ExploitSerie/ASMJumps.asm at master · ksanchezcld/ExploitSerie · GitHub

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.386
.model flat, stdcall
option casemap :none

include C:\masm32\include\windows.inc
include C:\masm32\include\masm32.inc
include C:\masm32\include\kernel32.inc
includelib \masm32\lib\masm32.lib
includelib \masm32\lib\kernel32.lib

.data
    SampleString db "Simple String",0
    TempString db 2 DUP(0)

.code
start:
    ;El valor se almacena en el register EAX
    invoke szLen, addr SampleString

PrintNextChar:
    ;Copiar a TempString byte a byte en orden inverso con saltos condicionales.
    xor ebx,ebx
    mov bl, SampleString[eax-1]
    mov TempString, bl

    ;Print to the Screen
    push eax
    invoke StdOut, addr TempString
    pop eax
    dec eax
    jne PrintNextChar

    invoke ExitProcess, 0

end start