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Bl4ckB0xX

Memory Reading - whats wrong?

4 posts in this topic

Hi im trying to read a processes memory but it seems to have an error thats not shown in the Syntax Check ..

My memory functions:

#region _Mem()

Func _MemOpen($i_Pid, $i_Access = 0x1F0FFF, $i_Inherit = 0)
    Local $av_Return[2] = [DllOpen('kernel32.dll') ]
    Local $ai_Handle = DllCall($av_Return[0], 'int', 'OpenProcess', 'int', $i_Access, 'int', $i_Inherit, 'int', $i_Pid)
    If @error Then
        DllClose($av_Return[0])
        SetError(1)
        Return 0
    EndIf
    $av_Return[1] = $ai_Handle[0]
    Return $av_Return
EndFunc ;==>_MemOpen

Func _MemRead($ah_Mem, $i_Address, $i_Size = 0)
    If $i_Size = 0 Then
        Local $v_Return = ''
        Local $v_Struct = DllStructCreate('byte[1]')
        Local $v_Ret
        
        While 1
            $v_Ret = DllCall($ah_Mem[0], 'int', 'ReadProcessMemory', 'int', $ah_Mem[1], 'int', $i_Address, 'ptr', DllStructGetPtr($v_Struct), 'int', 1, 'int', '')
            $v_Ret = DllStructGetData($v_Struct, 1)
            If $v_Ret = 0 Then ExitLoop
            $v_Return &= Chr($v_Ret)
            $i_Address += 1
        WEnd
        
    Else
        Local $v_Struct = DllStructCreate('byte[' & $i_Size & ']')
        Local $v_Ret = DllCall($ah_Mem[0], 'int', 'ReadProcessMemory', 'int', $ah_Mem[1], 'int', $i_Address, 'ptr', DllStructGetPtr($v_Struct), 'int', $i_Size, 'int', '')
        Local $v_Return[$v_Ret[4]]
        For $i = 0 To $v_Ret[4] - 1
            $v_Return[$i] = DllStructGetData($v_Struct, 1, $i + 1)
        Next
    EndIf
    Return $v_Return
EndFunc ;==>_MemRead

Func _MemWrite($ah_Mem, $i_Address, $v_Inject)
    Local $av_Call = DllCall($ah_Mem[0], 'int', 'WriteProcessMemory', 'int', $ah_Mem[1], 'int', $i_Address, 'ptr', DllStructGetPtr($v_Inject), 'int', DllStructGetSize($v_Inject), 'int', '')
    Return $av_Call[0]
EndFunc ;==>_MemWrite

Func _MemClose($ah_Mem)
    Local $av_Ret = DllCall($ah_Mem[0], 'int', 'CloseHandle', 'int', $ah_Mem[1])
    DllClose($ah_Mem[0])
    Return $av_Ret[0]
EndFunc ;==>_MemClose

Func _MemCreate($1, $2 = 0, $3 = 0, $4 = 0, $5 = 0, $6 = 0, $7 = 0, $8 = 0, $9 = 0, $10 = 0, $11 = 0, $12 = 0, $13 = 0, $14 = 0, $15 = 0, _
        $16 = 0, $17 = 0, $18 = 0, $19 = 0, $20 = 0, $21 = 0, $22 = 0, $23 = 0, $24 = 0, $25 = 0, $26 = 0, $27 = 0, $28 = 0, $29 = 0, _
        $30 = 0, $31 = 0, $32 = 0, $33 = 0, $34 = 0, $35 = 0, $36 = 0, $37 = 0, $38 = 0, $39 = 0, $40 = 0, $41 = 0, $42 = 0, $43 = 0, _
        $44 = 0, $45 = 0, $46 = 0, $47 = 0, $48 = 0, $49 = 0, $50 = 0, $51 = 0, $52 = 0, $53 = 0, $54 = 0, $55 = 0, $56 = 0, $57 = 0, _
        $58 = 0, $59 = 0, $60 = 0, $61 = 0, $62 = 0, $63 = 0, $64 = 0, $65 = 0, $66 = 0, $67 = 0, $68 = 0, $69 = 0, $70 = 0, $71 = 0, _
        $72 = 0, $73 = 0, $74 = 0, $75 = 0, $76 = 0, $77 = 0, $78 = 0, $79 = 0, $80 = 0, $81 = 0, $82 = 0, $83 = 0, $84 = 0, $85 = 0, _
        $86 = 0, $87 = 0, $88 = 0, $89 = 0, $90 = 0, $91 = 0, $92 = 0, $93 = 0, $94 = 0, $95 = 0, $96 = 0, $97 = 0, $98 = 0, $99 = 0)
    If IsString($1) Then
        $1 = StringSplit($1, '')
        Local $v_Helper = DllStructCreate('byte[' & UBound($1) & ']')
        For $i = 1 To UBound($1) - 1
            DllStructSetData($v_Helper, 1, Asc($1[$i]), $i)
        Next
    Else
        Local $v_Helper = DllStructCreate('byte[' & @NumParams & ']')
        For $i = 1 To @NumParams
            DllStructSetData($v_Helper, 1, Eval($i), $i)
        Next
    EndIf
    Return $v_Helper
EndFunc ;==>_MemCreate

Func _MemRev($v_DWORD)
    If UBound($v_DWORD) = 4 Then Return '0x' & Hex($v_DWORD[3], 2) & Hex($v_DWORD[2], 2) & Hex($v_DWORD[1], 2) & Hex($v_DWORD[0], 2)
    Local $v_Ret[4] = ['0x' & StringMid(Hex($v_DWORD, 8), 7, 2), '0x' & StringMid(Hex($v_DWORD, 8), 5, 2), '0x' & StringMid(Hex($v_DWORD, 8), 3, 2), '0x' & StringMid(Hex($v_DWORD, 8), 1, 2) ]
    Return $v_Ret
EndFunc ;==>_MemRev

Func _MemAlloc($ah_Mem, $i_Size, $i_Address = 0, $i_AT = 4096, $i_Protect = 0x40)
    Switch @OSVersion
        Case "WIN_ME", "WIN_98", "WIN_95"
            $av_Alloc = DllCall($ah_Mem[0], 'int', 'VirtualAlloc', 'int', $i_Address, 'int', $i_Size, 'int', BitOR($i_AT, 0x8000000), 'int', $i_Protect)
        Case Else
            $av_Alloc = DllCall($ah_Mem[0], 'int', 'VirtualAllocEx', 'int', $ah_Mem[1], 'int', $i_Address, 'int', $i_Size, 'int', $i_AT, 'int', $i_Protect)
    EndSwitch
    Return $av_Alloc[0]
EndFunc ;==>_MemAlloc

Func _MemFree($ah_Mem, $i_Address)
    Switch @OSVersion
        Case "WIN_ME", "WIN_98", "WIN_95"
            $av_Free = DllCall($ah_Mem[0], 'int', 'VirtualFree', 'int', $i_Address, 'int', 0, 'int', 0x8000)
        Case Else
            $av_Free = DllCall($ah_Mem[0], 'int', 'VirtualFreeEx', 'int', $ah_Mem[1], 'int', $i_Address, 'int', 0, 'int', 0x8000)
    EndSwitch
    Return $av_Free[0]
EndFunc ;==>_MemFree

Func _MemText($ah_Mem, $s_Text)
    Local $i_Size = StringLen($s_Text) + 1
    Local $i_Addr = _MemAlloc($ah_Mem, $i_Size)
    _MemWrite($ah_Mem, $i_Addr, _MemCreate($s_Text))
    Return $i_Addr
EndFunc ;==>_MemText

#endregion

The part that doesnt work:

Func GetStats()
    $pid = WinGetProcess( $Title )
    $m_hProcess = _MemOpen ( $pid )
    $HP = _MemRead ( $m_hProcess, 0x00F694B8, 0 )
EndFunc

Func test()
    Msgbox ( 0, "Test", $HP )
EndFunc

Syntax Check says:

>C:\Programme\AutoIt3\SciTE\..\au3check.exe "C:\Dokumente und Einstellungen\User\Desktop\AutoIT\test.au3"

AutoIt3 Syntax Checker v1.54.8 Copyright © Tylo 2007

C:\Dokumente und Einstellungen\User\Desktop\AutoIT\test.au3 - 0 error(s), 0 warning(s)

>Exit code: 0 Time: 0.205

The MsgBox that should show the $HP variable is empty when i call it ...

anyone knows whats my fault??

thanks in advance

greetz Bl4cKBoxX

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How did you get the memory address of 0x00F694B8?


Serial port communications UDF Includes functions for binary transmission and reception.printing UDF Useful for graphs, forms, labels, reports etc.Add User Call Tips to SciTE for functions in UDFs not included with AutoIt and for your own scripts.Functions with parameters in OnEvent mode and for Hot Keys One function replaces GuiSetOnEvent, GuiCtrlSetOnEvent and HotKeySet.UDF IsConnected2 for notification of status of connected state of many urls or IPs, without slowing the script.

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I used a Cheat Engine to find it ... the memory is static, not dynamic

so you mean thats my fault??

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I used a Cheat Engine to find it ... the memory is static, not dynamic

Ok, so I assume it's cthe correct address.

so you mean thats my fault??

I don't understand that comment so I'll ignore it.

If you use 0 as the last aparameter in _MemRead the return will be every byte read from the start address until a byte of zero is read. I imagine this is for reading strings which use a byte of zero to indicate the end of the string. If you see nothing in your message box then probably the memory address you are reading has 0 as the first byte.

Try using 8 instead on the basis that there is a 32 bit integer stored at that location, maybe a memory address.


Serial port communications UDF Includes functions for binary transmission and reception.printing UDF Useful for graphs, forms, labels, reports etc.Add User Call Tips to SciTE for functions in UDFs not included with AutoIt and for your own scripts.Functions with parameters in OnEvent mode and for Hot Keys One function replaces GuiSetOnEvent, GuiCtrlSetOnEvent and HotKeySet.UDF IsConnected2 for notification of status of connected state of many urls or IPs, without slowing the script.

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