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[Help] Expanding A EXE's Size.
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nog_lorp
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Joined: 26 Feb 2006
Posts: 743
PostPosted: Tue Nov 18, 2008 2:51 am    Post subject: Reply with quote
Perhaps something like
[code]void CodeCave() {
return;
__asm__ { db 64000 dup(0) };
}
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dnsi0
I post too much
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Joined: 04 Jan 2007
Posts: 2674
PostPosted: Tue Nov 18, 2008 5:44 pm    Post subject: Reply with quote
pkedpker wrote:
adding a bunch of nops at the end of the program should make the size bigger without messing up the program..

so just get a file to load up in ur C++ program as binary then get filesize of it and filesize +1 +2 +3 etc.. how big you want to make it +1024 would add around 1KB and keep adding 0x90 using strcat() and fputs() or something

but u dont have to get filesize etc.. if you open the file in append mode so it will end bytes to end anyways..

something like

Code:

int count = 0;
FILE* file;
char buffer[5000];
file = fopen ("smallvirus.exe","ab"); //b for binary i dont think it matters
buffer[0] = 0x90
for(int i=0;i<1024;i++) {
strcat(buffer, 90);
count++;
}
buffer[count] = '\0';
fputs (buffer,file);
fclose (file);


but i dont know if it will work might be different things in the header that gotta be changed as well..


Just putting code at the end doesn't help. You have to modify the header so that it actucally loads the code into memory. So this fails I guess.
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pkedpker
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Posts: 412
PostPosted: Tue Nov 18, 2008 9:12 pm    Post subject: Reply with quote
I guess not dnsi.

but nog_lorp idea seems best.. create a bytes of crap by adding a useless method into ur program.
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