Flare On 2019 - task 9 - reloadered

main.cpp

#include <stdio.h>
#include <windows.h>
#include <peconv.h>

unsigned char encoded_val[0x34] = {
	0x44, 0x29, 0x36, 0x0A, 0x29, 0x0F, 0x05, 0x1B, 0x65, 0x26, 0x10, 0x04,
	0x2B, 0x68, 0x30, 0x2F, 0x00, 0x33, 0x2F, 0x05, 0x1A, 0x1F, 0x0F, 0x38,
	0x02, 0x18, 0x42, 0x02, 0x33, 0x1A, 0x28, 0x04, 0x2A, 0x47, 0x3F, 0x04,
	0x26, 0x64, 0x66, 0x4D, 0x10, 0x37, 0x3E, 0x28, 0x3E, 0x77, 0x1C, 0x3F,
	0x7E, 0x36, 0x34, 0x2A
};

void preprocess_buf()
{
	size_t eIndx;
	size_t v33 = 0;
	do
	{
		eIndx = 0;
		do
		{
			if (!(v33 % 3) || !(v33 % 7))
				encoded_val[eIndx] ^= v33;
			++eIndx;
		} while (eIndx < 0x34);
		++v33;
	} while (v33 < 0x539);
}



int main(int argc, char *argv[])
{
	preprocess_buf();
	FILE *fp;
	fopen_s(&fp,"xor_buffer1.bin", "wb");
	if (!fp) {
		return -1;
	}
	fwrite(encoded_val, 1, sizeof(encoded_val), fp);
	fclose(fp);
	std::cout << "Dumped!\n";
	system("pause");
	return 0;
}