring the original returned the machine to working order....

So, I'm going to try removing just one module ( there are 4 with computrace in the names, so if i try removing just one but leaving others... maybe?)

I need to know what the VFT and the _FIT_ and all these other tables are. Can anyone point me to a good resource for a quick study?

I've attached the locked dump. The system is unlocked; no supervisor password. Its activated, so you can't disable it in bios setup screens. Perhaps the bios setup rom would lead to where it is stored?

Let me what you're thinking guys...

send me file your BIOS

Be Contact Me When You Need To Unlock or Remove Password.My Skype : haisung4344

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1 year 11 months ago #7019 by neighborhoodguy
oops, here it is
had to zip it...

opening with uefitool finds errors:
'Parsefit: invalid FIT table checksum 7Fh should be 1Fh
FIT table candidate found, but not referenced from the last VTF
real FIT table found at physical address FFEB0000h

I fixed the checksum using HxD editor and flashed and it booted sucessfully..
As i said, the first dump with the 4 modules removed wouldn't boot, so hopefully if the checksum was an issue after ripping out the 4 modules, it won't be now.

So where can I find a list of all the tables (and what they refer to). So that I can manipulate it :evil:

I think finding the setup menu and locating where the variables which hold the settings present there is good start - but doubt solution is that easy
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1 year 11 months ago #7023 by Flash22
Do you have ubu tools, the MMtool (designed for ami but still works with phoenix) can generate a report - if you remove the SMM for the computrace that should kill it - or extract the module and FF or zero fill it

The report from your bios
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1 year 11 months ago #7024 by vnn567

Flash22 wrote: Do you have ubu tools, the MMtool (designed for ami but still works with phoenix) can generate a report - if you remove the SMM for the computrace that should kill it - or extract the module and FF or zero fill it

The report from your bios

Dear friend
you can't unlock/remove if you use that method

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1 year 11 months ago #7025 by zenelli
I think the computrace and the svp bios password are stored in mec 1633L chip and not your bios chip.
so you must program the mec 1633L chip with a new dump.

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1 year 11 months ago - 1 year 10 months ago #7037 by vnn567
done.............

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Last edit: 1 year 10 months ago by vnn567.

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1 year 11 months ago #7038 by zenelli

vnn567 wrote: Hi mọi người
Mình sẽ hướng dẫn mọi người Remove/Unlock password BIOS và Computrace các dòng IBM ThinkPad

-- 3th Generation : T430 , T430s, W530 .....
-- 4th Generation : T440, T440s, T440p, T540, W540, W541, , X240.....
-- 5th Generation : T450, T450s, W550s ,X250, X1 carbon gen2 and gen3, Helix , Thinkpad Yoga 12 and Yoga 15.....
-- 6th Generation : P40, P50 , P50s and P70 ,X1 Yoga, X260, T460 and T560 .....
Update 7th Generation : T470 , T470s ,T570, ......The newest models---
# Unlock/Remove IBM ThinkPad --Xử lý trong vòng 12-24h

Step 1 :
Step 2 :
Step 3 :
:) Upgrade Firmware BIOS không Relock again
:) Khởi động nhanh không chậm
:) Làm việc ổn định
:) Nếu sai đền tiền 100%


ok,
how much you ask for it?
and is this the same method from allservice?

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1 year 11 months ago #7039 by neighborhoodguy
Yes, I think you are correct. It looks I might be able to access it using jtag programmer. Or Vertyanov programmer, which might be a handy addition to the workbench.

I'd like to get a hold of an allservice patched bios... Anybody have a dump? Curious how adding modules works. And finding checksums.

@Flash22: yes, I was able to get a little more info from the MMtool; thanks!

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1 year 11 months ago #7045 by zenelli
hardware id: 3425684
key: 8625856

Let me know if it worked
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1 year 11 months ago #7046 by vnn567
i restarted my laptop
and now Hardware ID : 6809683
please Let me new Key :

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1 year 10 months ago #7047 by zenelli

vnn567 wrote: i restarted my laptop
and now Hardware ID : 6809683
please Let me new Key :


i'm sorry no other key

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1 year 10 months ago - 1 year 10 months ago #7048 by vnn567

zenelli wrote:

vnn567 wrote: i restarted my laptop
and now Hardware ID : 6809683
please Let me new Key :


i'm sorry no other key

now Hardware ID : 6809683
please Let me Key : ? ? ?
what can i do now ?

Be Contact Me When You Need To Unlock or Remove Password.My Skype : haisung4344
Last edit: 1 year 10 months ago by vnn567.

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1 year 10 months ago #7049 by zenelli

vnn567 wrote:

zenelli wrote:

vnn567 wrote: i restarted my laptop
and now Hardware ID : 6809683
please Let me new Key :


i'm sorry no other key

now Hardware ID : 6809683
please Let me Key : ? ? ?
what can i do now ?


I do not know, try to get hardware id: 3425684
restart laptop again or enter wrong ket to get another hardware id

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1 year 10 months ago #7050 by vnn567

zenelli wrote:

vnn567 wrote:

zenelli wrote:

vnn567 wrote: i restarted my laptop
and now Hardware ID : 6809683
please Let me new Key :


i'm sorry no other key

now Hardware ID : 6809683
please Let me Key : ? ? ?
what can i do now ?


I do not know, try to get hardware id: 3425684
restart laptop again or enter wrong ket to get another hardware id

i enter wrong and restart to get new hardware id

Be Contact Me When You Need To Unlock or Remove Password.My Skype : haisung4344

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1 year 10 months ago #7051 by vnn567

vnn567 wrote:

zenelli wrote:

vnn567 wrote:

zenelli wrote:

vnn567 wrote: i restarted my laptop
and now Hardware ID : 6809683
please Let me new Key :


i'm sorry no other key

now Hardware ID : 6809683
please Let me Key : ? ? ?
what can i do now ?


I do not know, try to get hardware id: 3425684
restart laptop again or enter wrong ket to get another hardware id

i enter wrong and restart to get new hardware id

i enter wrong and restart to get new hardware id
now Hardware ID : 6809683
KEY : help help

Be Contact Me When You Need To Unlock or Remove Password.My Skype : haisung4344

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1 year 10 months ago #7086 by neighborhoodguy
Thank you!

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1 year 10 months ago #7090 by zenelli

neighborhoodguy wrote: Thank you!


Your welcome

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1 year 10 months ago #7094 by Doni
does it work the bin file from t440s? i have lenovo thinkpad t460s with supervisor password,

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1 year 10 months ago #7096 by vnn567

Doni wrote: does it work the bin file from t440s? i have lenovo thinkpad t460s with supervisor password,

SEND ME dUMP BIOS FILE

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