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@7shi 7shi/makeexe.c
Last active Aug 29, 2015

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EXE入門で作ったプログラム
#include <windows.h>
#include <stdio.h>
#include <string.h>
void align(FILE *f, int size) {
int pos = ftell(f);
int aligned = (pos + size - 1) / size * size;
for (; pos < aligned; ++pos) {
fwrite("\0", 1, 1, f);
}
}
IMAGE_DOS_HEADER dosh;
IMAGE_NT_HEADERS32 nth;
IMAGE_SECTION_HEADER sects[1];
int main(void) {
strncpy((char *)&dosh.e_magic, "MZ", 2);
dosh.e_cblp = 0x90;
dosh.e_cp = 3;
dosh.e_cparhdr = 4;
dosh.e_maxalloc = 0xffff;
dosh.e_sp = 0xb8;
dosh.e_lfarlc = 0x40;
dosh.e_lfanew = 0x80;
strncpy((char *)&nth.Signature, "PE", 4);
nth.FileHeader.Machine = 0x014c;
nth.FileHeader.NumberOfSections = 1;
nth.FileHeader.TimeDateStamp = 0x4da65f9b;
nth.FileHeader.SizeOfOptionalHeader = sizeof(nth.OptionalHeader);
nth.FileHeader.Characteristics = 0x0102;
nth.OptionalHeader.Magic = 0x010b;
nth.OptionalHeader.MajorLinkerVersion = 0x0a;
nth.OptionalHeader.SizeOfCode = 0x0200;
nth.OptionalHeader.AddressOfEntryPoint = 0x1000;
nth.OptionalHeader.BaseOfCode = 0x1000;
nth.OptionalHeader.BaseOfData = 0x2000;
nth.OptionalHeader.ImageBase = 0x400000;
nth.OptionalHeader.SectionAlignment = 0x1000;
nth.OptionalHeader.FileAlignment = 0x0200;
nth.OptionalHeader.MajorOperatingSystemVersion = 5;
nth.OptionalHeader.MinorOperatingSystemVersion = 1;
nth.OptionalHeader.MajorSubsystemVersion = 5;
nth.OptionalHeader.MinorSubsystemVersion = 1;
nth.OptionalHeader.SizeOfImage = 0x2000;
nth.OptionalHeader.SizeOfHeaders = 0x0200;
nth.OptionalHeader.Subsystem = 2;
nth.OptionalHeader.SizeOfStackReserve = 0x100000;
nth.OptionalHeader.SizeOfStackCommit = 0x001000;
nth.OptionalHeader.SizeOfHeapReserve = 0x100000;
nth.OptionalHeader.SizeOfHeapCommit = 0x001000;
nth.OptionalHeader.NumberOfRvaAndSizes = 16;
strncpy((char *)sects[0].Name, ".text", 8);
sects[0].Misc.VirtualSize = 1;
sects[0].VirtualAddress = 0x1000;
sects[0].SizeOfRawData = 0x0200;
sects[0].PointerToRawData = 0x0200;
sects[0].Characteristics = 0x60000020;
FILE *f = fopen("test.exe", "wb");
fwrite(&dosh, sizeof(dosh), 1, f);
BYTE dos_stub[] = {
0x0e, // push cs
0x1f, // pop ds
0xba, 0x0e, 0x00, // mov dx, 0x000e
0xb4, 0x09, // mov ah, 0x09
0xcd, 0x21, // int 0x21
0xb8, 0x01, 0x4c, // mov ax, 0x4c01
0xcd, 0x21 // int 0x21
};
fwrite(dos_stub, sizeof(dos_stub), 1, f);
const char *dos_msg = "This program cannot be run in DOS mode.\r\r\n$";
fwrite(dos_msg, strlen(dos_msg), 1, f);
align(f, dosh.e_lfanew);
fwrite(&nth, sizeof(nth), 1, f);
fwrite(sects, sizeof(sects), 1, f);
align(f, nth.OptionalHeader.FileAlignment);
BYTE text[] = { 0xc3 };
fwrite(text, sizeof(text), 1, f);
align(f, nth.OptionalHeader.FileAlignment);
fclose(f);
return 0;
}
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