Auto Assembler Templates

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TimFun13
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Auto Assembler Templates

Post by TimFun13 »

[Link]

Auto Assembler Templates

When working with auto assembler it's usually easiest to start with a template.

Finding the injection point is beyond the scope of this tutorial, see: [Link]

Note: You should be attached to a process when working with the auto assembler, or you will tend to get errors. See this for attaching to a process: [Link]

How to load an auto assembler template

With the injection point selected (highlighted) in the memory view form, on the forms menu select tools then select auto assembler.

[Link]



This will open a new auto assembler form, with the injection point still highlighted in the memory view form, in the auto assembler form menu select templates then select the desired template.

[Link]



List of templates and prompts:
  • Code injection
    • Address
  • API Hook
    • API Hook prompt

      [Link]
      • Original API Address
      • New API Address
      • Address for Original API call storage - Optional
  • Code relocation
    • Start Address
    • End Address
  • Call CE lua function
  • AOB Injection
    • Address
    • Symbol
  • Full Injection
    • Address
  • Cheat Table framework code
So if aob injection was selected you would be asked for an address (injection point), a default one is pulled form the selected instruction in the memory view form.

[Link]



Next Cheat Engine will ask for the name of the symbol of the AOB, this needs to be unique so it can be registered (added to the user symbols list), to be available in the disable section.

[Link]



Then some thing like this would be generated:

[Link]





List of templates and examples:
  • Code injection

    Address: "Tutorial-i386.exe"+23B00

    Code: Select all

    alloc(newmem,2048)
label(returnhere)
label(originalcode)
label(exit)

newmem: //this is allocated memory, you have read,write,execute access
//place your code here

originalcode:
mov [ebx+00000480],eax

exit:
jmp returnhere

"Tutorial-i386.exe"+23B00:
jmp newmem
nop
returnhere:
  • API Hook

    Original API Address: 00423B00

    New API Address: 00123ABC

    Code: Select all

    alloc(originalcall,2048)
label(returnhere)


originalcall:

mov [ebx+00000480],eax
jmp returnhere

00423B00:
jmp 00123ABC
nop
returnhere:
  • Code relocation

    Start Address: 00423B00

    End Address: 00423B80

    Code: Select all

    alloc(newmem,256)

label(orig_00423B50)
label(orig_00423B67)

newmem:
mov [ebx+00000480],eax
lea edx,[ebp-2C]
call Tutorial-i386.exe+39D10
mov edx,[ebp-2C]
mov eax,[ebx+0000046C]
call Tutorial-i386.exe+93640
cmp dword ptr [ebx+00000480],00
mov eax,[Tutorial-i386.exe+14F224]
call Tutorial-i386.exe+118610
mov eax,00000064
mov [ebx+00000480],eax
lea edx,[ebp-2C]
call Tutorial-i386.exe+39D10
mov edx,[ebp-2C]
mov eax,[ebx+0000046C]
call Tutorial-i386.exe+93640

orig_00423B50:
call Tutorial-i386.exe+D730
lea eax,[ebp-2C]
call Tutorial-i386.exe+3BB0
pop eax
test eax,eax
call Tutorial-i386.exe+D860

orig_00423B67:
pop ebx
leave
ret
add [eax],al
add [eax],al
add [eax],al
push ebp
mov ebp,esp
lea esp,[esp-44]
push ebx
push esi
mov ebx,eax
mov [ebp-44],00000000
  • Call CE lua function

    Code: Select all

    loadlibrary(luaclient-i386.dll)
luacall(openLuaServer('CELUASERVER'))

CELUA_ServerName:
db 'CELUASERVER',0


{
//luacall call example:
push integervariableyouwishtopasstolua
push addresstostringwithfunction //(The lua function will have access to the variable passed by name "parameter")
call CELUA_ExecuteFunction

//------
//Alternate call by ref example:

mov eax,[addresswithluafunctionidstored]
test eax,eax
jne short hasrefid

push addresswithluafunctionname
call CELUA_GetFunctionReferenceFromName //Basically calls createRef(functionname) and returns the value
mov [addresswithluafunctionidstored],eax
hasrefid:
mov [addresswithparameterlist],param1
mov [addresswithparameterlist+4],param2
mov [addresswithparameterlist+8],param3
//...
push 0 //0=no async, 1=async. Use async if you do not wish to update the GUI. Faster
push addresswithparameterlist
push numberofparameterstopass
push eax //push the reference ID of the function
call CELUA_ExecuteFunctionByReference

When done EAX will contain the result of the lua function
And as per common 32-bit calling convention, EDX and ECX could have been altered. So save/restore them beforehand
}
  • AOB Injection

    Address: "Tutorial-i386.exe"+23B00

    Symbol: INJECT

    Code: Select all

    { Game : Tutorial-i386.exe
 Version:
 Date : 2017-03-18
 Author : ShyTwig16

 This script does blah blah blah
}

[ENABLE]

aobscanmodule(INJECT,Tutorial-i386.exe,89 83 80 04 00 00 8D 55 D4 E8 02) // should be unique
alloc(newmem,$1000)

label(code)
label(return)

newmem:

code:
 mov [ebx+00000480],eax
 jmp return

INJECT:
 jmp newmem
 nop
return:
registersymbol(INJECT)

[DISABLE]

INJECT:
 db 89 83 80 04 00 00

unregistersymbol(INJECT)
dealloc(newmem)

{
// ORIGINAL CODE - INJECTION POINT: "Tutorial-i386.exe"+23B00

"Tutorial-i386.exe"+23ADC: E8 CF 99 FE FF - call Tutorial-i386.exe+D4B0
"Tutorial-i386.exe"+23AE1: E8 DA B4 FE FF - call Tutorial-i386.exe+EFC0
"Tutorial-i386.exe"+23AE6: 50 - push eax
"Tutorial-i386.exe"+23AE7: 85 C0 - test eax,eax
"Tutorial-i386.exe"+23AE9: 75 65 - jne Tutorial-i386.exe+23B50
"Tutorial-i386.exe"+23AEB: B8 05 00 00 00 - mov eax,00000005
"Tutorial-i386.exe"+23AF0: E8 FB AB FE FF - call Tutorial-i386.exe+E6F0
"Tutorial-i386.exe"+23AF5: 8D 50 01 - lea edx,[eax+01]
"Tutorial-i386.exe"+23AF8: 8B 83 80 04 00 00 - mov eax,[ebx+00000480]
"Tutorial-i386.exe"+23AFE: 29 D0 - sub eax,edx
// ---------- INJECTING HERE ----------
"Tutorial-i386.exe"+23B00: 89 83 80 04 00 00 - mov [ebx+00000480],eax
// ---------- DONE INJECTING ----------
"Tutorial-i386.exe"+23B06: 8D 55 D4 - lea edx,[ebp-2C]
"Tutorial-i386.exe"+23B09: E8 02 62 01 00 - call Tutorial-i386.exe+39D10
"Tutorial-i386.exe"+23B0E: 8B 55 D4 - mov edx,[ebp-2C]
"Tutorial-i386.exe"+23B11: 8B 83 6C 04 00 00 - mov eax,[ebx+0000046C]
"Tutorial-i386.exe"+23B17: E8 24 FB 06 00 - call Tutorial-i386.exe+93640
"Tutorial-i386.exe"+23B1C: 83 BB 80 04 00 00 00 - cmp dword ptr [ebx+00000480],00
"Tutorial-i386.exe"+23B23: 7D 2B - jnl Tutorial-i386.exe+23B50
"Tutorial-i386.exe"+23B25: A1 24 F2 54 00 - mov eax,[Tutorial-i386.exe+14F224]
"Tutorial-i386.exe"+23B2A: E8 E1 4A 0F 00 - call Tutorial-i386.exe+118610
"Tutorial-i386.exe"+23B2F: B8 64 00 00 00 - mov eax,00000064
}
  • Full Injection

    Address: "Tutorial-i386.exe"+23B00

    Code: Select all

    { Game : Tutorial-i386.exe
 Version:
 Date : 2017-03-18
 Author : ShyTwig16

 This script does blah blah blah
}

define(address,"Tutorial-i386.exe"+ 23B00)
define(bytes,89 83 80 04 00 00)

[ENABLE]


assert(address,bytes)
alloc(newmem,$1000)

label(code)
label(return)

newmem:

code:
 mov [ebx+00000480],eax
 jmp return

address:
 jmp newmem
 nop
return:

[DISABLE]

address:
 db bytes
 // mov [ebx+00000480],eax

dealloc(newmem)

{
// ORIGINAL CODE - INJECTION POINT: "Tutorial-i386.exe"+23B00

"Tutorial-i386.exe"+23ADC: E8 CF 99 FE FF - call Tutorial-i386.exe+D4B0
"Tutorial-i386.exe"+23AE1: E8 DA B4 FE FF - call Tutorial-i386.exe+EFC0
"Tutorial-i386.exe"+23AE6: 50 - push eax
"Tutorial-i386.exe"+23AE7: 85 C0 - test eax,eax
"Tutorial-i386.exe"+23AE9: 75 65 - jne Tutorial-i386.exe+23B50
"Tutorial-i386.exe"+23AEB: B8 05 00 00 00 - mov eax,00000005
"Tutorial-i386.exe"+23AF0: E8 FB AB FE FF - call Tutorial-i386.exe+E6F0
"Tutorial-i386.exe"+23AF5: 8D 50 01 - lea edx,[eax+01]
"Tutorial-i386.exe"+23AF8: 8B 83 80 04 00 00 - mov eax,[ebx+00000480]
"Tutorial-i386.exe"+23AFE: 29 D0 - sub eax,edx
// ---------- INJECTING HERE ----------
"Tutorial-i386.exe"+23B00: 89 83 80 04 00 00 - mov [ebx+00000480],eax
// ---------- DONE INJECTING ----------
"Tutorial-i386.exe"+23B06: 8D 55 D4 - lea edx,[ebp-2C]
"Tutorial-i386.exe"+23B09: E8 02 62 01 00 - call Tutorial-i386.exe+39D10
"Tutorial-i386.exe"+23B0E: 8B 55 D4 - mov edx,[ebp-2C]
"Tutorial-i386.exe"+23B11: 8B 83 6C 04 00 00 - mov eax,[ebx+0000046C]
"Tutorial-i386.exe"+23B17: E8 24 FB 06 00 - call Tutorial-i386.exe+93640
"Tutorial-i386.exe"+23B1C: 83 BB 80 04 00 00 00 - cmp dword ptr [ebx+00000480],00
"Tutorial-i386.exe"+23B23: 7D 2B - jnl Tutorial-i386.exe+23B50
"Tutorial-i386.exe"+23B25: A1 24 F2 54 00 - mov eax,[Tutorial-i386.exe+14F224]
"Tutorial-i386.exe"+23B2A: E8 E1 4A 0F 00 - call Tutorial-i386.exe+118610
"Tutorial-i386.exe"+23B2F: B8 64 00 00 00 - mov eax,00000064
}
  • Cheat Table framework code

    Code: Select all

    [ENABLE]
//code from here to '[DISABLE]' will be used to enable the cheat


[DISABLE]
//code from here till the end of the code will be used to disable the cheat
See also
  • [Link]
Last edited by TimFun13 on Tue May 01, 2018 12:40 am, edited 2 times in total.
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