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PE File Format question

null_endian
null_endian
in Programming and Coding

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Posted

In the PE file format, there is the DOS_HEADER and then right after that, there is a section called doscode which is by default 64 zero bytes. However, sometimes it is filled with an arbitrary number of bytes. Some PE files have a lot of bytes here, others don't. How can I calculate the number of bytes that doscode will be? There doesn't seem to be any field in the DOS header which specifies this. Thanks.

Hi

For 16-Bit files this source can help you(delphi/freePascal) :

https://0x2a.wtf/files/pesp.zip

For PE32/PE64 field "e_lfanew" point to Nt header offset so you can do something like this:

gap = e_lfanew- Sizeof(Dos_header)

 

BR,

h4sh3m

Edited by h4sh3m

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