Cheat Engine Forum Index Cheat Engine
The Official Site of Cheat Engine
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 


Issue related to DBVM

 
Post new topic   Reply to topic    Cheat Engine Forum Index -> Cheat Engine
View previous topic :: View next topic  
Author Message
bhopo
How do I cheat?
Reputation: 0

Joined: 03 Nov 2023
Posts: 4

PostPosted: Fri Nov 03, 2023 2:33 pm    Post subject: Issue related to DBVM Reply with quote

IM using DBVM to virtualize the page that contain my opcodes to modify, so the game executes my modified bytes while the integrity checks read the original code.


The problem is that sometimes the game doesn't execute (change) the modified code after enabling DBVM!! and it instead executes the original code


I uploaded 2 screen shots the first 1 DBVM works well but the second one

doesn't execute my modified code and still execute original code.



ScreenShot 1.jpg
 Description:
here I enabled DBVM then modified my code and the game executed it and changed value successfuly
 Filesize:  61.13 KB
 Viewed:  1684 Time(s)

ScreenShot 1.jpg



ScreenShot 2.jpg
 Description:
here I enabled DBVM and modified code but the game doesn't change the value or execute my modified code
 Filesize:  78.38 KB
 Viewed:  1684 Time(s)

ScreenShot 2.jpg


Back to top
View user's profile Send private message AIM Address
Dark Byte
Site Admin
Reputation: 470

Joined: 09 May 2003
Posts: 25788
Location: The netherlands

PostPosted: Fri Nov 03, 2023 3:42 pm    Post subject: Reply with quote

did you change the byte using the disassembler/assembler using then db instruction ir did you use the hexview or addresslist ?

cloaked regions only get changed by the assembler, not by value change operations

also, cloak only effects executable code. It has no real usefulness for data

_________________
Do not ask me about online cheats. I don't know any and wont help finding them.

Like my help? Join me on Patreon so i can keep helping
Back to top
View user's profile Send private message MSN Messenger
bhopo
How do I cheat?
Reputation: 0

Joined: 03 Nov 2023
Posts: 4

PostPosted: Fri Nov 03, 2023 5:51 pm    Post subject: Reply with quote

Dark Byte wrote:
did you change the byte using the disassembler/assembler using then db instruction ir did you use the hexview or addresslist ?

cloaked regions only get changed by the assembler, not by value change operations

also, cloak only effects executable code. It has no real usefulness for data



yes, the modifications are done in the disassembler region i first click actvate dbvm cloak then modify my code and yeah it's read write execute code

and here's a screenshot showing my script used to modify the code

it;s wallhack code to enable wall hack the value should changed from 257 to 256 and that s done by changing the first byte of the instruction but after doing that the value remain 257!!

and if I modify the code without dbvm the value changes to 256! so why it dosnt have effect with dbvm

despite I had made onther modifications to different fnctions and they worked with dbvm?



reply2.jpg
 Description:
 Filesize:  447.18 KB
 Viewed:  1644 Time(s)

reply2.jpg



script.jpg
 Description:
i activate the script after activating cloaking but the value remain 257 and dosn't change to 256
 Filesize:  101.79 KB
 Viewed:  1644 Time(s)

script.jpg


Back to top
View user's profile Send private message AIM Address
Dark Byte
Site Admin
Reputation: 470

Joined: 09 May 2003
Posts: 25788
Location: The netherlands

PostPosted: Sat Nov 04, 2023 12:45 am    Post subject: Reply with quote

dbvm only reroutes execution. only if the cpu was to execute these 00 01 etc... instructions it would be affected (which it won't ad that"d lead to a crash)

tip: don't bother cloaking memory that is writable

if you want to change the readout of those bytes hook the code that reads them and change it there

_________________
Do not ask me about online cheats. I don't know any and wont help finding them.

Like my help? Join me on Patreon so i can keep helping
Back to top
View user's profile Send private message MSN Messenger
Display posts from previous:   
Post new topic   Reply to topic    Cheat Engine Forum Index -> Cheat Engine All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group

CE Wiki   IRC (#CEF)   Twitter
Third party websites