Forgot shellcode

shell.asm

@@ -0,0 +1,61 @@
+%define counter ecx
+%define functionSize ebx
+%define startAddress eax
+%define addressOfUnencripted edi
+%define tmp edx
+%define functionStoreAddress esi ;where the original function is stored
+
+segment .text
+
+justDoIt:;couldnt think of anything
+pushad
+pushfd
+
+
+mov counter, 0h ; this value will change
+cmp counter, 0x000000FF
+jne increaseCounter
+
+;incase that they're equal
+mov dword [12345678h], 0 ;restore the counter
+
+mov dword functionSize, 69h ;wont change
+mov dword startAddress, 68h ;same
+mov dword addressOfUnencripted, 67h ;this will change
+
+mov tmp, functionSize
+shl tmp, 1 ;double it
+add tmp, startAddress
+add tmp, 1
+
+mov functionStoreAddress, 12345678h
+
+cmp tmp, addressOfUnencripted
+jle resetAddressOfUnencripted
+
+;time to move it
+add addressOfUnencripted, 1 ;increase it
+mov [12345678h], addressOfUnencripted ; update it
+
+copyFunction:
+mov ecx, functionSize
+
+copy:
+movsb
+loop copy
+
+jmp endJustDoIt
+
+resetAddressOfUnencripted:
+mov addressOfUnencripted, startAddress
+mov [12345678h], addressOfUnencripted ;address where addressOfUnencripted is stored
+jmp copyFunction
+
+increaseCounter:
+add counter, 1h
+mov [12345678h], counter
+
+endJustDoIt:
+popfd
+popad
+jmp [12345678h]