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Daicai
How do I cheat?
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Joined: 24 Feb 2014
Posts: 3
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 Posted: Tue Jul 28, 2015 2:43 am Post subject: [VB.NET] Cheat Engine Scripts? [NOP, JMP, MOV] And More? |
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Hi,
So I'm trying to make my own trainer in VB.NET for learning purposes.
For easy cheat engine scripts like :
| Code: |
[ENABLE]
01563851:
db 0F 85
01563A19:
db 0F 85
[DISABLE]
01563851:
db 0F 84
01563A19:
db 0F 84
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I use this Module currently : pastebin. com/sj4Gvn1m (I have to link the module to make my question clear, sorry!)
I enable that hack by doing :
| Code: |
If CheckBox2.Checked = True Then
Dim Addy As IntPtr = &H1563851
Dim Addy2 As IntPtr = &H1563A19
Dim buffer2 As Byte() = New Byte() {&HF, &H85}
Dim buffer As Byte() = New Byte() {&HF, &H85}
WINAPI.WriteProcessMemory(Addy, buffer, buffer.Length)
WINAPI.WriteProcessMemory(Addy2, buffer2, buffer2.Length)
End If
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However, for the more complicated Cheat Engine scripts like this one :
| Code: |
[Enable]
Alloc(SPControl,128)
Label(Return)
SPControl:
mov [esp+8],#0//x Cords
mov [esp+C],#0 //Y cords
Return:
//6A FF 68 ? ? ? ? 64 A1 ? ? ? ? 50 81 ? ? ? ? ? 53 55 56 57 A1 ? ? ? ? 33 ? 50 8D ? 24 ? ? ? ? 64 ? ? ? ? ? 8B ? 8B ? 24 ? ? ? ? 8B ? 24 ? ? ? ? 8B
jmp 0163ABB0
01C59498: //4byte Scan address in Return [5th Result]
dd SPControl
[Disable]
01C59498: //Same as above
dd 0163ABB0//Address in Return
DeAlloc(SPControl)
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What do I do with the jmp, mov, ESP, and stuff like that?
Anyone ever did something like this before? mind giving me a hand please?
Thank you!
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atom0s
Moderator
 Reputation: 205
Joined: 25 Jan 2006
Posts: 8587
Location: 127.0.0.1
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| Posted: Tue Jul 28, 2015 11:15 am Post subject: |
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For jumps and calls, their value is not the raw address, but instead the distance offset to the destination being jumped to, or called.
That is calculated doing the following:
offset = ((to - from) - 5)
Once you have the offset to where you want to jump to, you can write the data to the given locations in memory you want to alter to the jump or call to.
As for the mov etc instructions, open up Cheat Engines memory browser at those addresses and copy the bytes you see there that are for those given instructions.
_________________
- Retired. |
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