Does anyone know why the PE DOS stub often includes repetitive looking data that does not seem to be valid 16bit commands?

enter image description here

  • did you try to open the file with pe explorer ?
    – Abr001am
    Commented Jan 12, 2018 at 16:47

1 Answer 1


This is the so-called "Rich header", added by Microsoft's link.exe (you can see the text "Rich" at the end of the mysterious block). It contains information about the versions of compilers and other tools which participated in producing the code of the executable. Some references:


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