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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 

C:\TEST>fciv \windows\system32 | sort
 ...
0ccaf5f4111f7366588d3840b0067dc2 \windows\system32\igfxrjpn.lrc
0ce97f997318122e726fc94e56f3cbf3 \windows\system32\SOFTPUB.DLL
<b>0cf4c7f3341d73d4044053b203ac04e5</b> \windows\system32\wmp.ocx
<b>0cf4c7f3341d73d4044053b203ac04e5</b> \windows\system32\wmpcd.dll
<b>0cf4c7f3341d73d4044053b203ac04e5</b> \windows\system32\wmpcore.dll
<b>0cf4c7f3341d73d4044053b203ac04e5</b> \windows\system32\wmpui.dll
0cfd77715e899e9fde1db92e64a4a897 \windows\system32\secedit.exe
0d143112394173967a3647096f74e743 \windows\system32\C_037.NLS
 ...

Figure 5: Some duplicated files in an updated version of Windows XP.



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