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Finding Binary Clones with Opstrings & Function Digests: Part I

By Andrew Schulman, July 01, 2005

Reverse engineering is an invaluable engineering tool.
July, 2005: Finding Binary Clones with Opstrings & Function Digests: Part I 

004010A3                    fn_004010A3:                ; Xref 00401019
004010A3 55                     push    ebp
004010A4 8BEC                   mov     ebp,esp
004010A6 51                     push    ecx
004010A7                    loc_004010A7:               ; Xref 004010C1
004010A7 6A01                   push    1
004010A9 68<b>38894000</b>             push    offset 408938h
004010AE 8B4508                 mov     eax,[ebp+8]
004010B1 50                     push    eax
004010B2 6A00                   push    0
004010B4 FF15<b>24A24000</b>           call    dword ptr [MessageBoxA]
004010BA 8945FC                 mov     [ebp-4],eax
004010BD 837DFC01               cmp     dword ptr [ebp-4],1
004010C1 75E4                   jnz     loc_004010A7
004010C3 8BE5                   mov     esp,ebp
004010C5 5D                     pop     ebp
004010C6 C3                     ret

Figure 8: Same code as in Figure 7, but at a different location in a different file.



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