独钓寒江雪
由于我的C用的比较少，所以大部分都用的汇编，部分地方用汇编写不是很方便，所以我用的C，由于只是学习，所以内核地址我没有计算都是硬编码的。过DNF主要分为三步，也许我的思路不太正确，反正可以OD调试，下断。 程序没怎么修边幅，因为只是测试，所以一般都没有写更改内核后的恢复，不过不妨碍使用。
第一步，这也是最起码的，你必须要能够打开游戏进程和线程，能够开打进程和线程后不被检测到
第二步，能够读写进村内存
第三步，能够用OD附加游戏进程 第四步，能够下硬件断点而不被检测
跳过NtReadVirtualMemory，NtWriteVirtualMemory函数头的钩子 代码:
#include
typedef struct _SERVICE_DESCRIPTOR_TABLE {
PVOID ServiceTableBase;
PULONG ServiceCounterTableBase; ULONG NumberOfService; ULONG ParamTableBase;
}SERVICE_DESCRIPTOR_TABLE,*PSERVICE_DESCRIPTOR_TABLE; //由于KeServiceDescriptorTable只有一项,这里就简单点了 extern PSERVICE_DESCRIPTOR_TABLE KeServiceDescriptorTable;//KeServiceDescriptorTable为导出函数
///////////////////////////////////// VOID Hook(); VOID Unhook();
VOID OnUnload(IN PDRIVER_OBJECT DriverObject); //////////////////////////////////////
ULONG JmpAddress;//跳转到NtOpenProcess里的地址 ULONG JmpAddress1;//跳转到NtOpenProcess里的地址
ULONG OldServiceAddress;//原来NtOpenProcess的服务地址 ULONG OldServiceAddress1;//原来NtOpenProcess的服务地址 //////////////////////////////////////
__declspec(naked) NTSTATUS __stdcall MyNtReadVirtualMemory(HANDLE ProcessHandle, PVOID BaseAddress,
PVOID Buffer,
ULONG NumberOfBytesToRead, PULONG NumberOfBytesReaded) {
//跳过去 __asm {
push 0x1c
push 804eb560h //共十个字节 jmp [JmpAddress] } }
__declspec(naked) NTSTATUS __stdcall MyNtWriteVirtualMemory(HANDLE ProcessHandle, PVOID BaseAddress, PVOID Buffer,
ULONG NumberOfBytesToWrite, PULONG NumberOfBytesReaded) {
//跳过去 __asm {
push 0x1c
push 804eb560h //共十个字节 jmp [JmpAddress1] } }
/////////////////////////////////////////////////// NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject,PUNICODE_STRING RegistryPath) {
DriverObject->DriverUnload = OnUnload; DbgPrint(\ Hook();
return STATUS_SUCCESS; }
/////////////////////////////////////////////////////
VOID OnUnload(IN PDRIVER_OBJECT DriverObject) {
DbgPrint(\ Unhook(); }
///////////////////////////////////////////////////// VOID Hook()
{
ULONG Address, Address1;
Address = (ULONG)KeServiceDescriptorTable->ServiceTableBase + 0xBA * 4;//0x7A为NtOpenProcess服务ID
Address1 = (ULONG)KeServiceDescriptorTable->ServiceTableBase + 0x115 * 4;//0x7A为NtOpenProcess服务ID
DbgPrint(\
OldServiceAddress = *(ULONG*)Address;//保存原来NtOpenProcess的地址 OldServiceAddress1 = *(ULONG*)Address1;//保存原来NtOpenProcess的地址 DbgPrint(\ DbgPrint(\
DbgPrint(\ DbgPrint(\
JmpAddress = (ULONG)0x805b528a + 7; //跳转到NtOpenProcess函数头＋10的地方，这样在其前面写的JMP都失效了
JmpAddress1 = (ULONG)0x805b5394 + 7; DbgPrint(\ DbgPrint(\ __asm
{ //去掉内存保护 cli
mov eax,cr0 and eax,not 10000h mov cr0,eax }
*((ULONG*)Address) = (ULONG)MyNtReadVirtualMemory;//HOOK SSDT *((ULONG*)Address1) = (ULONG)MyNtWriteVirtualMemory;
__asm
{ //恢复内存保护 mov eax,cr0 or eax,10000h mov cr0,eax sti } }
////////////////////////////////////////////////////// VOID Unhook()
{
ULONG Address, Address1;
Address = (ULONG)KeServiceDescriptorTable->ServiceTableBase + 0xBA * 4;//查找SSDT Address1 = (ULONG)KeServiceDescriptorTable->ServiceTableBase + 0x115 * 4;
__asm{ cli
mov eax,cr0 and eax,not 10000h mov cr0,eax }
*((ULONG*)Address) = (ULONG)OldServiceAddress;//还原SSDT *((ULONG*)Address1) = (ULONG)OldServiceAddress1;//还原SSDT
__asm{
mov eax,cr0 or eax,10000h mov cr0,eax sti }
DbgPrint(\}
由于它不断对DebugPort清零，所以要修改调试相关函数，使得所有的访问DebugPort的地方全部访问EPROCESS中的ExitTime字节，这样它怎么清零都无效了，也检测不到 代码: .386
.model flat, stdcall option casemap:none
include dnf_hook.inc
.const
Dspdo_1 equ 80643db6h Dmpp_1 equ 80642d5eh Dmpp_2 equ 80642d64h Dct_1 equ 806445d3h Dqm_1 equ 80643089h Kde_1 equ 804ff5fdh Dfe_1 equ 80644340h Pcp_1 equ 805d1a0dh
Mcp_1 equ 805b0c06h Mcp_2 equ 805b0d7fh Dmvos_1 equ 8064497fh Dumvos_1 equ 80644a45h Pet_1 equ 805d32f8h Det_1 equ 8064486ch Dep_1 equ 806448e6h
.code
;还原自己的Hook
DriverUnload proc pDriverObject:PDRIVER_OBJECT ret
DriverUnload endp
ModifyFuncAboutDbg proc addrOdFunc, cmd_1, cmd_2 pushad
mov ebx, addrOdFunc mov eax, cmd_1
mov DWORD ptr [ebx], eax mov eax, cmd_2
mov DWORD ptr [ebx + 4], eax popad ret
ModifyFuncAboutDbg endp
DriverEntry proc pDriverObject:PDRIVER_OBJECT, pusRegistryPath:PUNICODE_STRING cli
mov eax, cr0
and eax, not 10000h mov cr0, eax
invoke ModifyFuncAboutDbg, Dspdo_1, 90784789h, 0fde89090h invoke ModifyFuncAboutDbg, Dmpp_1, 90787e39h, 950f9090h invoke ModifyFuncAboutDbg, Dct_1, 90785e39h, 840f9090h invoke ModifyFuncAboutDbg, Dqm_1, 9078408bh, 45899090h invoke ModifyFuncAboutDbg, Kde_1, 90787839h, 13749090h invoke ModifyFuncAboutDbg, Dfe_1, 9078418bh, 0d2329090h invoke ModifyFuncAboutDbg, Pcp_1, 90784389h, 45f69090h invoke ModifyFuncAboutDbg, Mcp_1, 90785e39h, 950f9090h invoke ModifyFuncAboutDbg, Mcp_2, 90784a89h, 5e399090h invoke ModifyFuncAboutDbg, Dmvos_1, 9078498bh, 0cb3b9090h invoke ModifyFuncAboutDbg, Dumvos_1, 00787983h, 74909090h invoke ModifyFuncAboutDbg, Pet_1, 00787f83h, 74909090h invoke ModifyFuncAboutDbg, Det_1, 9078498bh, 0c9859090h