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Technique Name Category Analysis By Download Added On Last Updated
LordPE Anti Dumping Dumping ap0x AntiLordPE.zip March 11 2006
Description:
    .586
      .model flat, stdcall
      option casemap :none   ; case sensitive

      include \masm32\include\windows.inc
      include \masm32\include\user32.inc
      include \masm32\include\kernel32.inc

      includelib \masm32\lib\user32.lib
      includelib \masm32\lib\kernel32.lib

    .code

start:

; MASM32 antiLordPE example
; coded by ap0x
; Reversing Labs: http://ap0x.headcoders.net

; This example was taken from  Pavol Cerven`s book Crackproof your Software.
; This example increments size of image of our process by 0x3000. By doing this
; we confuse LordPE and it can not dump. There is a way to overcome this LordPE`s
; problem. You can always use Correct size of image option and make a process dump.

ASSUME FS:NOTHING
MOV EAX,DWORD PTR FS:[30h]

TEST EAX,EAX
JS @found_win9x
@found_winNT:
MOV EAX,[EAX+0Ch]
MOV EAX,[EAX+0Ch]
ADD DWORD PTR[EAX+20h],3000h
JMP @exit
@found_win9x:
PUSH 0
CALL GetModuleHandle
TEST EDX,EDX
JNS @exit
CMP DWORD PTR[EDX+08],-1
JNE @exit
MOV EDX,[EDX+4]
ADD DWORD PTR[EDX+50h],3000h
@exit:
PUSH 0
CALL ExitProcess

end start

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